Mercedes M156 6.2L AMG V8 Blown Engine Teardown. Oh The Devastation!
Whoever leaves the comment which gets the most amount of likes in the first week of this videos upload, wins the mentioned parts from this engine, no matter where you are, I'll make sure you get them!
My name is Eric and I own and run a full service auto salvage business called Importapart located in the Saint Louis MO area. Part of our model is dismantling and selling parts from rare and niche market engines. I've torn down everything from an LS7 to a Renesis rotary engine. There are several videos to watch! Check out my playlist of engine teardowns here: • Blown Up Engine Tear D...
In this video we tear down a complete Mercedes M156 6.2L AMG V8, which is found in the ML63, CLS63, SL63, E63, CLK63, R63, CL63 and C63.
This particular engine came from a 2007 ML63, which I could tell by part numbers and date stamping on the engine. This engine has a LOT of great parts, many of which were ruined when this engine met its demise.
Thanks for watching this video and let me know what other types of engines you'd like to see torn down!
If you'd like to buy parts from this engine, or others like it, email me at Importapartsales@gmail.com.
-Eric
Mercedes takes their cylinder deactivation technology VERY seriously.
An engine that doesn't run gets infinite fuel economy
@@brandonupchurch7628 A engine rolling down a hill gives you Fuel Economy.
😂👍
Brilliant
😂😂
"I'll send you the destroyed Mercedes engine parts" don't make your problems my problems buddy.
Here's a free like , lol Enjoy yer parts! If you dont want them , you could donate them to another person below. Or do what you were going to do. Or sell em off for charity? Edit: added moar stuff...
If you win, you lose. Have a like. Lol.
Sounds like you got a box of problems headed your way 🧐
Honestly I would’ve been quite happy with them but it looks like they will be all yours
This one wins. Even though he doesn’t want to lol.
It is my understanding that worn cam lobes and tappets are the main reliability issue that these 6.2 AMG V8 engines suffer, hence the value of the camshafts. This engine almost definitley succumbed to this failure, the cam lobe wore through the top of the tappet, then beat up the valve stem and retainer until they could no longer retain the spring, leading to a dropped intake valve. The dropped valve then made unwelcome acquaintances with the piston, breaking the head of the valve off. With the head of the intake valve now wreaking havoc in the number 5 cylinder, the heads of both exhaust valves broke off, the combustion chamber and spark plug were destroyed and the hypereutectic piston disintegrated. Given how intact the #5 rod and wrist pin still were most of the damage to the oil pump and crankcase were likely a result of piston debris becoming wedged between some of the still moving parts. Having said all that, this engine was shut off very quickly after the initial failure, however the valvetrain was likely making a ticking noise for some time before it blew.
Looks like you hit the nail on the head.
I fucking love seeing people understand engines
@@tslaughter1240 has more to do with people not changing their oil and running low. Im on 220k miles original valvetrain.
@@HorsepowerTherapy2 it also depends on climates your in. I've never experienced any valve problems on any c63 I've owned but for people that live in hot places plus lack of maintenance. never a good thing but yeah. vette guy guessed it right. cams and buckets should be changed before this happens problem is lot of people don't think of the consequences or jus don't have the funds to redo the top end
head bolt corrosion is a big issue with this motor aswell.
The AMG M156 was the first engine fully designed and developed by AMG in house. It’s a truly wonderful NA engine, one of the best in the world in my opinion and the opinion of many others. It revs out so nice and sounds as only a big NA motor can. It’s actually quite American in the way it makes power, big displacement, big lunged, high RPM, NA engine unlike most of its contemporaries at the time that were downsized with forced induction. The 159 was a hot rodded variant used in the SLS and was the most powerful per cubic inch NA engine ever produced for passenger cars, I’m not sure if it still holds that title. As for the damage you found, anyone who knows the engine knows what most likely happened. First the worn through cam bucket is not an unheard of problem. AMG had issues with some of the buckets not being properly hardened which is why some engines have one bucket worn, other have more then one and still others will have no issues at all. AMG did have a fix but it was expensive. If you had an engine with worn buckets then you would need to replace all 4 cams and all 32 buckets. The cams were specific to this engine and would not work in any other engine, not even the 159. Occasionally the 156 suffered from head bolts that would stretch and break and AMG did release improved bolts. They’re also had some issues with intake manifold leaks and some PCV issues that could result in an annoying whistle sound or a check engine light or both. Despite all this though this is still an amazing engine that to few people ever got the chance to experience. It’s also a pleasure to work on and is very simple in its construction. Not all 156 engines would suffer from these faults and proper maintenance, as always, would greatly reduce the issues with the cam buckets. I can say with a good deal of certainty that this engine was not properly maintained. The worn cam bucket got to the point that the cam knocked the valve out of the head and it fell into the combustion chamber and the rest is history. That worn cam bucket made a lot of noise starting off as a very minimal tap mainly heard on cold starts, and slowly progressed to an extremely loud tap. The owner of this engine was either deaf or willfully ignored the noise. This engine was likely very high mileage as the cam bucket wear never showed up in low mileage engines. Proper maintenance might not have prevented the cam bucket wear but if the owner wanted to maintain the engine they would have fixed it long before it got to that point. Sad to see the fate that befell that engine.
This comment should win
This definitely sounds like what happened here, I wouldn't expect valve float with dual springs and a rev limiter that almost certainly kicked in before the point of float. If I recall the M156 is loosely based on the turbocharged V8 out of the Sauber C9/C11 race car from the late 80s/early 90s, that motor was pushing 1100+hp in qualifying and 900+hp in race tune, so this motor has some beefy bones.
"most powerful per cubic inch NA engine ever produced for passenger cars" In terms of torque perhaps but it's not even 100hp/L
cam adjusters are getting worn these days too
Last year I bought an ML63 with the exact same issue, also piston completely blown to bits. Bought the (very nice) car for a super good price, and found another engine. Did all the upgrades incl the headbolts. Love the car, and the m156 engine.
Send it to the poor bloke who put his name on the engine. Make it a full circle.
Not his fault that owners don't pay attention to oil in their performance car
@@TheUltimateEel It's not blame. It's closure.
@@TheUltimateEel It was not a lubrication problem..he stated.??? Why dit one specific can follower eat itself up and the others didn't ?
As per AMG, that motor was sapos too go back to the Gentleman that put it together. That's why his name is on it......
@@TheUltimateEel it not the oiling the problem us that bucket is supposed to spin when it stops spinning this happens there is a bucket with a special coating that helps this not happen.
That's a pretty cool giveaway idea. Only thing is UPS FedEx USPS might be a little jealous that it was already broken before they got their hands on it to throw it 😁
Ok this is a pretty good one 😂
Maybe, when they throw it, hear the crunch of parts.... they just nope, right the flip out of there! "It wasn't me!"
This better get the most likes, I lol'd hard at this one.
just received broken brake rotors from fedex, would love to have seen how they did that
You're lucky if they only throw it. Some of the packages I've received look like they were powerbombed repeatedly by the hulk and then gored by a feral hog.
Imagine the person who assembled this in the factory watching this video...... shedding a tear or two
I'm not crying! You're crying!
Dude, that block is TOTALLY salvageable! Just cut off those last two bores, and call it a V6.
@KZhead needs a Snickers its not complicated enough for VW to use
At GM it’s called 4.3 V6.
You Chief Engineer at Jaguar ??!!
@@-DC- If it was a Jaguar they would have left the block with all 8 cylinders, and just put a plate over the non working 2 cylinders.
Garage 54 did something like this to a Lada
I've seen AMG 63's for sale that make hellacious tapping noises. Some owners say "it's normal". It's not. They make noise when one or more tappets wear. The solution is to buy a set of SLS tappets, and if the engine has the early head bolts, replace those while the cams are our for the tappet swap. In this case, the tappet wore and started making noise LONG before this engine came apart. The noise was ignored until the fix went from moderately expensive, to "it's time to part out the car".
At first I was a little concerned that there wouldn't be any pew pew in this teardown. I'm satisfied now.
"non original inspection port". I laughed out loud, best description yet.
Yeah.... I call them "ventilated blocks" but this term definitely works as well! LOL. 👍🤣
Just need to find the right shaped welch / freeze plug and you're back in business.
Aftermarket PCV
"I've been browsing KZhead a long time, I should take a break. Oh look, a new teardown video!"
😂😂😂😂
-And likey (at current time of this comment) the winner (when it ends a week from now) of a batch of free parts!- someone else took teh lead
Never before has the phrase "the engine ate itself" been more of an accurate statement.
This should be the dictionary definition of 'grenaded'.
You didn't see the Silverado engine from last week... I'm a metal smith... it looked like casting shot, but not smooth.
heard someone comparing a 1UR in a Lexus to this in terms of reliability
"Why are they always shaped like this?" What other natural shape can you think of that moves fluid that well in a controlled fashion?
There's a joke in here i just know it
i think it's call a volute.
@@DJCuhhhstin956 there is
02 Toyota Tacoma 4.0 water pump gasket. Go look it up everyone. Better yet, call your local parts store and have them describe the shape to you!
@@T..C..M LOL, that's pretty funny.
A guy in northern Germany is a Mercedes expert and he has a very good youtube channel "Motoren Zimmer". He shows his shop and explains on customers cars their faults and how to prevent them. He numerously showed this type of motor (V8 6.1 AMG and similar) heaving problems with the hydraulic lifters. The lifters get a dent and the cam lobes are rounded. I can't remember the reason for the dent, but in the end the cam lobes get as round as shown here and groove out the lifters. Here, most likely, the lifter surface wore down and broke apart, then the cam lobe directly pushed on the valve. At this stage you would have heard a bad sound from the engine. Then, by running it, the top of the valve got worn down, until the spring retainers from the valve popped out and the valve fell into the cylinder, braking off and destroying the other two exhaust valves as well as the piston. You can see from the good journals that this probably was not an oiling issue. I believe Mr. Zimmer always says that it comes from too few oil changes, but I would have to check on that.
www.autoblog.com/2011/09/22/class-action-lawsuit-to-be-filed-against-mercedes-alleges-amg-v8/ The lifters were supposed to rotate as the engine ran but sometimes they would seize and no longer rotate, focusing the wear in just one spot. The early years of the M156 6.2L also had issues with headbolts. The VVT phasers would also wear and develop a typical phaser rattle. The fuel injectors had issues with sticking open too.
Had a couple of issues like this when I was at the dealer too, none as catastrophic as this thankfully just a ticking complaint. Always upgraded the buckets and to SLS black series buckets and it was a pretty pretty penny for that RO. Sometimes have to replace the cams too
I wish there was a youtube video just before he nailed the throttle and said, "dude, watch what this car can do!" and right after his buddy saying, "dude, you dad is going to be pissed!"
"What was that sound?" Dunno dude, just turn the radio up.
Former M156 owner. Great vid. Early M156 engines suffered from cam and lifter wear. They also suffered from headbolt failure. This car definitely had the cam wear through the lifter, eventually causing catastrophic engine failure. I had an early engine but replaced the lifters and headbolts with updated parts to prevent a failure.
Do you know the part number of the updated bucket?
@@bananegrau5642 youtube keeps dropping off my part number for some reason one more try.
@@bananegrau5642 M159 BS buckets. 1590500000. M156 updated buckets 1560500225. Either works but the 159 BS buckets have an antifriction coating.
to be honest Im planning to get a used c63 and just de construct the engine and check for the headbolts and cam lobes. Better paying for those than destroying the engine block itself.
It’s amazing to see such highly engineered engines working at their peak capacity. It’s equally amazing to see what happens when they choose to stop working.
Gotta love that " hand crafted" nomenclature on a blown engine
Precision transmission : check Ron Pratt : check Matt's off road recovery : check I do cars : CHECK ! Great way to start the weekend 👍
Matt's off road recover is awesome.
@@TheMastadon1 yes it is
You forgot Bus Grease Monkey.
@@unavailablenumbers not sure who that is . Never watched .
Vice grip garage
I think it would be pretty cool to get the box, in my younger years I used to own and build SEVERAL euro engines. On deployment I even got to got to the Mercedes assembly plant and see those engines be assembled. BY HAND. It was amazing
This engine reminds me of myself at 2:30 am Saturday night after epic pub crawl...piston broke.
You said oil consumption was fine. But it seems to have a slight increase in piston consumption.
And valve consumption. Just needs a top-up.
Hans the engine builder was crying when you pulled that oil pan!
This is one of those rare engines with the piston delete option for fuel savings.
dang -- I can't imagine how that engine sounded b4 it finally gave up. Hurts to look at. I'll get over it -- tnx for sharing.
Anybody else hearing an AMG tech sobbing and rocking back and forth watching this?
As a GM and all-around American car manufacturer enthusiast, I don't care much for german engineering but that engine teardown was quite entertaining and a learning experience. Can't wait for another Mercedes engine teardown.
so glad you found the valves...was worried you'd have to junk the engine
70% of that engine is junk. He got 12 valves, 6 pistons, and 2 cams out of it. The heads, oil pump, and short block are toast.
@@denniscrider3776 scrap money.
Great video man. Thanks for showing what happens when you ignore the M156 ticking, and how improper oil change intervals can cause irreversible damage!
That was Brutal but nice to see that it mostly held together. Been enjoying the teardowns keep up the good work.
I look forward to these videos every week! Thanks for sharing another engine tear down!
“I’m pretty sure this block is going in the aluminum bin. I can’t think of anything else it would be good for.” Sounds like a candidate for an AMG 4.7L V6.
Grab the angle grinder, we're going to find out how hard a 3.1L slant four vibrates...
@@creepingjesus5106 I believe Chrysler already figured that out for you in 1962. Turns out, it's not good.
@@T..C..M I wondered after I wrote that whether the 3.0L four banger in the Porsche 968 counted! They had a decent stab at it, but even they had to admit it wasn't going to get much further. Even with balancer shafts, computer controlled combustion and much better machining tolerances than Chrysler had on hand back then, about 2.5L seems to be the practical limit for N/A fours.
they never made an 4.7 v6
It would be great if at the end of every video you could show a pile of salvageable parts vs a pile of scrap for meltdown. Loving the teardowns and detective work.
I know you were bummed, but thank you for these intriguing videos!!!
Just got done with the gnarliest day at work. This is helping me come down from that. Thanks buddy 👍
Not sure if my comment will get any likes or not. I sure would love to have those Mercedes parts! I really enjoy watching your videos. It’s fun watching how you attack new and different engines that you haven’t worked on before. I was really excited to watch the Mercedes teardown. I’ve got a Mercedes E550 Coupe, but mine is babied and will never end up like that one! It’s always amazing how such an expensive and well-made engine can be blown apart. I feel sorry for the owner; unless his foot was in it or he (she) was doing something he shouldn’t have been doing! Hopefully no one or nothing was harmed when the engine blew!
156k miles on my E550
I'd really like to hear what one of these sounds like when they self-destruct. I know when the connecting rod in my lawn mower came apart, it made some interesting clanking and banging. Having an entire piston being broken into little pieces must sound... intense, lol...
Great video on the M156 tear down, just came across this video tonight .great job
Another great video, thanks Eric, much appreciated.
Son: Daaaaad, the Mercedes is making a strange noise. Dad: What did you do? Son: Nothing
And for once he’d be right xD
This motor gave nothing but telltale signs of the coming disaster for years and were clearly ignored.
@@kbcarroll signs like what? Just curious
@@trizkial7592 lots and lots of very concerning rattles and tapping that any mechanic would've thrown up red flags for
@@kbcarroll I think a sound like CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK CONK Would've been one sign.
I feel like I should be paying something for the entertainment and educational value of these videos.
Just discovered this channel and I am really liking it Subscribed and will continue to watch
Dude this is some pretty cool work! Definitely wanting to get more into engine tear-downs and the works. I'd love to come by your shop sometime and watch you do an engine tear down, I'm also in the St. Louis area
The wear on the cam and bucket tell me that the cam wore through the bucket and released the valve into the piston and destroyed everything from there.
Known issue, camshaft and lifter interface wears, lifter stops rotating, accelerated wear occurs, eventually hydraulic element gets stuck sideways, valve stays open, interference occurs. Rest is history. A cascading failure.
Thanks for taking the time to edit all you do. I like that you show the disassembly mostly in full and speed up the repetitive parts. I’m sure it would be much easier to just say, “now we’re going to remove the exhaust manifold” and either leave it unedited or just cut to, “now that that’s out of the way”. Even the camera positioning that lets us see while you work is probably a pain. So just wanted to say thanks for the extra effort.
Never seen an engine with such damage being contained like that. Usually that would set up more of a catastrophic cascade resulting in inspection ports everywhere! A testament to Mercedes craftsmanship and engineering
I keep forgetting this channel is so small. You're going places here man.
I feel like Alex from Legitstreetcars would appreciate this.
Alex would probably cry if he saw this.
These are intriguing videos!😁. Addictive!
Fantastic channel Eric! Keep it up.
I would be willing to bet money that this was from an over-rev. Likely some doofus tried to force a down shift when the rpm's were too high. Valve floated, keepers let go, and the rest followed to destruction. I will say I am impressed myself with how the destruction was contained to just the front.
This was a known problem with the M156, to the extent that there was a class-action lawsuit: the cam wears through the tappet, eventually the valve drops, and it's showtime.
Interesting, wonder if the original owner got comped a new engine to replace this one?
You mentioned "why are water pumps always shaped like this?" Are you referring to the head, shaft, or the balls of the water pump?
Hey man, just found your channel with this video. No frills repairs and diagnostics and is some good asmr shit. Great stuff to watch someone do what they do when I have no idea what is happening. 🤙
Top notch tear down 👍👍👍👍👍👍👍👍
"Hi, we've been trying to get in touch with you about your cars extended warranty."
I’m speechless that someone could treat an engine like this, especially one which was more than the price of an average car. The wrong people are rewarded in life.
What are you talking about? You don't know how this engine was treated.
@@bobvance- - perhaps they mean that they don't like seeing it disassembled to determine the reason for the failure. Gawd knows who _"the wrong people are"_ who get _"rewarded in life"_ ??
I've got this engine in both my 2009 W219 CLS63 AMG and my 2010 W212 E63 AMG and I absolutely love it ! It sounds so brutal when you rev it ! - The M156 has got to be the nicest and best engine Mercedes ever made (with the help of AMG)
I just picked up a 2010 E63 AMG. I've been wanting this motor for years. It's about to get new cam adjustor plates (upgraded) and will see what the can lobes/tappets and head bolts look like. Love the car, wish me luck.
@@SkywardOne Congratulations ! I've now had mine for just over 2 years and apart from the gears not staying switched in sport mode I still love this great car and that sound when you step on the gas hard !! - Enjoy your E63 - They are fabulous cars and don't rust unlike the 2009 CLS63 I once had which had blisters on the front wheel arches ! - Best of luck man.
You know Sir, I just subscribed to your channel yesterday; I'm very impressed by the way you present your videos. Don't change a thing new listener from N.E. Ohio.
This is a beast of an engine, up there with the LS7 and F22C as the swan song of NA engines.
Yee the german V8. I wonder why we even try to reinvent the V8 constantly when that crown of Best V8 Engine period goes to the LS.
BEAST IN BLOWING UP AND CHEWING IT'S GUTS OUT
It appear that Mercedes VVT is more of a variable valve trimming
Excellent review
"Non original inspection port" is gold. Thank you!
"The best, or nothing" - Mercedes Motto. In this case, nothing would be better!
The best is not mercedes
mercedes doesnt have anything to do with it. it was the idiot owner
@@shadowopsairman1583 it depends how you look at it. you can get a lexus that's gonna last forever but it will only make 25hp. u might as well push the damn car uphill
"Why are they always shaped like this?" Just most vehicle engineers putting a bit of their personality into their projects!
That engine was engineered phenomenal. The cool part is that it was contained and did not spread to the other cylinders
These engine tear down vids are very cool, you got a subscriber!
Can you do a video on on how you organize all the usable parts for resale? Seems like an impossible task.
I'd always wondered what the Star Wars "Pew, Pew, Pew" (18:15) special-effects would sound like if I switched the audio track to Dolby "AMG German". ;D
I'm sorry, but I laughed so hard at your funny comments - what really keeps me hanging and enjoy all your videos. AND getting educated of course.
"non-original inspection port"....gold!
I wonder if the person who built this engine is screaming "why must you destroy my engines!" In german somewhere.
Exactly. That thing was protesting for quite a while.
In German: Warum hast du meine Maschine kaputt gemacht?
@@derbuschmann3604 "Nimm dei Griffel von meim Motor!" ;D
I swear i could see how Scotty Kilmer would be about to burst a vessel screaming ENDLESS MONEYPIT while watching this Merc engine lol
Scotty has been delusional for years now with his absolute RIDICULOUS clickbait.. He should understand by now that the vast majority of people that buy German cars do exactly as he says and leases them or are 100% understanding of the extra maintenance and cost that they come with. An Mercedes engine like this is usually the exception rather than the rule because their owners tend to be meticulous on maintenance. Scotty saying German cars are "unreliable" is not true. They are very reliable if you maintain them. Literally any car will break if you don't maintain it, even his precious Toyota's. I know you probably know this but seeing Scotty's name just got me worked up because I used to like him before his clickbait BS lol. Funny comment nonetheless. +1
Ey awesome finally we can see the insides of a Mercedes AMG V8 and how do they make their magic.
Really enjoyed this video
It's the very first free valve Mercedes engine! 🤣
Not free valve. Valve free! :)
Other you tubers: I'm giving away a free car I Do Cars: I'll send you useless obliterated parts. Nobody:
At least you can hang them on the wall in the garage!
@@hdezn26 yeah, because free cars you can't do anything with
That looks like some high quality blunderbuss ammo
never seen an AMG engine this destroyed, amazing
But it’s German, I’m pretty sure those broken parts need to come with an ecu!
You should try to contact the guy that built that engine and say, "C'mon man " .
😂😂😂
Oh yes I’ve been waiting a long time for this video👍🏻
It's like all these engines are all the same , but still they are all different from each other . Enjoy looking at you taking these apart . Thanks
"My Dad is a Television Repairman, He has the ultimate set of tools".
I am a television repairman and I have an ultimate set of tools!
I’m surprised AMG doesn’t require or at least encourage failed motors to get returned directly to the factory for research purposes
And not only for research, but to see where their product is failing so they improve it. You pay enough for their stuff so they need to see that not all is well.
It's after the first lease return, so they aren't interested.
@@matthewbowen5841 Yep they got their money they don't care. Rich idiots will buy no matter how bad the quality gets. Most of them only have it to flex, they don't care or know anything about cars.
Pretty impressive engine damage ( destruction ) as always great video content 👌
I do the same thing with motorcycle engines , im constantly rebuilding engines my mates have blown up It's always fascinating to me to see the damage when I open them up Keep up with the videos ,always a good watch :)
Race bikes or dirt bikes? (4s or singles/twins?)
@@Me-zo8yc Road bikes mostly , singles , twins and 4's , but I've also just done a wr426f engine where the piston decided it wanted to go up the barrel sideways xD
@@MadmanMarsBar 😆 nice. At least 2 strokes were simpler to rebuild!
“Piston delete” becomes “engine delete!!” “… let’s see if that guy can do 88 - in SECOND gear!”
It's my birthday! I want an engine part!
Excellent Video Man 😀🤤😀👍🏼 Loved it Like All The Rest 😎😶🌫️😵💫
Wow...this is impressive.
I would like to have some broken Parts of it, because i could show it to my friend, who is a big Merc-Fanboy...
To be fair, this is the only engine completely designed and built by AMG. Actual Mercedes engines are far less likely to pop like this. AMG had way better results when they were just squeezing more power from Mercedes motors.
@@kbcarroll 290k km on my m156
@@multiblade04 awesome! Take care of it! 313k miles on my 1999 C43 AMG
Mercedes hard-parts huddle together when they get spooked. Typically in the oilpan. Like livestock.
After watching several of your videos, I'm ready to make my next vehicle all-electric. (Fewer moving parts.)
Love the fast forward sound of the power tools. Wish all mine sounded like that. :)
Mercedes engineers thought HLA stood for "Hella Loud Annihilation"
Looks like it dropped a valve from a failed retainer. I had that happen to a shim under bucket arrangement like this on a motorcycle and the damage looked quite the same.
@KZhead needs a Snickers That's how mine failed. The engine was a Kawasaki Z1 with a welded crank, 10.5:1, and Ti retainers on the valves. Regularly revved it to 11,000 with a stock redline of 8500. Can't understand why the valve dropped. Caused quite the destruction, completely blew my piston out as well.
@KZhead needs a Snickers Friend had an 80, best sounding bike ever made. I wrenched at a Honda dealer in the 80's, I hated them lol. 24 valves to shim and 6 carbs to tune and synch.. I got pretty good at it.
@KZhead needs a Snickers Yes they were, serviced a few transmissions as well. Running the valves was an exercise in patients, the only relief was no radiator in the way.
Love teardown videos.
Such an informative video