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We all agree the original bolt was poorly designed. But I believe the reason the failures are relatively rare, is that one or more batches had either metallurgical or post manufacturing treatment issues. This would help explain why the failures occur at different times in the life of an engine, and would also make it hard to track where the parts got used.
Now that's a theory I've never heard before. Interesting.
hey thanks for your quick reply! I was set on doing the head gaskets till I went through your thread so that is why I posted this one! How many kms have you put on it so far? I am
Still on the fence since it is parked for the winter so I got the time just knowing that I'm wasting extra money and time kind of bugs me. But the head gasket is pretty much the reason I'm taking the engine apart.
Wow, you're a spunky little ***** aren't you? Here's the thing, yes, mfg change things l the time, however, they don't change the pressure holding components in a 60 million dollar engine design if there is no issue with it...also, why exactly do you think most times(at least in the past) when head bolts went the dealers and MB were usually willing to at least foot half the bill? It was a **** poor design to begin with, removing material from the inner structure of a fastener, especially one which is tasked with one of the harshest loads the engine will ever see. Couple in the electrolysis factor creating corrosion, big chunk of metal with constant high amperage current flowing through it filled with moving coolant, and it is not an if but when. I have been here a while, other boards as well, and I honestly think you are the first moron I have seen hit this topic with the "if it ain't broke don't fix it" comment. I expect this type comment on a BMW forum but come on guy, you're better than that.....
Lmao the first part of this makes me laugh everytime
hey thanks for your quick reply! I was set on doing the head gaskets till I went through your thread so that is why I posted this one! How many kms have you put on it so far? I am
Still on the fence since it is parked for the winter so I got the time just knowing that I'm wasting extra money and time kind of bugs me. But the head gasket is pretty much the reason I'm taking the engine apart.
KM?
I've put on just about 5k miles (~8k km) and all is well.
'04 E55 (Gone but not forgotten), '13 C63 P31 (RIP), another '13 C63 PP
So... Post 2011.5... Did the valve buckets get updated along with the head bolts..? Wanting to know if it's worth paying Weistec for the M159 buckets plus whatever labor it is to install them... My car is a 2013 btw..
So... Post 2011.5... Did the valve buckets get updated along with the head bolts..? Wanting to know if it's worth paying Weistec for the M159 buckets plus whatever labor it is to install them... My car is a 2013 btw..
The valve lifters also went to a different design, I believe in 2012. Some people here have experienced noise (which is wear) with the older design.
since replacing my lifters, honestly this is something i think is over diagnosed and in most cases is actually the cam adjusters. they probably get gummed up and their locking pins don't fully engage allowing for some movement which is causing the clickity clack. if one were to replace their cam adjusters i'd honestly look into possibly opening up the items and mirror polishing them. as so they move freely when oiled.
W219 MY'07 CLS63 Passenger side Head Bolts
I just had my passenger side done today, with the one-bolt-at-a-time method. I'll have a little write up when i'm done with the driver's side tomorrow.
Honestly my bolts look pretty good. I wonder why some of the head bolts we see online have corroded so badly. Anyhow still glad they are now replaced, gives
me peace of mind...
W219 MY'07 CLS63 Passenger side Head Bolts
I just had my passenger side done today, with the one-bolt-at-a-time method. I'll have a little write up when i'm done with the driver's side tomorrow.
Honestly my bolts look pretty good. I wonder why some of the head bolts we see online have corroded so badly. Anyhow still glad they are now replaced, gives
me peace of mind...
How many miles? How often has the coolant been changed?
My mechanic said my bolts looked brand new when he removed them as well. 2007 E63 with 117-120k at the time. Changed my coolant twice during my 3 years of ownership.
I just had my passenger side done today, with the one-bolt-at-a-time method. I'll have a little write up when i'm done with the driver's side tomorrow.
Honestly my bolts look pretty good. I wonder why some of the head bolts we see online have corroded so badly. Anyhow still glad they are now replaced, gives
me peace of mind...
Originally Posted by hachiroku
My mechanic said my bolts looked brand new when he removed them as well. 2007 E63 with 117-120k at the time. Changed my coolant twice during my 3 years of ownership.
Guys, what is the serial number for your engines? I have a theory that I am willing to share if it proves to be correct.
Sales designation:E 63 AMG Order number:0 7 714 70012 Delivery date:09 08 2006 Market: NA,North America Production order:N Engine no.: 156983 60 003148 Major assembly variant: A 156 010 51 00 Part var. design.: Text
The consensus is that it was likely a metallurgy defect in a production of prior design bolts. It's quite possible older E class engines with the old design didn't have the corrosion problem.
I think that engines up to 60024801 might be safe, and the defect starts with engine 60024802 all the way to 60060658.
If you look at the bolt revisions at EPC you will notice that the first two parts are used in engines up to 60024801, 10/12/2007. With the second revision having the note "FIRST EXHAUST STOCK OF OLD PARTS" . Only the 3rd revision has a note not to use it anymore.
So what if the head bolt issue occurs for cars having part number A1560160669? While A1560160369,A1560160469, and A1560160769 are safe.
If you look at the TSB L101.30-P-051567, it mentions "engines up to 60060658". They won't specify that engines up to 60024801 are safe, because if these engines prove to be defective, 24,801 customers could sue Mercedes/ AMG for false or misleading information.
How many miles? How often has the coolant been changed?
Has about 68K miles. I got her 1 year ago @ 55K miles. Changed 3 times including this time.
3 bolts from driver's side exhibited some corrosion. Glad I got them out. Would have been safe for another few years
down the road, but you can definitely see the corrosion starting to set in.
Engine no.: 156983 60 016698 Major assembly variant: A 156 010 51 00
strange that you guys have silver old style bolts. the ones I pulled from my 2010 were black/brownish. some corrosion had started to set in near the head. I no longer have the bolts, but I had 88k on mine. I am glad they are no longer in the car. my valvetrain showed almost no wear (replaced lifters anyways).
strange that you guys have silver old style bolts. the ones I pulled from my 2010 were black/brownish. some corrosion had started to set in near the head. I no longer have the bolts, but I had 88k on mine. I am glad they are no longer in the car. my valvetrain showed almost no wear (replaced lifters anyways).
What's your engine number?
Edit: Mine were dark as well. Engine #: 15698560050056. This was my worst one...
I think that engines up to 60024801 might be safe, and the defect starts with engine 60024802 all the way to 60060658.
If you look at the bolt revisions at EPC you will notice that the first two parts are used in engines up to 60024801, 10/12/2007. With the second revision having the note "FIRST EXHAUST STOCK OF OLD PARTS" . Only the 3rd revision has a note not to use it anymore.
So what if the head bolt issue occurs for cars having part number A1560160669? While A1560160369,A1560160469, and A1560160769 are safe.
If you look at the TSB L101.30-P-051567, it mentions "engines up to 60060658". They won't specify that engines up to 60024801 are safe, because if these engines prove to be defective, 24,801 customers could sue Mercedes/ AMG for false or misleading information.
Was there every any validity to this theory? Sorry for digging up an old thread.
11-30-2017, 06:54 PM
