Coolant usage-may be the "bad news"
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C63 AMG
Another update-
They are reporting one head bolt had failed and another had area showing corrosion.
I certainly would reccomend watching this on the '09 MY vehicles. In my case there was no early signs, just an immediate change to what had been a normal ownership experience.
I would never recommend reusing head bolts on any rebuild, but especially if you are going into one of these motors for modifications, I would definately replace all of the headbolts with a superior fastener. Most who do this type of work already know this.
If there is someone that has information regarding the TSB on this, we might know the range of affected vehicles.
They are reporting one head bolt had failed and another had area showing corrosion.
I certainly would reccomend watching this on the '09 MY vehicles. In my case there was no early signs, just an immediate change to what had been a normal ownership experience.
I would never recommend reusing head bolts on any rebuild, but especially if you are going into one of these motors for modifications, I would definately replace all of the headbolts with a superior fastener. Most who do this type of work already know this.
If there is someone that has information regarding the TSB on this, we might know the range of affected vehicles.
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2009 C63
Might be a dumb question but does anyone have a PN for this head bolt or gasket? I recently took my car in for my 50k service, as i was driving home i had a CEL come on.. I took it in a couple days later, the CEL was gone but I asked them to check it anyway. they fixed/replaced and METAL SEAL and SCREW. This is a long shot but does this have to do with anything discussed above?
PN 156-141-04-80 METAL SEAL
PN 004-990-53-12 SCREW
^ from my invoice, covered under warranty
Also, it's an 09, ~50,0XX miles..
PN 156-141-04-80 METAL SEAL
PN 004-990-53-12 SCREW
^ from my invoice, covered under warranty
Also, it's an 09, ~50,0XX miles..
Last edited by drawde; Apr 20, 2012 at 05:22 PM.
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C63 AMG
The cause of head bolt failure looks increasingly to be a case of the metallurgy involved. The factory torquing procedure as described by Merc63 would seem to eliminate the chance of overtorquing. Certainly the torque value should put the head bolt well within its elastic limit. What else can it be?
Might be a dumb question but does anyone have a PN for this head bolt or gasket? I recently took my car in for my 50k service, as i was driving home i had a CEL come on.. I took it in a couple days later, the CEL was gone but I asked them to check it anyway. they fixed/replaced and METAL SEAL and SCREW. This is a long shot but does this have to do with anything discussed above?
PN 156-141-04-80 METAL SEAL
PN 004-990-53-12 SCREW
^ from my invoice, covered under warranty
Also, it's an 09, ~50,0XX miles..
PN 156-141-04-80 METAL SEAL
PN 004-990-53-12 SCREW
^ from my invoice, covered under warranty
Also, it's an 09, ~50,0XX miles..
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Metallurgy...that really would make this a time bomb that might eventually affect a large number of vehicles. These bolts would have been made by the supplier in a quantity (batch) sufficient for a large number of motors as well as for parts stock. While I'm not normally one to shout "recall" anytime something happens perhaps we might be edging towards that scenario.
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AMG GLC63. Audi R8
If the head bolts are the culprit, what is the possibility of replacing them with stronger bolts (assuming the factory bolts are flawed) in reverse order before a failure occures? Would the heads loose the seat with the head gasket or even worse cause a head to warp replacing one bolt at a time? I've not pulled a value cover off, can you even get to all the headbolts with the valve actuators and cams in place? If possible this would be a relatively less expensive form of preventative maintainance the waiting for a head bolt(s) to fail.
Last edited by DuaneC63; Apr 22, 2012 at 02:45 AM.
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If the head bolts are the culprit, what is the possibility of replacing them with stronger bolts (assuming the factory bolts are flawed) in reverse order before a failure occures? Would the heads loose the seat with the head gasket or even worse cause a head to warp replacing one bolt at a time? I've not pulled a value cover off, can you even get to all the headbolts with the valve actuators and cams in place? If possible this would be a relatively less expensive form of preventative maintainance the waiting for a head bolt(s) to fail.
Im pretty sure the cams are in the way for a few of the head bolts... Sucks
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2009 C63
Metallurgy...that really would make this a time bomb that might eventually affect a large number of vehicles. These bolts would have been made by the supplier in a quantity (batch) sufficient for a large number of motors as well as for parts stock. While I'm not normally one to shout "recall" anytime something happens perhaps we might be edging towards that scenario.
We may be then able to identify a certain manufacturing date or group that should be watched.
If this were 1980, I would doubt any manufacturer would bother worrying about this issue, but given this engine is used throughout the line in the high-end products I believe it a wise investment for the factory to warrenty these engines, and their repairs, for an extended period, if only to assure future customers of their confidence in these products.
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If the headbolts are the common denominator, there would be a compelling argument that some sort of assistance should be given. It would be prudent to collect all of the major repairs would and attempt to identify trends. We may be then able to identify a certain manufacturing date or group that should be watched.
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05 ML-500 , 03 CLK5.5 AMG has left the Garage
BOY I nailed this one On Benx Boost
I posted this 9/10/2011 , but nobody paid much attention, Oh Well And good luck
So How does this motor get such awards & accolades ?? for being a ? best in class engineered motor. The 1st gen had no way the control the gear lash between the intake & Exhaust cams, got some gear noise !! The cams where made to a spec that is used through out the automotive industry ( Chilled ? Gray hi nodular cast Iron ) the buckets show wear not so much that the steel that was used , but the position of the cam offset was wrong & possible the lobe was not ground right to help spin the bucket. May You notice that most of the noise came from the left / drivers side valve cover. There was a time you could not get a replacement head for that side . Here is another surprise for you. have you seen were the Head of the cylinder head bolts on these motors ,just pop off. IT'S out there and coming your way soon, I call it , **** poor quality control from the vendor. No guards to protect the manufacture that uses these bolts. Get get this motor a little hot or some milage you got a Issue. And they built 1000s of these motors. The cylinder head is a manufacturing Issue within AMG. as Most issue have been corrected . To this point it , The head bolt issues still leaves some of you guy's cold and out on the street with a large bill . Cheers _PTEngineering
So How does this motor get such awards & accolades ?? for being a ? best in class engineered motor. The 1st gen had no way the control the gear lash between the intake & Exhaust cams, got some gear noise !! The cams where made to a spec that is used through out the automotive industry ( Chilled ? Gray hi nodular cast Iron ) the buckets show wear not so much that the steel that was used , but the position of the cam offset was wrong & possible the lobe was not ground right to help spin the bucket. May You notice that most of the noise came from the left / drivers side valve cover. There was a time you could not get a replacement head for that side . Here is another surprise for you. have you seen were the Head of the cylinder head bolts on these motors ,just pop off. IT'S out there and coming your way soon, I call it , **** poor quality control from the vendor. No guards to protect the manufacture that uses these bolts. Get get this motor a little hot or some milage you got a Issue. And they built 1000s of these motors. The cylinder head is a manufacturing Issue within AMG. as Most issue have been corrected . To this point it , The head bolt issues still leaves some of you guy's cold and out on the street with a large bill . Cheers _PTEngineering
Last edited by PTE; Apr 23, 2012 at 09:01 AM.
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05 ML-500 , 03 CLK5.5 AMG has left the Garage
BOY I nailed this one On Benx Boost
No Wonder I didn't get many responses on BB. I have ADHD really bad some days.
Sorry & Thanks for the spell check
_PTEngineering
Sorry & Thanks for the spell check
_PTEngineering
Last edited by PTE; Apr 24, 2012 at 01:39 AM.
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C63 AMG
From the ongoing reports of sudden coolant loss I figured the failure of the head bolt had to have been of a catastrophic nature, but it still boggles the mind to think the bolt heads just break off suddenly...not a comforting thought going forward.
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C63 AMG
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2015 C63S E1 (sold 2012 C63 AMG Sedan (Premium & APX)) & 09 C300 Sport 4Matic
Found my engine number on my original window sticker which I kept.
My MY2012 is way more than 10,000 units over #060658
My MY2012 is way more than 10,000 units over #060658
Last edited by Pit-Pony; Apr 24, 2012 at 06:19 PM.
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