M156 head bolt problems
MBWorld Fanatic!
Joined: Feb 2003
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From: Vegas and Vancouver, BC
.
Does anyone know if the engines made post-60658 include the replacement of the M156 valve buckets with the M159 (SLS) buckets?
The early cam lobes are made of a softer material than the buckets and the cams wear the entire time the engine is tapping. The fix is to replace the M156 valve buckets with the M159 (SLS) buckets. Do the post-2011 engines have this fix?
The early cam lobes are made of a softer material than the buckets and the cams wear the entire time the engine is tapping. The fix is to replace the M156 valve buckets with the M159 (SLS) buckets. Do the post-2011 engines have this fix?
Member
Joined: Dec 2007
Posts: 156
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From: OH
2017 Audi R8 V10 Plus
After reading through several pages, I saw someone asked this same question but I didn't see if it was answered.
It seems all the warranty work was done through MB but has anyone had it done through a 3rd party warranty company?
I'm looking at a 2007 E63 with around 55k miles. I'd definitely buy an extended warranty of some type but I'd like to know if something like this issue would be covered if the worst happens.
Thanks in advance.
It seems all the warranty work was done through MB but has anyone had it done through a 3rd party warranty company?
I'm looking at a 2007 E63 with around 55k miles. I'd definitely buy an extended warranty of some type but I'd like to know if something like this issue would be covered if the worst happens.
Thanks in advance.
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Joined: Mar 2012
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From: Walnut Creek, CA
Vivid Racing '09 C63 AMG
I think I remember reading it cost someone $5k altogether. If you get the bolts from Weistec, I think they were like $1300, so the rest would be labor. I don't think that included buckets.
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C63 AMG
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Joined: Jun 2013
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S550 on order
Ehh not to bad
...I had to replace the intake manifold on my car and that alone was 4k!!! you guys make this headbolt issue sound like it costs 10's of thousands :P
Member
Joined: May 2013
Posts: 106
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2007 E63
FYI on my head bolt failure and fix for my E63. Also includes an update on the head bolt conditions.
https://mbworld.org/forums/w211-amg/...bye-bye-2.html
https://mbworld.org/forums/w211-amg/...bye-bye-2.html
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From: California ,Oregon, Idaho
AMG GTR, GTBS,944 Turbo, GT4RS,GT2RS,GT3rs,GT4,Lotus Exige S,BMW M3CS,M4CSL,Lamborghini STO, Tesla Y
i could not agree more with you. people way over react its as if this was the only car to have a head leak.
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Joined: Aug 2009
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C63 AMG
An update: statepkt is sending me some faulty head bolts. motoman and I in our own separate ways intend to bring some real information to the issue of "why" via "real-science lab testing." We're going about it in different ways so the results will be out there at different times but they'll be coming. We need more corroded head bolts from different M156 engines though, so any of you who have them around and can part with them, well please PM me or motoman...much appreciated.
Last edited by bhamg; Sep 11, 2013 at 06:22 PM.
Senior Member
Joined: Jul 2011
Posts: 344
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From: Battle Ground WA
C63AMG, NIssan NX2000, Pontiac Fiero GT
I have noted some lack of cross pollination among the sub forums and have visited the using M156 engine sub-forum sites and asked for any failed AMG 6.3 engine headbolts. Labs have asked me for samples and pictures and there are not enough to go around. Please help before AMG escapes via all- turbo engine design and shines on the bad headbolts as routine maintenance. 
Senior Member
Joined: Jul 2011
Posts: 344
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From: Battle Ground WA
C63AMG, NIssan NX2000, Pontiac Fiero GT
Very interesting shot of statpkt broken bolt. Severe pitting looks like water soaked, not crevice corrosion. Perhaps "soaking" is due to age of car, 2007? Water or depleted coolant driven by system pressure past the "unsealed" threads in the bloc. We are close, I hope, to professional analylsis.
MBWorld Fanatic!
Joined: Aug 2009
Posts: 2,899
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C63 AMG
I have noted some lack of cross pollination among the sub forums and have visited the using M156 engine sub-forum sites and asked for any failed AMG 6.3 engine headbolts. Labs have asked me for samples and pictures and there are not enough to go around. Please help before AMG escapes via all- turbo engine design and shines on the bad headbolts as routine maintenance.
Senior Member
Joined: Jul 2011
Posts: 344
Likes: 5
From: Battle Ground WA
C63AMG, NIssan NX2000, Pontiac Fiero GT
I completed the requests for broken M156 headbolts within ML63, R63, S63,CL63,CLK63, and SL63 sub forums. What's with E63 and CLS63...says they moved so I did not post there. The E63 , especially , is needed.
I can see, as bhamg has, that availability of failed bolts will slow this study . In my case I am requesting quotes, and based upon potential tests the labs may need several. Sniff 'em out and send 'em please.
I can see, as bhamg has, that availability of failed bolts will slow this study . In my case I am requesting quotes, and based upon potential tests the labs may need several. Sniff 'em out and send 'em please.
