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View Poll Results: M156 head bolt data poll
0-20k miles
8.59%
20-40k miles
25.78%
40-60k miles
28.91%
60-80k miles
15.63%
80-100k miles plus
18.75%
Head bolt failure
2.34%
Voters: 128. You may not vote on this poll

M156 head bolt data poll

 
Old 09-30-2014, 07:40 PM
  #1  
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C63 AMG
M156 head bolt data poll

In search of some data I submit this poll

Please respond to the poll ONLY if you are in the affected range
If in doubt use MY's 2010 (inclusive) and older as a guideline
Do not make any additional posts ( only post if you had a failure) tia

If you have NOT had a failure only select your mileage from the poll

If you HAD a failure select HEAD BOLT FAILURE
Do so only if you know for certain a bolt(s) were broken: picture, personally observed or an invoice

For those who experienced a failure please ALSO make a post with only the following:
Mileage
Number of bolts failed (if known)
Cost of repair
MB contribution (if any)
Engine modifications (if any)
Attach invoice or pictures
Omit any info you are not comfortable sharing

Thank you
Let's try to keep this on point and only populated with the relavent data

Mods: might be helpful if made a sticky and cross linked to all forums with cars using the M156


PLEASE PARTICIPATE!!! Thank you
If you are a visitor please join and vote!!!!

Last edited by Ingenieur; 09-30-2014 at 08:37 PM.
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Old 09-30-2014, 07:53 PM
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2010 C63 AMG
I'm at 81K km. No coolant usage (knock on wood) so far. Generally check once a week.
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Old 09-30-2014, 07:59 PM
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Originally Posted by Jasonoff View Post
I'm at 81K km. No coolant usage (knock on wood) so far. Generally check once a week.
Thanks
But let's only post if you had a failure
I want to keep it clean and simple to generate a database
Don't mean to be a pita lol

I see I wasn't very clear about that, sorry

Last edited by Ingenieur; 09-30-2014 at 08:04 PM.
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Old 10-01-2014, 12:36 AM
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E63S | X5
Should just edit the sticky that has hundreds of pages to include a pole
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Old 10-01-2014, 01:36 AM
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C63 AMG P30 *EuroCharged*| Porsche Cayenne | Buell XB9SX
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Last edited by m a x i m u s; 10-02-2014 at 04:21 PM.
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Old 10-01-2014, 11:42 AM
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C63 AMG
to the top
come on people!
100's of owners around this joint


as far as merging it with the other thread, I really don't want it lost in the noise
I'd like to get some hard data with a reasonable confidence interval
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Old 10-02-2014, 08:06 AM
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TtT
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Old 10-04-2014, 06:17 PM
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CLK 63 AMG Black Series, CLK 55 AMG
CLK 63 from 2008 with a little less than 80K miles
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Old 10-04-2014, 09:34 PM
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2 failure posts. 0 failure poll results
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Old 10-04-2014, 10:29 PM
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Originally Posted by Jasonoff View Post
2 failure posts. 0 failure poll results
Despite them posting I don't think they had failures?
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Old 10-04-2014, 10:29 PM
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Originally Posted by Tex5 View Post
CLK 63 from 2008 with a little less than 80K miles
Did you have a failure?
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Old 10-06-2014, 10:38 PM
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2010 C63 P30
Mods delete post.
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Old 10-07-2014, 10:07 PM
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C63 AMG
Bazman
How did you get 80k+ miles on a 2013?
or is this the ml?
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Old 10-27-2014, 09:49 PM
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C63 AMG
Come on people
Please
10,000's of members and 43 votes
Thanks in advance
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Old 11-16-2014, 01:29 AM
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C63 AMG, C36 AMG, SL500
51,000 KM
No Mods
Just out of Warranty
Water in both banks so at least 2 bolts failed.
My contribution about $2K
MB contribution $25K of parts (yes 25,000) and some labour.
New Pistons, Rings, all bearings and nearly everything else
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Old 11-16-2014, 01:33 PM
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Originally Posted by morganb View Post
51,000 KM
No Mods
Just out of Warranty
Water in both banks so at least 2 bolts failed.
My contribution about $2K
MB contribution $25K of parts (yes 25,000) and some labour.
New Pistons, Rings, all bearings and nearly everything else
I assume 25k aus $ for parts only?
What was the total?
Please post the reciept or pictures of the broken bolts
One on each bank would be rare
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Old 11-18-2014, 07:18 PM
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2008 C63, 2008 ML550, 2014 KTM 500 XC W, John Deere 990
got the low coolant warning this morning. I hope its just the cold weather. No sign of leaks.
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Old 11-18-2014, 07:21 PM
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Originally Posted by Euler View Post
got the low coolant warning this morning. I hope its just the cold weather. No sign of leaks.
Did you vote no failure and indicate mileage
If coolant in cylinder you'ld be throwing codes
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Old 11-18-2014, 08:08 PM
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Originally Posted by Ingenieur View Post
Did you vote no failure and indicate mileage
If coolant in cylinder you'ld be throwing codes
Yes, voted properly.
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Old 11-18-2014, 08:11 PM
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Originally Posted by Euler View Post
Yes, voted properly.
Thanks
Let us know how it turns out
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Old 12-12-2014, 08:03 PM
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C63 AMG
Monthly bump
Please vote
Thanks
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Old 12-21-2014, 06:58 PM
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2009 C63
2 bolts failed

Drastic coolant loss was first sign
no money out of pocket; warranty covered
occurred at 47k miles
no modifications
no early warning
bolts, gaskets, lifters replaced
now at 97k miles and no further problems
I was one of the earlier affected- comments in thread.
Good luck
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Old 11-08-2015, 05:07 PM
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Bump - should have some more insight! Lots of 63's out there!
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Old 11-09-2015, 09:57 PM
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10' C63, 02' Esprit, 93' Supra
did mine at 28k as preventative maintenance since i have a supercharger and put in the studs.
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Old 08-08-2016, 08:40 PM
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bump for more eye ***** on this
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