06-17-2015, 12:19 PM
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C63 Head Bolts and Engine Repair
04-16-2015, 02:11 PM
#176
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C63
11-21-2015, 05:44 PM
#177
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a fast one
Hi all, any idea if this same issue exists for an early '11 (vehicle offered for sale January 2011 per carfax) c63 w/ the Development Package? tempted by a used one, 1 owner, 26k miles........
thanks for any feedback!
thanks for any feedback!
Last edited by uberschnell; 11-21-2015 at 05:49 PM.
11-21-2015, 05:56 PM
#178
MBWorld Fanatic!
Check the vin against the service bulletin posted in the sticky section
[QUOTE=uberschnell;6622148]Hi all, any idea if this same issue exists for an early '11 (vehicle offered for sale January 2011 per carfax) c63 w/ the Development Package? tempted by a used one, 1 owner, 26k miles........
thanks for any feedback![/QUO TE]
thanks for any feedback![/QUO TE]
11-21-2015, 07:08 PM
#179
After reading all this, I may have nightmares worrying about the engine coming apart. It's an eleven purchased in March 2011. So far only thing required was right side cam sensor replaced. They did put some sealant on bolts on lower right side of engine near motor mount. Some oil was seeping out.
11-22-2015, 01:27 PM
#180
MBWorld Fanatic!
Check the vin against the service bulletin posted in the sticky section
After reading all this, I may have nightmares worrying about the engine coming apart. It's an eleven purchased in March 2011. So far only thing required was right side cam sensor replaced. They did put some sealant on bolts on lower right side of engine near motor mount. Some oil was seeping out.
11-23-2015, 08:17 AM
#181
MBWorld Fanatic!
After reading all this, I may have nightmares worrying about the engine coming apart. It's an eleven purchased in March 2011. So far only thing required was right side cam sensor replaced. They did put some sealant on bolts on lower right side of engine near motor mount. Some oil was seeping out.
Just post or PM me your VIN and I can tell you if affected.
05-17-2016, 04:09 PM
#186
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GL450
I kept seeing high mile C63's on eBay for $20k and thought hmmm....
Nice car but that still seems like a lot of cash given the mileage. After seeing this, no way. You're about to see a lot of very unhappy 2nd owners who are going to get a bill for more than they paid for the whole car.
Nice car but that still seems like a lot of cash given the mileage. After seeing this, no way. You're about to see a lot of very unhappy 2nd owners who are going to get a bill for more than they paid for the whole car.
06-05-2016, 07:22 AM
#187
Perhaps a naive suggestion*–*not a mechanic*–*as the M156 head bolts run through a coolant / water jacket and failure is apparently due to corrosion related weakness ... are there any preventative chemical additives that can be mixed with the coolant to prohibit / reduce bolt corrosion?
06-06-2016, 11:30 PM
#188
Senior Member
The head bolt issue in the early M156 engine is well documented as insufficient strength at the head of the head bolt. The head of the bolt can crack or break off, resulting in loss of clamping force at the head gasket. A redesign of the head bolt was all that required to correct the problem. I have not heard of corrosion being a factor.
