dc5itr888

Joe, Thanks a million. I was just about to PM you in regards to that.

Checked out vehicle and it is pretty clean and minor stone chips on the hood that have been covered up with touch up paint. If price is right then I might get it despite still being on the bad list and hope for the best. Eventually getting the Weistac bolts

motoman

bhamg, Theory says corrosion needs two (at least) dissimilar elements and electrolyte. Coolant is primarily developed for aluminum/iron and I have seen it work well in many engines. The worst I saw was an Audi which had a thermostat housing heavily eaten away. But as I said to merc, WTF is the explanation here? I would think alloy steel bolts would be less prone to rust than cast iron, e.g. water pump impellers and iron blocks .

Someone 'splain it to me in terms like...the coolant additives somehow have been depleted at the head bolt interface and water (electrolyte) is separated from solution and attacking iron in the classic manner. There must be a chemist or metallurgist out there... Please don't make me try to research on line...

I would like failure analysis. Wouldn't you? regards , motoman

bhamg

^ Agreed motoman. Somebody please step up. IIRC there is a packet of additives embedded in the cooling system designed to maintain a constant level of protection by replenishing
additives that are used up over time.

otakki

Anyone know the answer to this? Did MB ever change the camshaft adjusters on M156 production?

Lee Logue

Can you check my vin WDDGF7HB0BF622678

Valvestud

Not affected.

Regards,

Joe

Lee Logue

thanks joe

a100steaksauce

Valvestud

All 2010 and older, and some early 2011s are affected.

Regards,

Joe

Driven Change

Hello everyone,

I am in the purchasing process of a 2009 C63 and have learned of these headbolt failures. This car has 52k original miles and the seller is asking $22,500.
Is this a risky purchase?
Are there any tell tell signs of the failing headbolt before it fails?
I have seen the weistec replacement bolts.
Does anyone think that Mercedes would possibly good will this repair since its a well known failure?
I learned of the active recall on the airbags.
How common are the failures to the valves?

Thanks in advance for any input.

VIN: WDDG77XX9F26829

-Ronnie

Mr.Tee

Hi Joe, So I have just found this head bolt issue after all these years, nothing has happened yet and it shows no sign of wear and tear.

Could you check VIN WDDGF77X79F209471

As I am struggling to find any place to find if its affected or not. Probably is but about time it starts getting tuned.

Valvestud

All 2010 and older are in affected group.

Honro

Not 100% accurate.

Mine is November 2010 build, and I have he new bolts. I confirmed that last week when I had my cracked valve cover replaced

Short of taking the valve covers off, I think the best to go on is after engine 60658 & if it has the black plastic valve covers.

Valvestud

It is accurate. Post your VIN. US car? If no, then it may not be 2010.

Honro

VIN: WDD2040772F623330
Australian Car.

And mad a mistake, car is December build. NOT November. My Apologies!

Valvestud

Countries outside US don't conform to US model year process.

Honro

Fair point, but pardon my ignorance, maybe the next question will be a dumb one but ill ask it anyway...


Whist my car is Australian, why would that even matter? They are all built in Germany, so the build date & engine number on the data-card are given at the AMG Factory in Germany. Therefor the US Model year process would be the same? The only date that would change would be the "Delivery Date"??

Valvestud

We use the US model years to define if the car is in the affected range. If a US car is 2010 and older, it's always affected. Some early 2011s are as well. This is why one must check the VIN in the database to ascertain the engine number. Yes, the engines are built in Germany, and they can go into cars of all countries. But again, here in the US we know that any car in model year 2010 or older is affected, without having to look up the data. You're car was right in that spot where it crossed over into 2011 model year even though you point out it was made in 2010.

snafu79

Hi new member here.

Any chance my VIN could be checked if my car is affected as well? WDD2042772F564429

I believe my engine number ending in 62868 is outside the range but would like to be sure.

Valvestud

Not affected.

snafu79

Thank you sir. Much appreciated.

muhoms1

WDDGF7HB5AF404251 old thread worth a shot.

Jasonoff

A 2010 is for sure affected.

Valvestud

https://mbworld.org/forums/c63-amg-w...rly-2011s.html

Jayflight

can you check if my car is in the affected with the old head bolts ? VINWDDGF77XX9F220769