Coolant leak

tintelben · 03-28-2012, 11:03 AM

Hi.
I have serious problem with my C63 (2009 and 35 000 miles). Over the last 1,5 months I have constantly losing coolant. So far I have filled with extra 4 liters in it. Car has been twice in the repair shop and they don´t find any leakage - everything is dry as usual.
So today they told me that maybe I have crack in the engine or something else and that causes coolant loss into engine. Does anybody have any information about it or same problem?

P.S. Does the 63 engine have any extended warranty via factory as it is serious fault if engine has crack??

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TexasEngineer · 03-28-2012, 11:09 AM

It sounds like you may have a leaking head gasket. I believe there is a TSB for replacing the head bolts and gaskets for M156 engines that are eating coolant. Depending on the original purchase date of the car, you should still be covered under warranty. Let us know what the dealer finds.

Merc63 · 03-28-2012, 11:21 AM

Ya I bet it's those *** head bolts! Id be realllyyyy careful you dont hydrolock your engine!

tintelben · 03-28-2012, 04:49 PM

Thanks. Will check it out ASAP.
I figured out one thing, maybe it is important. I filled up the coolant system and drove very hardly and after 5 miles 2 L of coolant was gone, but when I drive slowly no leakage

Hope that there is no major issue. I will keep you informed.
In what circumstances they will replace it under the warranty. Purchase date is 07.2009?

Even Money · 03-28-2012, 05:10 PM

There's a recent thread in here on this, a quick search should find it.

Merc63 · 03-28-2012, 07:22 PM

Quote:

Originally Posted by tintelben

Thanks. Will check it out ASAP.
I figured out one thing, maybe it is important. I filled up the coolant system and drove very hardly and after 5 miles 2 L of coolant was gone, but when I drive slowly no leakage

Hope that there is no major issue. I will keep you informed.
In what circumstances they will replace it under the warranty. Purchase date is 07.2009?

WOWWWWWWzers.

2 Liters in 5 miles!!!! F me.

You got a serious problem bud, I wouldn't be driving that thing at all!!

Are you sure its not leaking out somewhere?? That is a lot of liquid to just disappear.

If that coolant is enter the cylinders its a friggen miracle you haven't hydrolocked that engine yet. On second thought I think thats nearly impossible that the engine wouldn't have hydrolocked.. It must be leaking out somewhere, you would be blowing white smoke out the exhaust badly.

Jons95c36amg · 03-28-2012, 08:08 PM

I would check the oil condition-ASAP. My C63 has over 24k and without coolant loss. I hope it stays that way.

tintelben · 03-29-2012, 02:08 AM

Quote:

Originally Posted by Even Money

There's a recent thread in here on this, a quick search should find it.

Tried to search it yesterday - no luck at all

bhamg · 03-29-2012, 03:14 AM

Quote:

Originally Posted by tintelben

Tried to search it yesterday - no luck at all

Here it is - you are losing an enormous amount of coolant - park the car!:

2010 C63 P31: Porous Aluminum Head, Leak in Bottom Plate, & Bad Head Bolts

tintelben · 03-29-2012, 05:11 AM

Quote:

Originally Posted by bhamg

Here it is - you are losing an enormous amount of coolant - park the car!:

2010 C63 P31: Porous Aluminum Head, Leak in Bottom Plate, & Bad Head Bolts

Thanks. This thread I have read, I thought another thread is out here.
Weird is when I drive slowly (normal) no coolant loss then...

tintelben · 04-02-2012, 11:35 AM

Got first information from dealer and he stated that head gasket is leaking and probably head bolt failure also, because they are related. No feedback about warranty so far.
Does anybody have any ideas, is there any possibility to solve this issue at AMG/factory/dealer expense?
Regular warranty has expired

Merc63 · 04-02-2012, 12:43 PM

Lol and they say these bolts are fine...

You are so lucky you haven't hydro locked your engine.

Let us know if they fix it.

bhamg · 04-02-2012, 05:36 PM

Quote:

Originally Posted by tintelben

Thanks. This thread I have read, I thought another thread is out here.

There was, this one:

Confused about the head bolt issue

Sheep · 04-02-2012, 07:40 PM

To OP: can you post about whom built your engine?

Sheep

-Marlin- · 04-02-2012, 08:56 PM

Are you blowing white smoke out of the exhaust? --and a sweet smell to go with?

BerBer63 · 04-02-2012, 09:37 PM

post dealership who does service

tintelben · 04-03-2012, 02:53 AM

Engine is built by Robert Feiler.
No smoke from exhaust. Only thing I have noticed is that cabin temperature is low (two times).

Merc63 · 04-03-2012, 02:45 PM

Whats the dealer saying at this point with regard to warrantying the work?

It wont be a cheap job as I believe the cams x4 have to come out and that is a PIA.

Jons95c36amg · 04-03-2012, 05:19 PM

I wonder if these bolts are overtighten. Which causes them to break?

bhamg · 04-03-2012, 06:16 PM

Quote:

Originally Posted by Jons95c36amg

I wonder if these bolts are overtighten. Which causes them to break?

It's hard to believe that a bunch of AMG engine techs were over-torqueing head bolts. I'd be more inclined to believe that it was a metallurgy issue with the bolt itself, which would most likely make it a supplier-related problem. It reminds me of the bearing issue in the E46 M3 that necessitated an extended warranty from BMW.

Weistec · 04-03-2012, 06:17 PM

Hey Guys it is very unfortunate what some of you are going through. We have seen the flaws in the M156 engine, and this is definitely one of them. With that being said we have designed an ARP Head Stud that is over four times stronger than the factory torque to yield bolts. These Head Studs have been used by our high power supercharged cars and have been proven at over 15psi of boost.

Remember if installed incorrectly, a torque to yield bolt can stretch beyond its maximum tensile strength and become exponentially weaker. We believe this coupled with the fact Mercedes did have running changes is a major factor in why people are having these problems. If anyone is interested feel free to PM or email us for more details. Thanks guys.

Weistec Engineering

rage2 · 04-03-2012, 07:42 PM

Quote:

Originally Posted by Jons95c36amg

I wonder if these bolts are overtighten. Which causes them to break?

Quote:

Originally Posted by bhamg

It's hard to believe that a bunch of AMG engine techs were over-torqueing head bolts. I'd be more inclined to believe that it was a metallurgy issue with the bolt itself, which would most likely make it a supplier-related problem.

It's impossible for the AMG engine builder to overtorque the bolts. The torque, order process is all computer controlled and recorded using some fancy torque gun.

Sincity · 04-03-2012, 08:11 PM

What is the build date of your car?

bhamg · 04-03-2012, 10:55 PM

Quote:

Originally Posted by Sincity

What is the build date of your car?

Are these cases only happening with 2009's?

BerBer63 · 04-03-2012, 11:09 PM

I got an 09 with 34k....impending doom

03-28-2012, 11:21 AM	#3
Merc63 MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2009 Posts: 2,646 Drives: C63 AMG	Ya I bet it's those *** head bolts! Id be realllyyyy careful you dont hydrolock your engine! __________________ Weistec Stage 3 MHP headers HR springs Custom 3" Xpipe ---------------------------------------------- PARTING OUT ENTIRE 2009 C63 AMG! http://mbworld.org/forums/c63-amg-w2...-2009-c63.html

03-28-2012, 04:49 PM	#4
tintelben Junior Member Garage is empty, add now Join Date: Apr 2011 Posts: 30 Drives: C63	Thanks. Will check it out ASAP. I figured out one thing, maybe it is important. I filled up the coolant system and drove very hardly and after 5 miles 2 L of coolant was gone, but when I drive slowly no leakage Hope that there is no major issue. I will keep you informed. In what circumstances they will replace it under the warranty. Purchase date is 07.2009? Last edited by tintelben; 03-28-2012 at 04:53 PM.

03-28-2012, 08:08 PM	#7
Jons95c36amg MBWorld Fanatic! Garage is empty, add now Join Date: Feb 2007 Location: Desert Posts: 3,244 Drives: 02 CLK 55 AMG,09 C63 loaded with P30	I would check the oil condition-ASAP. My C63 has over 24k and without coolant loss. I hope it stays that way. __________________ 02 CLK55-13.1@108.6 stock 95 C36 sold 09 C63-12.6@115 stock OE-tuning-only tune stock filters,charcoals intact-11.9@118.5 best trap 119 60-130 in 8.71sec "VERIFIED"-6speedonline.TUNED ONLY .Stock filters,charcoals intact,93oct. Everything else stock.

04-02-2012, 07:40 PM	#14
Sheep Super Member Garage is empty, add now Join Date: May 2009 Location: Pittsburgh, PA Posts: 785 Drives: 2013 Nissan GT-R BE	To OP: can you post about whom built your engine? Sheep __________________ 2013 Nissan GT-R Black Edition Jet Black 2010 C63 AMG Capri Blue (359,205,P02,P31,105,218,293,318,320,471,731 and 889) (Sold) 2005 Mazda RX-8 Winning Blue (Sold)

04-02-2012, 09:37 PM	#16
BerBer63 MBWorld Fanatic! Garage is empty, add now Join Date: Aug 2008 Location: Los Angeles Posts: 1,993 Drives: 2009 C63	post dealership who does service __________________ 2009 C63 Palladium Silver

03-28-2012, 11:09 AM	#2
TexasEngineer Member Garage is empty, add now Join Date: Aug 2010 Location: Houston, TX Posts: 92 Drives: 2009 C63	It sounds like you may have a leaking head gasket. I believe there is a TSB for replacing the head bolts and gaskets for M156 engines that are eating coolant. Depending on the original purchase date of the car, you should still be covered under warranty. Let us know what the dealer finds.

03-28-2012, 05:10 PM	#5
Even Money MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2009 Location: PNW Posts: 1,692 Drives: C63 Black Series	There's a recent thread in here on this, a quick search should find it.

04-02-2012, 11:35 AM	#11
tintelben Junior Member Garage is empty, add now Join Date: Apr 2011 Posts: 30 Drives: C63	Got first information from dealer and he stated that head gasket is leaking and probably head bolt failure also, because they are related. No feedback about warranty so far. Does anybody have any ideas, is there any possibility to solve this issue at AMG/factory/dealer expense? Regular warranty has expired

04-02-2012, 12:43 PM	#12
Merc63 MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2009 Posts: 2,646 Drives: C63 AMG	Lol and they say these bolts are fine... You are so lucky you haven't hydro locked your engine. Let us know if they fix it.

04-02-2012, 08:56 PM	#15
-Marlin- Member Garage is empty, add now Join Date: Mar 2012 Posts: 82 Drives: Pdm Silver C63	Are you blowing white smoke out of the exhaust? --and a sweet smell to go with?

04-03-2012, 02:53 AM	#17
tintelben Junior Member Garage is empty, add now Join Date: Apr 2011 Posts: 30 Drives: C63	Engine is built by Robert Feiler. No smoke from exhaust. Only thing I have noticed is that cabin temperature is low (two times).

04-03-2012, 02:45 PM	#18
Merc63 MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2009 Posts: 2,646 Drives: C63 AMG	Whats the dealer saying at this point with regard to warrantying the work? It wont be a cheap job as I believe the cams x4 have to come out and that is a PIA. __________________ Weistec Stage 3 MHP headers HR springs Custom 3" Xpipe ---------------------------------------------- PARTING OUT ENTIRE 2009 C63 AMG! http://mbworld.org/forums/c63-amg-w2...-2009-c63.html

04-03-2012, 05:19 PM	#19
Jons95c36amg MBWorld Fanatic! Garage is empty, add now Join Date: Feb 2007 Location: Desert Posts: 3,244 Drives: 02 CLK 55 AMG,09 C63 loaded with P30	I wonder if these bolts are overtighten. Which causes them to break? __________________ 02 CLK55-13.1@108.6 stock 95 C36 sold 09 C63-12.6@115 stock OE-tuning-only tune stock filters,charcoals intact-11.9@118.5 best trap 119 60-130 in 8.71sec "VERIFIED"-6speedonline.TUNED ONLY .Stock filters,charcoals intact,93oct. Everything else stock.

04-03-2012, 06:17 PM	#21
Weistec SPONSOR Garage is empty, add now Join Date: Dec 2010 Posts: 238 Drives: M156 Supercharged	Hey Guys it is very unfortunate what some of you are going through. We have seen the flaws in the M156 engine, and this is definitely one of them. With that being said we have designed an ARP Head Stud that is over four times stronger than the factory torque to yield bolts. These Head Studs have been used by our high power supercharged cars and have been proven at over 15psi of boost. Remember if installed incorrectly, a torque to yield bolt can stretch beyond its maximum tensile strength and become exponentially weaker. We believe this coupled with the fact Mercedes did have running changes is a major factor in why people are having these problems. If anyone is interested feel free to PM or email us for more details. Thanks guys. Weistec Engineering __________________ World's First Supercharged M156 6.3L CONNECT WITH US www.Weistec.com Sales@Weistec.com Check out our Instagram @Weistec

04-03-2012, 08:11 PM	#23
Sincity MBWorld Fanatic! Garage is empty, add now Join Date: Feb 2003 Location: Vegas, baby! Posts: 5,458 Drives: '86 190e restoration project, '08 Acura RDX, '09 C63 AMG	What is the build date of your car? __________________ "Unofficial Member" of the Vancouver Benz crew.

04-03-2012, 11:09 PM	#25
BerBer63 MBWorld Fanatic! Garage is empty, add now Join Date: Aug 2008 Location: Los Angeles Posts: 1,993 Drives: 2009 C63	I got an 09 with 34k....impending doom __________________ 2009 C63 Palladium Silver

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