M156 head bolt problems
03-26-2014, 07:44 PM
#676
so you lost no coolant but 'smelled' some during a routine oil change and decided to pull the head?
no other symptoms
Last edited by Ingenieur; 03-26-2014 at 07:48 PM.
03-26-2014, 08:02 PM
#677
Member
Smelled it first. Then could feel it in a sample. Pulled the pan and there was a bit in the bottom. But not a huge amount. By pure luck, this only started within the last few days. That's all I know right now. What are you not understanding?
03-26-2014, 08:38 PM
#678
how someone can discern minute quantities of coolant during an oil change
or 'feel it' when mixed with oil
in such small qtys that the coolant level did not change
and why the pan would be pulled to begin with?
and why it would settle in the bottom?
and how you could tell it 'started' since it was only discovered during the oil change
and this resulted in the heads being pulled
without a compression or leak down test
or a cooling system pressure test
etc.
apparently many things
03-26-2014, 08:51 PM
#679
Member
how someone can discern minute quantities of coolant during an oil change
or 'feel it' when mixed with oil
in such small qtys that the coolant level did not change
and why the pan would be pulled to begin with?
and why it would settle in the bottom?
and how you could tell it 'started' since it was only discovered during the oil change
and this resulted in the heads being pulled
without a compression or leak down test
or a cooling system pressure test
etc.
apparently many things
or 'feel it' when mixed with oil
in such small qtys that the coolant level did not change
and why the pan would be pulled to begin with?
and why it would settle in the bottom?
and how you could tell it 'started' since it was only discovered during the oil change
and this resulted in the heads being pulled
without a compression or leak down test
or a cooling system pressure test
etc.
apparently many things
Amazing isn't it? Maybe Jesus intervened
03-26-2014, 08:55 PM
#680
03-26-2014, 10:10 PM
#681
Member
03-27-2014, 02:50 AM
#683
Senior Member
So by the sounds of it, would Blackstone labs let us know 100% if we would be experiencing a hold bolt failure soon just by the oil analysis? If so, I would absolutely do that every 6 months or so as it would be cheap insurance & maybe we can get a subscription "Group Buy" thing going on
03-27-2014, 08:19 AM
#684
MBWorld Fanatic!
So by the sounds of it, would Blackstone labs let us know 100% if we would be experiencing a hold bolt failure soon just by the oil analysis? If so, I would absolutely do that every 6 months or so as it would be cheap insurance & maybe we can get a subscription "Group Buy" thing going on
At that point you likely won't be able to remove the bolt even if the head hasn't already snapped of.
03-27-2014, 04:09 PM
#685
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2017 Mini Cooper S Clubman ALL4 - British Racing Green
or 'feel it' when mixed with oil
in such small qtys that the coolant level did not change
in such small qtys that the coolant level did not change
and why the pan would be pulled to begin with?
and why it would settle in the bottom?
and how you could tell it 'started' since it was only discovered during the oil change
and this resulted in the heads being pulled
without a compression or leak down test
or a cooling system pressure test
etc.
apparently many things
without a compression or leak down test
or a cooling system pressure test
etc.
apparently many things
03-27-2014, 04:49 PM
#686
No idea
After sitting for a period, the oil and water would separate, how you would feel it, no idea
Make sure all non oil fluids are evacuated? simple oil change might leave non oil fluids in the pan.
Physics... oil and water do not mix, or at least do not remain mixed. Eventually the oil and fluid will separate and the oil will float to the top leaving coolant at the bottom.. Come on, based on some of your engineering type posts, one would expect you to know this.
Another no idea..
After sitting for a period, the oil and water would separate, how you would feel it, no idea
Make sure all non oil fluids are evacuated? simple oil change might leave non oil fluids in the pan.
Physics... oil and water do not mix, or at least do not remain mixed. Eventually the oil and fluid will separate and the oil will float to the top leaving coolant at the bottom.. Come on, based on some of your engineering type posts, one would expect you to know this.
Another no idea..
By product of combustion
Condensation
Good idea to get it hot and cook it off
Blackstone reports all show some water and fuel but seldom coolant present
03-28-2014, 05:03 PM
#689
03-31-2014, 06:42 PM
#691
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C63AMG, NIssan NX2000, Pontiac Fiero GT
Blackstone oil analysis report: water-none, coolant -none . All else-normal
Wifes DD, 29K miles. Oil change interval 1 year . 0W-40 Mobil 1. Oil change mileage 4k. Car run in auto only, seldom used hard . No track/drags.
OK-So with that assurance I expect a broken headbolt any time now.
Post script. Iron was the only item discussed in the Blackstone narrative with the report. While it was within the average for "this type Mercedes engine," the level seen was that of the "6700 mile" change interval. Not to worry says Blackstone, but it reminded me of the cam/lifter story.
Wifes DD, 29K miles. Oil change interval 1 year . 0W-40 Mobil 1. Oil change mileage 4k. Car run in auto only, seldom used hard . No track/drags.
OK-So with that assurance I expect a broken headbolt any time now.
Post script. Iron was the only item discussed in the Blackstone narrative with the report. While it was within the average for "this type Mercedes engine," the level seen was that of the "6700 mile" change interval. Not to worry says Blackstone, but it reminded me of the cam/lifter story.
Last edited by motoman; 04-01-2014 at 10:38 AM. Reason: Iron, clarify car mileage
03-31-2014, 07:00 PM
#692
MBWorld Fanatic!
Blackstone oil analysis report: water-none, coolant -none . All else-normal
Wifes DD, 29K. Oil change interval 1 year . 0W-40 Mobil 1. Oil change mileage 4k. Car run in auto only, seldom used hard . No track/drags.
OK-So with that assurance I expect a broken headbolt any time now.
Wifes DD, 29K. Oil change interval 1 year . 0W-40 Mobil 1. Oil change mileage 4k. Car run in auto only, seldom used hard . No track/drags.
OK-So with that assurance I expect a broken headbolt any time now.
04-01-2014, 11:12 AM
#694
MBWorld Fanatic!
04-01-2014, 12:21 PM
#695
04-04-2014, 08:27 PM
#698
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2009 C63 AMG
This is kind of ironic, but after shelling out cash for replacing headbolts and lifters, now I am forced to put my C63 up for sale due to tough personal financial situation... Anyone wants to get a used C63 and not worry about the dreaded headbolt problem, please let me know. My loss is somebody's gain...
FS: 2009 Mercedes C63 AMG | Arctic White/Sahara Beige | OE Tune | Headbolts Replaced
FS: 2009 Mercedes C63 AMG | Arctic White/Sahara Beige | OE Tune | Headbolts Replaced
04-09-2014, 01:32 PM
#699
Member
Woo hoo
After a few weeks I have new headbolts (mercedes redesign), new tappets and buckets as a precaution. New power steering pump and a few other things it needed. $10k later I am on the road with a bullet proof like new SL63 AMG
After a few weeks I have new headbolts (mercedes redesign), new tappets and buckets as a precaution. New power steering pump and a few other things it needed. $10k later I am on the road with a bullet proof like new SL63 AMG
04-13-2014, 03:24 PM
#700
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09 c63 p30 mars red
I just got my 2009 back with updated headbolts & valve buckets replaced under my CPO warranty that was a week from expiring! I took the car in for a CEL that turned out to be a fuel pressure sensor. When I checked in the car I told the SA that I had to add coolant a couple of months ago and I was very concerned about headbolt failure. He said he had heard of it but never seen it. I told him I want the bolts checked and I wanted him to document my concern while the car was still under warranty. That night I forwarded the SA and service manager the links to the sticky about headbolts on this site and this one http://www.marcusfitzhugh.com/CLK/63.html
To my surpise he called a couple of days later and said they were going to do the upgrade under the warranty!
There is much less engine noise in the engine compartment and is running great!
I believe with all the recall hype in the news today MB doesn't want any bad press so it may be a good time to put some pressure on you dealership to get it approved by MB. Hope this helps ---
______________
To my surpise he called a couple of days later and said they were going to do the upgrade under the warranty!
There is much less engine noise in the engine compartment and is running great!
I believe with all the recall hype in the news today MB doesn't want any bad press so it may be a good time to put some pressure on you dealership to get it approved by MB. Hope this helps ---
______________
