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Piston Slap? Piston Slap?
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  #1  
Old 10-14-2007, 10:12 PM
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Quote:
Originally Posted by TheDon View Post
piston slap fixed with new motor mounts.... ha..
FWIW, there’s an MB Service Bulletin from July 2003, that recommends replacing the engine mounts to cure a “piston slap like sound” on certain V8 powered MB’s. I realize the justncases’ car has the M112 V6, but I’ve fixed many “engine knock” complaints by replacing worn engine/transmission mounts.


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Originally Posted by Hatterasguy View Post
If its missing it would throw a code. Did the dealer pull any codes out of the SDS?
Who said the engine was mis-firing?


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Originally Posted by Hatterasguy View Post
....Also if the dealer said it was piston slap they are idiots, I would never go back. "Piston slap" is a problem that affects some GM engines. On cold starts they will make noise for a few minutes until they heat up and expand. WTF is this dealer thinking?
So GM has the market cornered on piston slap? I’ve replaced dozens of “fitted blocks” (new engine blocks with fitted pistons), over the last few years due to piston slap. By the time the driver hears it, the piston skirts have made a mess out of the cylinder walls.
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  #2  
Old 10-16-2007, 01:06 PM
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Quote:
Originally Posted by ILUVMILS View Post
FWIW, there’s an MB Service Bulletin from July 2003, that recommends replacing the engine mounts to cure a “piston slap like sound” on certain V8 powered MB’s. I realize the justncases’ car has the M112 V6, but I’ve fixed many “engine knock” complaints by replacing worn engine/transmission mounts.

So GM has the market cornered on piston slap? I’ve replaced dozens of “fitted blocks” (new engine blocks with fitted pistons), over the last few years due to piston slap. By the time the driver hears it, the piston skirts have made a mess out of the cylinder walls.
I'm surprised that engine mounts are wearing on a 2003. Has there been a design change?

Also, re: replacing engine blocks - ILUVMILS, are you talking about MB engine blocks?
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  #3  
Old 10-16-2007, 01:21 PM
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Originally Posted by dlssmith View Post
Also, re: replacing engine blocks - ILUVMILS, are you talking about MB engine blocks?
Yes, MB engine blocks with fitted pistons and rings.
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  #4  
Old 10-16-2007, 02:08 PM
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Originally Posted by ILUVMILS View Post
Yes, MB engine blocks with fitted pistons and rings.
Any particular models worse than others? V6, V8?
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  #5  
Old 10-16-2007, 11:12 PM
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M112's and M113's.
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  #6  
Old 10-16-2007, 11:20 PM
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Originally Posted by ILUVMILS View Post
M112's and M113's.
Why do these engines sometimes need a new block?

Are these early engines (1998-1999) run on conventional motor oil on FSS?
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Old 10-18-2007, 08:02 PM
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Interested in this thread.

W210 in my future fading (rust...)...fading (spring perches)...fading...

Maybe I'll just get that 450sel I've wanted for ten years.
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  #8  
Old 10-18-2007, 11:28 PM
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Originally Posted by suginami View Post
Why do these engines sometimes need a new block?
As I posted earlier, by the time the driver hears the noise, it's too late. The cylinder walls/piston skirts are damaged.
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