LMM: Questions on motor removal

Alligator

New member
Nov 9, 2006
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N. Idaho
Seems like the last several I have seen have a hole and a small crack. I just wonder if the crack started first, then the fuel slowly eroded away at the crack until it holes it...?
 

ripmf666

Active member
Sep 20, 2006
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Wentzville Mo
Glad you got it part. another hole hmmm chad me you all had holes no cracks in pistons very strange. wait untill you pull that piston i bet the whole side will be blown out. I can allready see all the smeared metal on the wall. Well at least you didint pull it for nothing


If you look there's a crack very fine one
 

Leadfoot

Needs Bigger Tires!
Dec 27, 2006
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Western MA
www.matpa.org
I can allready see all the smeared metal on the wall.

I didn't even see that at first :eek:

For those that have not had a scratch in the cylinder wall from a cracked piston and/or ring, but have had the "Metal smear" did you/they have to bore the cylinder larger or were they able to clean it up with a hone??
 

slowlmm

New member
Mar 2, 2008
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so cal
I didn't even see that at first :eek:

For those that have not had a scratch in the cylinder wall from a cracked piston and/or ring, but have had the "Metal smear" did you/they have to bore the cylinder larger or were they able to clean it up with a hone??

mine would of cleaned up. but i opted to go 40 over for a little more air
 

JoshH

Daggum farm truck
Staff member
Vendor/Sponsor
Feb 14, 2007
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Texas!!!
I didn't even see that at first :eek:

For those that have not had a scratch in the cylinder wall from a cracked piston and/or ring, but have had the "Metal smear" did you/they have to bore the cylinder larger or were they able to clean it up with a hone??
I honed mine, but it did not completely clean up the cylinder wall. Now that I'm going back in, I'm going .020" over on the bore.