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Old 08-24-2019, 02:56 PM   #1
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Join Date: Apr 2008
Location: Lower Alabama= God's country, if God wanted mosquito and red ant bites, and to be covered in mildew
Posts: 3,438

1997 SL
Default my piston "soak"

1997 SL
197,000 miles

It burns little oil, if any, probably because I used synthetic for most of its 22 years.

Anyway, While doing the head gasket repair, with the head OFF, I turned the engine so the pistons were all 1/2 way. Then poured Berryman B12(?) cleaner on each piston. Let it soak. Made sure it got between piston and cylinder, with a spatula. Did this for a week or so.

Then did the same with MMO. About 1/4 cup at most into each cylinder. Every once in a while, I turned the engine so the pistons went up and down.

Some yucky black glop drained from the empty oil pan. I was surprised.

Some cylinder(s) drained the B12 or MMO faster than others.

My cylinders were 185 psi for all 4 when tested this spring.

Maybe this can't hurt

97 SL. Born 6/5/97, bought 7/7/97
08 Burgman 400
02 Haro MTB- can't kill it, still trying though

The Schofield Kid: Yeah, well, I guess they had it coming.
Will Munny: We all got it coming, kid.


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