Join Date: Feb 2007
Location: Hillsboro OH/ Adrian MI
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I have a Cat SDP that keeps blowing head gaskets. VVAs are off so the stock high compression pistons are too much. Does anybody know what the Cat part numbers are for the correct low compression pistons? Should I be looking for 15.2:1 or 16:1? I've been told I have 18:1 Pistons now. Serial #SDP04546. All liner protrusions are close to .0045. I'm considering counter boring and shimming to .005. Appreciate any help.
There is a shop in Ohio that can make your 18:1 pistons 16:1 without just cutting material off the crown, they match them to the 16:1 by machining the bowl to make them identical.
79 KW W900A 3406B, Garrett GT55 turbo, RTO12513,
4.11 SQHP rockwells
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