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Registered
Join Date: Aug 2007
Posts: 374
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mahle 3.0 piston markings
I have three sets of mahle standard 3.0 cis pistons all measure the same diameter. Inside they have different raised casting numbers. 93L7 ++ and CO21, 93L7++ and CO11, +93L7 and CO11, on the tops of the pistons they have a small stamped 1 or 2. One of the pistons is marked 95L70 ++ which i believe indicates a higher compression ratio. what do these numbers mean as i am trying to select 6 for a rebuild.
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05-19-2012, 11:24 AM
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