Question about 3,8 ltr engine pistons June 07, 2007, 03:43:44 PM I have 1986 3,8ltr V6 engine. Can I use in this engine pistons for 3,8ltr V6 1988-95 ?Pistons heads (top) are visually same design.Ring grooves of new pistons are smaller, but I also will use rings for new type pistons (88-95).Piston pin is by measurements same size.Piston skirt is little bit different design (shorter). But in my opinion, it will be not matter so much.The only difference, what I found, is distance from pin to top of piston. New type piston are about 0,016 inch (0,4mm) shorter. It will probably decrease compression ratio. But how much?Does anybody had experience with new type pistons in old type engine? Quote Selected
Question about 3,8 ltr engine pistons Reply #1 – June 08, 2007, 08:48:55 PM its not the compression decrease that is important but the possibility of the decrease in quench area. maybe use the newer rods also. Quote Selected
Question about 3,8 ltr engine pistons Reply #2 – June 19, 2007, 10:31:37 AM Quote from: dudeman351;152764 maybe use the newer rods also.My local parts dealer told me, that by their catalog/database, connecting rods for 86 and 89 engines are same. They have same part numbers. Quote Selected
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