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NEED oversize KA piston help

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That is about.76mm. Try looking for them in mm. O'Reilly Auto lists a part number for d21 kae pistons in 0.5mm and 1.0mm oversize.


Try rock auto.


Look up Clegg machine website. They sell rebuild kits at good prices including the option to oversize

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KA24DE piston won't fit.


KA24E do have the same pin height and your compression would be 9.52 with a stock piston and 9.67 with a 1mm oversize piston. Be sure to check the width of the Z24 rod small end inside the KA piston. There has to be enough room for the piston to center itself over the rod bearing. I'm saying you may need to machine the Z24 rod small end slightly narrower.


I'll find one of my old KA and Z24 rods and measure them tomorrow..

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KA24E rod small end width


240sx S13.................... 0.985" these have the full floating pins

D-21 Hardbody............. 0.865" these use regular press in pins.



The Z24 you'll have to measure yourself. It's important that the rod/pin be able to slide side to side in the piston.

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