red13 Posted April 3, 2014 Report Share Posted April 3, 2014 Just pulled my l16 apart and the piston have ampco pistons there any info on these Quote Link to comment
flatcat19 Posted April 3, 2014 Report Share Posted April 3, 2014 Pics might help. Quote Link to comment
TENDRIL Posted April 3, 2014 Report Share Posted April 3, 2014 i think they are "lightweight" flat tops . what head is on the motor are there any markings on the cam? this thread is useless without pics Quote Link to comment
TENDRIL Posted April 3, 2014 Report Share Posted April 3, 2014 chances are it was rebuilt and maybe upgraded. why is the motor apart?? Quote Link to comment
red13 Posted April 3, 2014 Author Report Share Posted April 3, 2014 I am rebuilding i had oil in the water, but no water in the oil. Want to keep my truck stock. Quote Link to comment
TENDRIL Posted April 3, 2014 Report Share Posted April 3, 2014 matter oh fact i think those came in the 240z stock, Quote Link to comment
flatcat19 Posted April 4, 2014 Report Share Posted April 4, 2014 Measure the bore. Quote Link to comment
datzenmike Posted April 4, 2014 Report Share Posted April 4, 2014 This is a Nissan piston. They appear to have a slight dish, besides the relief cuts. AFIK this is also an L16 piston... Quote Link to comment
TENDRIL Posted April 4, 2014 Report Share Posted April 4, 2014 PistonsPiston pin heights (center of pin to top of piston) / piston dish volume/ stock boreL13, L24-------------38.1mm / 0.0cc dish / 83mm boreL16, L26------------ 38.1mm / 7.01cc dish / 83mm boreL18------------------- 38.1mm / 4.36cc dish / 85mm boreL20B----------------38.1mm / 11.36cc dish / 85mm boreL28 (early)---------- 38.1mm /10.90cc dish in 280Z, early ZX.('75-'80)/ 86mm boreL28 (late)------------ 38.1mm /0.0cc Flatop in '81-'83 ZX / 86mm bore Connecting rodsCenter to center length, all use the same 21mm diameter piston wrist pinL18, L28, L26--------------130.2mmL16, L24---------------------133.0mmL13----------------------------139.9mmL20B, Z22S, early Z22E-145.9mm* didnt really see the dish but i do now.. its all stock Quote Link to comment
red13 Posted April 23, 2014 Author Report Share Posted April 23, 2014 got my pistons cleaned and they match the bore. was wondering what you guys thing if these are still ok to run the one on the far left as the most damage. Quote Link to comment
ggzilla Posted April 23, 2014 Report Share Posted April 23, 2014 AMPCO are excellent pistons, made in Japan out of lo-ex. They look tone in good shape, just change the rings. They are factory pistons. Quote Link to comment
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