niner11 Posted September 16, 2007 Share Posted September 16, 2007 Been searching but I can't seem to find out what to do with cam timing when swaping heads. I have a 280zxt with a p90a and before removing the head I found TDC on number one and marked both links of the timing chain and sprocket. Well as soon as the head came off I noticed my #2 exh valve was pretty damaged. I don't feel like putting any money into this head so either one of my p79's or another p90 will go back on. Here is my question: When putting a different head or a different model head (p90a to a p79 for example) back on this motor is it all the same as long as I put the same sprocket on a different head? Just line up the marked links and use the #1 hole as before. Thanks, I imagine it is the same but never heard anyone discuss it. Quote Link to comment Share on other sites More sharing options...
naviathan Posted September 16, 2007 Share Posted September 16, 2007 Correct, it's all the same. I just swapped my 81 from a P79 to an N42 without changing anything but the head itself. Just don't let the timing chain go slack unless you're ready to tear apart the front of the engine. Quote Link to comment Share on other sites More sharing options...
niner11 Posted September 16, 2007 Author Share Posted September 16, 2007 Thanks, I made a wooden timing chain holder from what a few other posters had described. I think it start at about 1.25 inches wide and tapers into a "V" Might not want to create new MSII maps for the higher compression head so probably going the P90 route..again Quote Link to comment Share on other sites More sharing options...
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