mr jdm Posted May 4, 2009 Share Posted May 4, 2009 Hey Im currently dropping a built sr20 into my rhd 280z. Anyway, I was doing head studs and a head gasket on the motor. I followed the FSM step by step. TDC 2nd mark from left on pulley Turned the motor over til the grey links lined up with the dots on the crank sprocket. Now when im going back to re-install. THe intake cam goes in at 10 o clock, and the exhaust at bout 12 o clock. When the exhaust cam goes in at 12, one of my Lobes is pushing on a rocker and I have to torque it down like that in order for it to stay at 12. The cams btw are tomei 272 12.5mm lift, the chain was never dropped down and was always held with a lot of tension Otherwise, the exhaust cam sits good at about 11 o clock, but when this is finally installed my chain looks this without the chain tensioner in, but I dont think the chain tensioner installed will removed the slack in the middle because it only takes it out from the left side when your facing the motor. Should my chain sit like this lined up, or should there be more tension up top before installing the tensioner? Im guessing if it your chain has that much slack in it then it skipped a tooth on the bottom to the left or right? Quote Link to comment Share on other sites More sharing options...
Careless Posted May 4, 2009 Share Posted May 4, 2009 your intake looks about 10:30, and the exhaust about 12:15. did you align the lower sprocket properly? it may be a tooth too advanced, and causing the cams to develop a bit of slack. in a normal situation, as long as the timing marks are lined up on the chain and whatever markings on the head, it will be ok... but someone with definitive SR20 experience will be here shortly... Quote Link to comment Share on other sites More sharing options...
DRZ man Posted May 4, 2009 Share Posted May 4, 2009 It has to be 12 links apart front cam to cam, or use the marks like you got them, there is another mark on the bottom, I dont know if you have the front cover on but I like to take it of when doing timing on sr20. Quote Link to comment Share on other sites More sharing options...
mr jdm Posted May 5, 2009 Author Share Posted May 5, 2009 na i dont have the front cover im going to be taking it off soon, Ive been busy workin on the chasis. Quote Link to comment Share on other sites More sharing options...
chris556452 Posted May 5, 2009 Share Posted May 5, 2009 I used this link to install cams on my SR20, everything turned out fine... I think you'll be ok with yours, mine had some slack up top too. http://www.frsport.com/Installing-Tomei-Poncams-on-S13-SR20DET_t_35.html Quote Link to comment Share on other sites More sharing options...
mr jdm Posted May 29, 2009 Author Share Posted May 29, 2009 alright, this is exactly what I did. I followed the FSM, installed the cams and rotated the motor over a few times. At TDC my chain looks like this. As soon as I turn the motor a tiny tiny bit clockwise, slack appears. The chain tensioner is completely released, is this ok? Cause it doesnt seem normal and a long time ago I brought a motor to a shop and they told me the timing was wrong and this exact situation was going on. Any advice? Quote Link to comment Share on other sites More sharing options...
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