Guest butlersZ Posted August 20, 2004 Share Posted August 20, 2004 This question comes from a friend, I don't know the answer so I thought I would post it here and see what you guys think. OK,friends building a 350 for his Z and he is being dirt cheap with it so he can get it going. I had an old cam laying around from a 283 from '64 and it was in really excellent shape so he asked if he could use it and I just gave it to him to use. He puts in the cam aligning the timing marks on the new timing gears and puts the rest of the motor together. Now we go to turn it over with a ratchet to test the compression. Now the tricky part, with compression being excellent we put it back at TDC on compression stroke to set in the distributor and the timing marks on the timing gears are misaligned at TDC. Why is this? There is compression and everything seems to be working right except for the misalignment at TDC??? Quote Link to comment Share on other sites More sharing options...
jt1 Posted August 20, 2004 Share Posted August 20, 2004 The dots aren't supposed to line up at TDC; they generally line up 30 or 40 deg before TDC IIRC. As long as the center of the crank, cam, and the two dots line up you're fine, but it's not at TDC. And it doesn't matter if the dot on the cam gear is at the top or the bottom. The dot on the crank gear should always be on the top. John Quote Link to comment Share on other sites More sharing options...
Guest butlersZ Posted August 21, 2004 Share Posted August 21, 2004 I thought the dots would always line up at TDC compression stroke because thats what you do when you put the cam in right? maybe I'm getting and loosing my mind. Anyway, problem solved, my friends motor in his new hybridZ runs fine. Quote Link to comment Share on other sites More sharing options...
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