Re: Engine turns but will not fire up after re-adjusting the rocker ar
Yes, if you get them too tight you don't get any compression on startup. It is possible you started adjusting them with #6 at TDC instead of #1 if you did it after a couple of cocktails like I've been known to do.
Here's how I set mine with a not-too-radical cam:
Set the engine at TDC for #1. Verify by pulling the distributor cap to see that the rotor is at #1. Or since you have the covers off, rotate the engine clockwise so the marker passes through 0 on the timing tab and one of the #6 valves starts to rock, you are on TDC for #1. Then turn the motor back counter clockwise to the 0 point.
I find zero lash by doing the following:
Use a 0.0015 feeler gauge between the valve and rocker tip. Turn the rocker nut down by hand (if possible) while sliding the feeler gauge in and out. When there is a slight drag on the feeler gauge, stop. Tighten the rocker nut down 1/2 a turn from this point. (I use 3/8 turn on my lumpy cam). If you get a little tick, no biggie. I'd rather have one a tad loose than a tad tight.
Adjust the following rockers:
Rotate the engine one full turn clockwise to get the balancer mark back at 0. Adjust the following rockers:
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled