Quote:
Originally Posted by theo
Small block Chevy uses hydraulic lifters. You need to add some pre-load to them; there is no "gap" to set. The guy on the other forum is right - rotate the cam until the lifter is on the heel of the lobe, bring the adjustment down until you have zero clearance, then go another 1/4 turn. Anything from 1/8 turn to 3/4 turn should be fine. My own machinist/race builder goes 1/2 turn on stock GM hyrdraulic lifters.
The tricky parts are rotating the cam to the right place and finding zero lash. Also, the lifters are collapsible, so you need a soft touch when you're spinning the pushrod. You should also be feeling for lash (up/down movement) and going slowly. HTH
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Howdy! I agree there is no gap on hydralics. There IS a gap on solid lifters, as that is what creates the rattling sound on them. Still sounds like a vacuum leak. Did you use the 4 piece gasket set for the intake manifold? If so, the small section on the front and rear are a royal pain to get on just right. BTDT, x3. Also, as mentioned, there are different intakes for different carbs. Are the throttle plates hitting the manifold on the primaries? You may need an adapter plate to mate these up. John
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