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Old 10-21-2006, 03:51 PM
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How close are the springs to coil bind at max lift? Also retainers may be hitting tops of guides.

I saw this happen once with Rhodes lifters, engine would idle all day long soon as it was revved up cam key would shear off. Not a bent pushrod but maybe pushrods are the "fuse" this time.

Are you using the correct lifter and pushrod combination?
Seems to me the Vortec big blocks use different lifter & different pushrod length than the earlier gen 4 big blocks.

Last edited by Greg Latvala; 10-21-2006 at 03:57 PM.
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