Help! Crank only turns 180°
08-31-2011, 02:35 PM
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Help! Crank only turns 180° So after several months, my mechanic has finally finished preparing my 02 z28. It arrived with the heads on, but lots needed to be done. He pre lubed it today and when he went to turn the crank manually , it only turns 180° in either direction before it locks up. what would cause this?
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08-31-2011, 03:58 PM
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The cam gear and the crank gear for timing, are COMPLETELY incorrectly installed. My car did this but it was because a 4 in crank doesnt clear a Canton oil pan with out a little love.
08-31-2011, 07:57 PM
#15
Make sure you dont have a pushrod sitting on the edge of the lifter, I had this happen and made me look like a dumbass for about an hour on my LT1.
The valve is opening very early because the pushrod is too long because its not sitting down in its cup in the lifter.
Look at the pushrod it will look slightly crooked, you can look straight down the pushrod with a flashlight.
The valve is opening very early because the pushrod is too long because its not sitting down in its cup in the lifter.
Look at the pushrod it will look slightly crooked, you can look straight down the pushrod with a flashlight.
09-01-2011, 03:58 PM
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no, it's not the pushrods, it still does this when we took all the rocker arms off. the crank rotates a little bit, and then it's like it hits a solid object. turn it the other way, and same thing.
my builder is going to pull the heads and see what happened.
my builder is going to pull the heads and see what happened.
