We're putting toghether a short block and dropped the crank in. The crank is 10 over. We bought main bearing caps that were 10 over from AutoZone. Torqued them down to 70lbs and now the crank takes a lot of force to move. It gets a lot of harder to turn when the main cap gets bolted on. The "small" 4 caps dont affect it that much. We checked the bearing and it all it says is Clevite 77 there's no 010 or 10 on it. Could it be they gave us the wrong bearings ? What else could be wrong ?

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92 Z28 5.7
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Ported stock heads, XR270HR-10 cam, TES headers
Crane AFPR, Flowmaster catback, MSD ignition
#24 SVO injectors, 1LE aluminum driveshaft.

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I assume you mean main bearings(not caps)from autozone??If your crank has been cut .010 under,your bearings will have to say .010 somewhere on the back of the shell!If it does not,then they are not the right ones for your application.This is what is causing the crank to lock as you torque the main caps.Go back to Autozone and get the right bearings(.010),install,and you should then be able to torque your caps down (all of them) and spin the crank over by hand.When i built my motor I was able to turn it over by the crank snout(by hand) easily.Hope this helps you out.

 

Blade,

I hope you meant to say "0.010" UNDER", not over. It is possible that the bearing inserts are standard, but that would only give you more clearance, not less. Mic the crank again and check the bearing bores with a caliper or bore gauge. That should tell you right away.

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Later,
Vader
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