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Re: Getting ready to replace GPs
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Is the crankshaft bolt on the harmonic balancer?
I plan on disconnecting the batteries. is there anything else I should disconnect before manually turning the engine?
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It's the big bolt that holds the harmonic balancer to the crankshaft. Right in the middle of the big bottom pulley. It should turn over fairly easily with a long breaker bar or ratchet. You only get compression when the engine is turning fast, turning slow all the compression just leaks past the piston ring gaps.
No need to disconnect the batteries unless you really want to. You SHOULD disconnect the Fuel Shutoff Solenoid for safety.
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1985 International rollback, 6.9L 5 speed "Li'l Big Truck"
*ASE Master Certified, Medium & Heavy Trucks*
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