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GMC V6 and V12 Engines Engine repair and rebuilding

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  #11  
Old May 19th, 2025, 10:13 PM
James James is offline
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Default Re: Valve train oiling

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Originally Posted by Pfroman View Post
My question is- If I turn the distributor shaft with a drill, will that bring oil all the way up to the special bolt in the head, or will it just bring the oil to the rear cam bearing (priming) for the cam bearing to force it to the head. If I turn the crank by hand will that push any oil up there or do I need significant oil pressure from the pump?
With the head off and with the help of an assistance, cranking the engine with the starter should bring the oil up the hole in the block deck. Be sure the fuel supply is disconnect from the fuel pump to prevent fuel from spraying everything (if electric fuel pump, be sure to pull the fuse) and causing a fire.
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  #12  
Old May 19th, 2025, 11:06 PM
Pfroman Pfroman is offline
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Default Re: Valve train oiling

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Originally Posted by James View Post
With the head off and with the help of an assistance, cranking the engine with the starter should bring the oil up the hole in the block deck. Be sure the fuel supply is disconnect from the fuel pump to prevent fuel from spraying everything (if electric fuel pump, be sure to pull the fuse) and causing a fire.
Thanks James! I'll give it a whirl. Hoping I don't have to tear the whole thing down to get at a cam bearing......
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