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Restoration & Repair Tips Board

Priming a 350 chevy.

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Pat Cruise

11-18-2006 15:33:02




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Can anyone tell me how long it should take to get oil to the rocker arms when primimg a 350 chevy with a high speed drill.Been going off and on for 20 minutes and only have oil to two rocker arms so far. HELP!!!!




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KEB

11-23-2006 09:53:36




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 Re: Priming a 350 chevy. in reply to Pat Cruise, 11-18-2006 15:33:02  
Once you have oil in the oil pump, just finish re-assembling the engine. Before your start it, take the spark plugs out & spin the engine over with the starter until is shows oil pressure. Assuming you used assembly lube so nothing is actually starting dry, you're all set to go.

Keith



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Bob

11-20-2006 00:06:09




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 Re: Priming a 350 chevy. in reply to Pat Cruise, 11-18-2006 15:33:02  
1.) Are you using a priming tool, or simply a shaft with a flat on the end, to drive the oil pump? The distributor extends though one of the lifter oil galleries, and without the distributor in place, or using a priming tool, the oil will dump out of the gallery and return to the pan through the distributor hole.


2.) Assuming you are using the correct priming tool, it is NOT necessary to prime long enough to get oil to the rocker arms, though the lifters. All that is needed is to pre-lube the main, rod, and cam bearings. The rocker arms can be lubed by simply slathering oil on them. They will oil QUICKLY once the engine is started, and the valve train is in motion.

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B-maniac

11-19-2006 17:35:03




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 Re: Priming a 350 chevy. in reply to Pat Cruise, 11-18-2006 15:33:02  
Did you put new lifters in it? There is relatively little oil goes up there and what does has to go through the lifters first. If they are new,it will take a while to fill them. Especially if you have the rockers backed out with poly-locks on them. I would have to assume the pushrods are new or have had the oil gallery cleaned out.Have you got a guage on it to see just how much pressure you are getting with the drill?

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Pat Cruise

11-19-2006 18:14:32




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 Re: Priming a 350 chevy. in reply to B-maniac, 11-19-2006 17:35:03  
Unfortunately the lifters and push rods are not new and are original to the motor. The engine had a bad head on it so they were replaced with another set and all the gaskets and seals have been replaced as well. The engine had set for about a year and I didnt want to start it up dry so I figured I would prime it first. I dont have a pressure gauge to check the pressure of the pump but with one little squeeze of the drill I endwed up with oil on my ceiling which is 10 feet. Im just trying to get it running again so I will have a spare vehicle if I need it.

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bradk

11-18-2006 15:38:29




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 Re: Priming a 350 chevy. in reply to Pat Cruise, 11-18-2006 15:33:02  
Most of the time,you have to turn the engine over in 90 degree intervals a few times by hand before they all get oil.~brad



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Pat Cruise

11-18-2006 15:42:12




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 Re: Priming a 350 chevy. in reply to bradk, 11-18-2006 15:38:29  
So its probably safe to say that since I took the oil pressure sending unit out and am now cleaning oil off my ceiling in my garage that this engine should run okay on this pump???? Yeah Im pretty embarrassed!!!!



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B-maniac

11-19-2006 19:38:51




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 Re: Priming a 350 chevy. in reply to Pat Cruise, 11-18-2006 15:42:12  
Sorry for the mess. I guess if your original question was more in reference to how to make sure you had oil pressure or not,I could have told you an easy way to do that. But , You asked how long it should take and why you can't get oil to your rocker arms. Completely different question. Sometimes a dirty old chevy small block with a lot of miles and gunk won't show oil at all out of some of the rockers until 2000 or 3000 rpm. Lot of info you didn't give us. Good Luck.

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brad_bb

11-21-2006 13:13:06




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 Re: Priming a 350 chevy. in reply to B-maniac, 11-19-2006 19:38:51  
Last one I primed was my 1955 265 V8 engine (basically same as 350). It did take a little bit before I started seeing oil at the rockers - 2 minutes maybe? Seemed like awhile. The first time I primed a small block chevy, like you just tried to drive the pump and no oil was coming up. I finally realized on my own what the problem was and broke down and bought a priming tool(they"re not much actually).

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