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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2014 Posts: 120 'Bolter | | 'Bolter Joined: Sep 2014 Posts: 120 | I acquired a used 261. I am currently bench testing it.
Engine starts on first revolution. Runs strong, no smoke.
With valve cover off, I see no oil coming out of the small tube curling over the rocker arm.
That concerns me.
I removed the in and out connection from the oil filter but get no oil flowing there either when engine is running.
Does the oil pump require it to be “primed” and if so, how to do that.
Any advice appreciated.
Skinnedknuckles
1 1951 Chev Panel with a 350 small block, automatic tranny.
1 2004 Chev 2500 HD pickup... stock
1 1950 Chev 5 window pickup; 261 c.i. engine, 4 on the floor.
With lots of time and money, any Stovebolt can be restored.
| | | | | Joined: Mar 2019 Posts: 1,003 'Bolter | | 'Bolter Joined: Mar 2019 Posts: 1,003 | Dumb question... Is there oil in it? If you had it running, you should of, in short form, have oil moving. Pull da pan. See what in there. Or whats not?  | | | | | Joined: Feb 2004 Posts: 29,863 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,863 | What's the oil pressure at the main oil gallery fitting at the driver's side of the engine just behind the exhaust flange? If you don't know, find out. No oil at the filter line is NOT a good sign. Don't try to run the engine any more until you figure out what's going on. Has the distributor been removed recently? If it's not seated properly in the block, the engine will run but the oil pump won't turn.
How big are the oil lines going to and from the filter? If the engine is set up for "full flow" filtering, the oil filter canister will be very large, and there will be BIG metal lines going to and from the filter. A "bypass" filter will have a smaller housing, and small-diameter flexible lines at the inlet and outlet.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2017 Posts: 671 'Bolter | | 'Bolter Joined: Aug 2017 Posts: 671 | Can he Remove distributor and use the drill with large flathead piece to see if oil will flow up to rocker arms? I did that on my 235 Before fire up.
Todd
1950 Chevy 3100
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