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#1454172 Mon Jun 06 2022 01:02 PM
Joined: Nov 2002
Posts: 394
O
ol' 55 Offline OP
'Bolter
Have got a friend that has installed a brand new 350 crate motor into his 69 chevy pick up. It has run for about 3 to 4 minutes with no oil pressure? It has the front oil cooler and later model lines and stuff, hopefully this was ok to post this problem here. He claims that he primed the pump with and old dist..

ol' 55 #1454199 Mon Jun 06 2022 03:13 PM
Joined: Apr 2005
Posts: 10,970
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
If he indeed has no oil pressure he has probably trashed the engine running it that long. He needs to tap in a secondary oil pressure gauge and briefly start the engine. If pressure great. If no pressure, he’s in for a tear down and rebuild. Since he’s working on a ‘69 Chevy P/U posting here is just fine.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2) “Emily”
‘39 Dodge Businessmans Coupe “Clarence”



"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
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ol' 55 #1454203 Mon Jun 06 2022 03:34 PM
Joined: Feb 2004
Posts: 24,752
H
Kettle Custodian (pot stirrer)
If the engine was not put under a load or accelerated above idle, he might have dodged a bullet. Try pulling the distributor and repeating the oil pump spin. If there's proper oil flow, the drill motor running the pump should load down noticeably, enough to make the drill hard to hang onto. It's possible the pump drive shaft has failed, or the distributor might not have been seated into the shaft correctly. I've also seen a new oil pump fail to prime itself if it's not packed with vaseline or oiled before installation. Bottom line- - - -at least pull the oil pan and inspect the bearings. If the crankshaft isn't scored, it might be a good idea to change the rod bearings. Mains are usually pretty durable, unless the engine is under load when the oil pressure goes away.
God luck!
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

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

WAG MORE- - - - - -BARK LESS!
ol' 55 #1454269 Tue Jun 07 2022 01:29 AM
Joined: Dec 2018
Posts: 1,719
F
'Bolter
ol55 Did it knock or screach any ?? If not might be OK should be able to bring the oil pressure up even with a speed handle,we used to do it that way.Some meechanics pack the pump I never did.

ol' 55 #1454407 Wed Jun 08 2022 06:01 AM
Joined: Jan 2022
Posts: 20
O
'Bolter
Say, the old guy at the parts store told my pal to drain the 5w 30 o and try some thicker oil, like maybe some straight 40 weight until it got pressure. Does that make sense, of course trying the drill motor.

ol' 55 #1454440 Wed Jun 08 2022 03:58 PM
Joined: Feb 2004
Posts: 24,752
H
Kettle Custodian (pot stirrer)
RUN- - - - -do not walk away from 5W-30 oil. It's approximately the consistency of water when it's cold, and it does not get "thicker" as it heats up. Try 15W-40 instead, or straight 30 weight. That being said, simply increasing the thickness of the oil will only hide the problem, not cure it. If spinning the oil pump with a drill motor doesn't solve the pressure problem, open the engine up and check for obvious leaks in the oil circuit. I once discovered the oil gallery plugs behind the camshaft sprocket missing on a freshly assembled 283. That one had no oil pressure whatsoever on startup and wouldn't build pressure by spinning the pump.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

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

WAG MORE- - - - - -BARK LESS!
ol' 55 #1454541 Thu Jun 09 2022 02:58 AM
Joined: Jan 2022
Posts: 20
O
'Bolter
Well my pal brought home 5 qt. Jug of 20W 50 valvoline would that be efficient?

ol' 55 #1454544 Thu Jun 09 2022 03:13 AM
Joined: Feb 2004
Posts: 24,752
H
Kettle Custodian (pot stirrer)
Yes, that will work, but he's probably just delaying the inevitable. I'd strongly suggest pulling the oil pan and inspecting the bearings unless he's the type who bets big in a high stakes poker game when he's holding a mediocre hand! A little labor now might prevent a disaster later.
Jerry


"Freedom's just another word for nothing left to lose"
Kris Kristofferson

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

WAG MORE- - - - - -BARK LESS!
ol' 55 #1454554 Thu Jun 09 2022 11:05 AM
Joined: Jan 2022
Posts: 20
O
'Bolter
Thanks there Ol buddy. Only man to drive a frozen whale over the Grapevine.

ol' 55 #1454713 Fri Jun 10 2022 06:38 PM
Joined: Oct 2012
Posts: 54
F
'Bolter
Had that problem on a early El Camino and found that there is I believe 3 different length drive rods for the oil pump got the right length and away we went!


1936 GMC T-14 restro-mod
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