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09-11-2022, 09:02 PM | #21 |
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Re: Oil pressure problem
The way I see it, without that pickup added, the effective oil level is 1 1/2" lower, and the pump could easily cavitate through not having the pickup low enough in the pan. I think that is your problem Rudolph.
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09-11-2022, 09:44 PM | #22 | |
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Re: Oil pressure problem
Quote:
Should there be some kind of seal on the oil pump to block? |
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09-11-2022, 10:05 PM | #23 |
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Re: Oil pressure problem
No seal pump to block
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09-11-2022, 10:30 PM | #24 | |
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Re: Oil pressure problem
Quote:
His situation is different (he has a modified block that forces the oil out one port, through the filter and back into the oil galley) - it is not a bypass style system. |
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09-11-2022, 10:32 PM | #25 |
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Re: Oil pressure problem
I always run a 49-53 style oil pump with this pickup/screen (that you can buy at Speedway) - which beats having to cut/splice one up:
https://www.speedwaymotors.com/Speed...en,413758.html |
09-12-2022, 12:31 AM | #26 |
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Re: Oil pressure problem
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09-12-2022, 03:48 AM | #27 |
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Re: Oil pressure problem
I'd say just fit that pickup part and see what happens. There should be gaskets between the pickup tube and the can and the can and the pump adaptor. (I think).
I have had some success fitting O rings at the base of the pump. The French pump uses an O ring here. I use 3 smaller O rings and make sure the pump fits flush. Mart. |
09-12-2022, 02:24 PM | #28 | |
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Re: Oil pressure problem
Quote:
I wonder to if the relefe valve is sticky? The one in the front of the block. I am going to dedicate this week to the problem |
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09-12-2022, 03:07 PM | #29 | |
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Re: Oil pressure problem
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09-12-2022, 09:46 PM | #30 |
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Re: Oil pressure problem
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09-13-2022, 02:13 AM | #31 |
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Re: Oil pressure problem
I cut oil filter #3 open, engine has probably done 350 miles, no bearing chunks, was a slight amount of small partials in the puddle in the bottom of the filter housing but probably ok for an old engine witch is still running in,
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09-14-2022, 10:46 PM | #32 |
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Re: Oil pressure problem
I put that pick up tube inside the screen holder and got a copper oil pressure gauge line and moved it down to the filter outlet and not the block, also got a better quality non automotive oil pressure gauge and took it apart and brazed on a tube for a light bulb and deleted the brand name from the face.
I am running 20W50 oil now, for the temperature and the hard grind up the hills, about 10 psi difference when at idol but it dosnt go over 40 psi. |
09-14-2022, 11:55 PM | #33 |
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Re: Oil pressure problem
it didn't go over 40 lbs before did it? Hopefully you've sorted it once and for all.
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09-15-2022, 05:18 AM | #34 |
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Re: Oil pressure problem
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09-15-2022, 07:42 AM | #35 |
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Re: Oil pressure problem
Have the baffles in the oil pan been removed? If so oil may be moving away from the oil pump pick up. There should be a gasket between the round metal cup and the oil pump body
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09-15-2022, 01:42 PM | #36 |
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Re: Oil pressure problem
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12-12-2022, 04:10 PM | #37 |
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Re: Oil pressure problem
I took the releaf valve out just to be on the safe side and found compared to another spring and plunger it was a bit different in every dimension, I had a brand new springs the correct length and a plunger out of another motor, installed it and oil pressure behavior is dramatically different, it seems to stay at 30 psi at 1000 rpm instead of 45 psi.
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12-12-2022, 05:04 PM | #38 | |
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Re: Oil pressure problem
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12-12-2022, 10:38 PM | #39 |
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Re: Oil pressure problem
The top of the plunger I removed from the motor is more pointy, i think it may of been hanging up on the side of the tapper and not seating sometimes.
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12-29-2022, 09:28 PM | #40 |
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Re: Oil pressure problem
Went for a drive, weather is pretty hot, has about 30 or more psi when Starting from cold, when it warmed up it dropped down to 25 psi at idol and and is around 27 at 1000 rpm, its very steady now, I am thinking that heavy spring may have been something to do with the funny readings.
Last edited by Rudolph; 12-30-2022 at 01:40 AM. |
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