Re: Weird problem..oil pump regulator??
[Re: BSB67]
#958465
03/25/11 08:13 PM
03/25/11 08:13 PM
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Joined: Oct 2010
Posts: 606 Montana
Yancy Derringer
mopar
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mopar
Joined: Oct 2010
Posts: 606
Montana
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Quote:
If the oil pressure went from 35 to 80 at idle, it not the spring or relief valve. The relief was not open at 35 to begin with.
This doesn't make sense. If it was 35, of course it could have been open. Now that it's high, it could be plugged.
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Re: Weird problem..oil pump regulator??
[Re: 1_WILD_RT]
#958468
03/25/11 09:53 PM
03/25/11 09:53 PM
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Joined: Oct 2010
Posts: 606 Montana
Yancy Derringer
mopar
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mopar
Joined: Oct 2010
Posts: 606
Montana
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Quote:
Quote:
Quote:
If the oil pressure went from 35 to 80 at idle, it not the spring or relief valve. The relief was not open at 35 to begin with.
This doesn't make sense. If it was 35, of course it could have been open. Now that it's high, it could be plugged.
The only way that works is if the valve didn't close fully possibly due to a burr or something of that sort, otherwise low pressure won't open the valve because the spring pressure is constant... It was lifting @ 80 psi.... If the valve opens at 35 psi the pressure wouldn't rise above 35 psi unless the pump volume was so great it overcomes the flow capacity of the relief passage... Pressure rising typically indicates a place where oil was previously able to leak internally has become sealed... That could indicate a number of causes including plugged rocker feed, a spun bearing, a plugged chain oiler..
Scuse me you are correct, I was thinkin' basackwards. Yep. low idle pressure indicates the pump cannot keep up with "the leaks" because normally at low pressure the bypass will be closed. Now that it's high, SOMETHING in there has plugged
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Re: Weird problem..oil pump regulator??
[Re: 1_WILD_RT]
#958469
03/26/11 01:00 AM
03/26/11 01:00 AM
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Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
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Quote:
Quote:
Quote:
If the oil pressure went from 35 to 80 at idle, it not the spring or relief valve. The relief was not open at 35 to begin with.
This doesn't make sense. If it was 35, of course it could have been open. Now that it's high, it could be plugged.
The only way that works is if the valve didn't close fully possibly due to a burr or something of that sort, otherwise low pressure won't open the valve because the spring pressure is constant... It was lifting @ 80 psi.... If the valve opens at 35 psi the pressure wouldn't rise above 35 psi unless the pump volume was so great it overcomes the flow capacity of the relief passage... Pressure rising typically indicates a place where oil was previously able to leak internally has become sealed... That could indicate a number of causes including plugged rocker feed, a spun bearing, a plugged chain oiler..
How about a piece of debris wedge into the valve and the pump channel keeping the valve locked closed, like it is when the motor is shut off
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Weird problem..oil pump regulator??
[Re: Cab_Burge]
#958470
03/26/11 01:05 AM
03/26/11 01:05 AM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
Quote:
Quote:
Quote:
If the oil pressure went from 35 to 80 at idle, it not the spring or relief valve. The relief was not open at 35 to begin with.
This doesn't make sense. If it was 35, of course it could have been open. Now that it's high, it could be plugged.
The only way that works is if the valve didn't close fully possibly due to a burr or something of that sort, otherwise low pressure won't open the valve because the spring pressure is constant... It was lifting @ 80 psi.... If the valve opens at 35 psi the pressure wouldn't rise above 35 psi unless the pump volume was so great it overcomes the flow capacity of the relief passage... Pressure rising typically indicates a place where oil was previously able to leak internally has become sealed... That could indicate a number of causes including plugged rocker feed, a spun bearing, a plugged chain oiler..
How about a piece of debris wedge into the valve and the pump channel keeping the valve locked closed, like it is when the motor is shut off
The thing is the reason the pressure is lower at idle is because enough leakage occurs at all the normal internal leak points IE bearings,rockers, lifters & what not that the pump doesn't move enough volume of oil to create enough pressure to lift the relief valve so if the valve was jammed shut the pressure would still only be 35 psi.. But at higher rpm's the pressure could easily see 100+ psi...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Weird problem..oil pump regulator??
[Re: Cab_Burge]
#958474
03/26/11 04:15 PM
03/26/11 04:15 PM
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Joined: Feb 2005
Posts: 4,313 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Quote:
Quote:
Quote:
Quote:
If the oil pressure went from 35 to 80 at idle, it not the spring or relief valve. The relief was not open at 35 to begin with.
This doesn't make sense. If it was 35, of course it could have been open. Now that it's high, it could be plugged.
The only way that works is if the valve didn't close fully possibly due to a burr or something of that sort, otherwise low pressure won't open the valve because the spring pressure is constant... It was lifting @ 80 psi.... If the valve opens at 35 psi the pressure wouldn't rise above 35 psi unless the pump volume was so great it overcomes the flow capacity of the relief passage... Pressure rising typically indicates a place where oil was previously able to leak internally has become sealed... That could indicate a number of causes including plugged rocker feed, a spun bearing, a plugged chain oiler..
How about a piece of debris wedge into the valve and the pump channel keeping the valve locked closed, like it is when the motor is shut off
I think you need to read the original post again and think about it
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