HV oil pump
#1628165
06/03/14 05:44 PM
06/03/14 05:44 PM
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Joined: Nov 2008
Posts: 51
Czech Republic
69topless
OP
member
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OP
member
Joined: Nov 2008
Posts: 51
Czech Republic
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Recently, I have noticed having check the oil light ON when idle on stop light at the end of 100 mile round trip with my 69 Polara 383cui. It was first bigger trip after winter storage. Engine properly warmed up and the light turned off as soon as I started moving. If RPM were slightly higher then idle, the warning light went off. Before the trip, the oil were changed, using the same type 15W40, including oil filter. Oil level is correct. I recall to see the check the oil warning light only before cranking the the engine and then turned off, ever since I had a car. I did measurement with the mechanical gauge and the result is not so good. Cold engine, 15psi, bit later it dropped in the range of less then 7psi. Half throttle - 40PSI. I don't have a RPM gauge to verify throttle position, so I just guess but definitely not full throttle. Check short video below http://www.youtube.com/watch?v=w1pC_O6-aPwThe problem might be caused by simple oil pump getting week, or more probably the cam bearings are worn :-/ to solve temporarily the issue I´m considering to replace the oil pump for high volume type plus new hardened driveshaft. Do you have any advice on recommended kit or parts alone? Thank you for help 
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Re: HV oil pump
[Re: 69topless]
#1628166
06/03/14 06:17 PM
06/03/14 06:17 PM
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Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Try switching to 30wt oil. I tried the HV pump route. All I succeded to do was to suck the pan dry on hard runs.
I am truckless..
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Re: HV oil pump
[Re: 340SHORTY]
#1628167
06/03/14 06:22 PM
06/03/14 06:22 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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A new pump alone might do it, I would not be afraid to run the high volume though if you don't rev the engine high. Melling makes a good pump. 
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: HV oil pump
[Re: 69topless]
#1628168
06/03/14 06:25 PM
06/03/14 06:25 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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If that weight of oil was OK before. first try another filter. then shim the spring a bit. As said you might need a slightly heavier grade
live every 24 hour block of time like it's your last day on earth
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Re: HV oil pump
[Re: 69topless]
#1628169
06/03/14 06:34 PM
06/03/14 06:34 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Recently, I have noticed having check the oil light ON when idle on stop light at the end of 100 mile round trip with my 69 Polara 383cui. It was first bigger trip after winter storage. Engine properly warmed up and the light turned off as soon as I started moving. If RPM were slightly higher then idle, the warning light went off.
Before the trip, the oil were changed, using the same type 15W40, including oil filter. Oil level is correct. I recall to see the check the oil warning light only before cranking the the engine and then turned off, ever since I had a car.
I did measurement with the mechanical gauge and the result is not so good.
Cold engine, 15psi, bit later it dropped in the range of less then 7psi. Half throttle - 40PSI. I don't have a RPM gauge to verify throttle position, so I just guess but definitely not full throttle. Check short video below
http://www.youtube.com/watch?v=w1pC_O6-aPw
The problem might be caused by simple oil pump getting week, or more probably the cam bearings are worn :-/ to solve temporarily the issue I´m considering to replace the oil pump for high volume type plus new hardened driveshaft. Do you have any advice on recommended kit or parts alone? Thank you for help
Sounds to me that the engine is wore out. I know that's not what you wanted to hear.
Even if you succeed in getting the light to stay off at idle, by changing the oil or the oil pump. That don't change the fact that the bearings are wore out and you can still spin a bearing with good oil pressure. If that happens then you more than likely will damage the block and crank and rods.
It's kind of like you can pay me now, or pay more later. IMO
Take the money you were gonna spend on a pump and put it toward a rebuild.
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Re: HV oil pump
[Re: 69topless]
#1628170
06/03/14 06:52 PM
06/03/14 06:52 PM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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It probally has worn bearing.But its not a daily driver.My 83 Ram Charger would run about 4 PSI idle hot and maybe 40 running down the road.I put 100K on it with no problems.My 440 that I had done had one rod bent and I mean bent.It still ran to 6500 on a regular basis.A HV pump wont do much for pressure.It just pushes more oil.A High pressure pump will increase pressure.The old GM had low OP problems.They actually sold a factory kit to put larger rotors etc in the pump.I did a bunch back in the 80s.I run HV HP pumps on my stuff.Never sucked a pan dry unless you run at high RPMs for quite a while.Rocky
Chrysler Firepower
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Re: HV oil pump
[Re: 69topless]
#1628171
06/03/14 06:59 PM
06/03/14 06:59 PM
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Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
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IMO, this is the perfect situation for a HV pump.
The INTERNET, the MISinformation superhighway
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Re: HV oil pump
[Re: Challenger 1]
#1628172
06/03/14 07:49 PM
06/03/14 07:49 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:
Sounds to me that the engine is wore out.
 And likely not the pump or cam bearings fault.
Quote:
IMO, this is the perfect situation for a HV pump.
with this too.
And Finally, if this is an occasional driver and not hard on the throttle all of the time. Probably last another 15 years without doing anything.
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Re: HV oil pump
[Re: 69topless]
#1628173
06/03/14 10:09 PM
06/03/14 10:09 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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If you look at the OEM specs for oil pressure you might just find that you are within spec.
As for sucking the pan dry, right. If a HV pump sucks your pan dry your problem isn't the pump.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: HV oil pump
[Re: 62maxwgn]
#1628176
06/04/14 05:25 PM
06/04/14 05:25 PM
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Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
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The HV pump rotors are 1/4" thicker than the standard pump.
The INTERNET, the MISinformation superhighway
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