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oil pressure #482154
09/28/09 05:30 AM 09/28/09 05:30 AM
Joined: Feb 2006
Posts: 29
waywardness,u.s.a.
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moprpete Offline OP
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how come after a day at the track,this never hapened before,oil pressure quage,mechanicle,will bounce about 15psi at idle about the same rythem of a cylinder fireing at that rpm?thanx in advance.

Re: oil pressure [Re: moprpete] #482155
09/28/09 04:28 PM 09/28/09 04:28 PM

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oil is dropping 15 psi immediately after each revolution, then shoots back up, why?
Re: oil pressure #482156
09/28/09 04:33 PM 09/28/09 04:33 PM
Joined: Sep 2003
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Sweet Home Alabama
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I was told that was not bad as long as the pressure come back up with the RPM. You should have about 10 lbs for every 1,000 RPM to be safe.

"To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"
Re: oil pressure [Re: MRMOPAR622] #482157
09/28/09 04:39 PM 09/28/09 04:39 PM

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im trying to help ot one of my racer buddies whos at work and cant get to the computer,
problem is that this just started saturday, always has 30 psi at idle now going to 15 psi and at every revolution,psi goes back to 30 psi then down to 15 psi,never seen this before. any idea why?
Re: oil pressure #482158
09/28/09 05:10 PM 09/28/09 05:10 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Only time I ever had that happen was when I spun a
rod bearing
Re: oil pressure [Re: MR_P_BODY] #482159
09/28/09 05:21 PM 09/28/09 05:21 PM

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Quote:

Only time I ever had that happen was when I spun a
rod bearing




we dont hear any noise at all.
Re: oil pressure [Re: MR_P_BODY] #482160
09/28/09 05:32 PM 09/28/09 05:32 PM
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:

Only time I ever had that happen was when I spun a
rod bearing


that was my first thought.

Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: oil pressure #482161
09/28/09 05:35 PM 09/28/09 05:35 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:

Quote:

Only time I ever had that happen was when I spun a
rod bearing




we dont hear any noise at all.



I didnt either.... at first, then the next pass I
heard squealing
Re: oil pressure [Re: moprpete] #482162
09/28/09 05:49 PM 09/28/09 05:49 PM
Joined: Feb 2007
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organ
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maximum entropy Offline
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i had an oil pump that did that. i could actually hear the gauge ticking. i shut it off and fired it up again and it was fine. i put a new pump on it and it never did it again.

for what is the good life if not doing things thoughtfully?
Re: oil pressure [Re: maximum entropy] #482163
09/28/09 06:46 PM 09/28/09 06:46 PM

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could it be the pressure relief spring in the pump, could it be broken.
pressure has always been rock steady.
cold 80 lbs.psi then it goes to 30 psi hot then fluctuates.
Re: oil pressure #482164
09/28/09 07:07 PM 09/28/09 07:07 PM

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could there be a crack in the lifter bore or fully rollarized rocker failure cause this?
Re: oil pressure #482165
09/29/09 06:55 PM 09/29/09 06:55 PM
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waywardness,u.s.a.
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moprpete Offline OP
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chris found the problem.the napa gold 1515 long oil filter base round holes that get close to the inside of the oil pump is alot closer than the shorty 1068 and m.p.4452890 which i have used on this motor for twenty-three years.8/32's verses 9/32's.the bypass rubber from the filter was all in the threads when i took the long one off!restricting the flow hopefully did not hurt it too bad,pray to god the only time ever used the long one since i put manual box in go figure-wifes birthday=mad i'm working on motor

Re: oil pressure [Re: moprpete] #482166
09/29/09 07:38 PM 09/29/09 07:38 PM

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Quote:

chris found the problem.the napa gold 1515 long oil filter base round holes that get close to the inside of the oil pump is alot closer than the shorty 1068 and m.p.4452890 which i have used on this motor for twenty-three years.8/32's verses 9/32's.the bypass rubber from the filter was all in the threads when i took the long one off!restricting the flow hopefully did not hurt it too bad,pray to god the only time ever used the long one since i put manual box in go figure-wifes birthday=mad i'm working on motor



good heads up Pete, what made you think of looking there?

Re: oil pressure #482167
09/29/09 08:06 PM 09/29/09 08:06 PM
Joined: Feb 2006
Posts: 29
waywardness,u.s.a.
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moprpete Offline OP
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waywardness,u.s.a.
gotta go to dinner now.just checking if you seen post,looked at a pummp on my shelf-cut three filters apart and with a depth guage took readings and since iknew only thing i changed was the filter that i knew when i installed it looked too cloose,screw in threads almost even with rubber gasket-would work if pumps were deeper groved-bypass ruuber all over the place short style for my BB from now on!lets hope next event still o.k.

Re: oil pressure [Re: moprpete] #482168
09/29/09 08:20 PM 09/29/09 08:20 PM

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Quote:

gotta go to dinner now.just checking if you seen post,looked at a pummp on my shelf-cut three filters apart and with a depth guage took readings and since iknew only thing i changed was the filter that i knew when i installed it looked too cloose,screw in threads almost even with rubber gasket-would work if pumps were deeper groved-bypass ruuber all over the place short style for my BB from now on!lets hope next event still o.k.



lets go to island sunday, weather permitting. call me tomorrow!

Re: oil pressure [Re: moprpete] #482169
09/29/09 08:31 PM 09/29/09 08:31 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Quote:

chris found the problem.the napa gold 1515 long oil filter base round holes that get close to the inside of the oil pump is alot closer than the shorty 1068 and m.p.4452890 which i have used on this motor for twenty-three years.8/32's verses 9/32's.the bypass rubber from the filter was all in the threads when i took the long one off!restricting the flow hopefully did not hurt it too bad,pray to god the only time ever used the long one since i put manual box in go figure-wifes birthday=mad i'm working on motor



Good catch... I didnt see that you had changed filters

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