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Author
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Topic: why is my oil pressure dropping?
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white1990stang
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Member # 2307
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posted
 
 
When i accelerate to 3000 or so and then let off without shifting my oil pressure is dropping pretty low. do i have bad valve guides/seals?
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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JoeT
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Member # 298
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no, but your bearing tolerances have probably opened to the point that the oil pump can no longer maintain the required oil pressure unless you rev it up.
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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white1990stang
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Member # 2307
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what does that mean? the lower end has only 35,000 miles on it.
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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mtbaughs
Road Racer
Member # 4052
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what weight oil is in it?
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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white1990stang
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Member # 2307
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posted
also when i get on it and go up to 4000+ the oil pressure will start dropping a little.
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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JoeT
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Member # 298
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in order to maintain oil pressure, the motor has to have bearing tolerances within a certain tight range. As the motor wears, the tolerances open up and the motor can no longer maintain a decent oil pressure.
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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white1990stang
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Member # 2307
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posted
should i worry about it? the oil is 10-40
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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JoeT
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Member # 298
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if you are very lucky, you can replace the stock oil pump as it could be failing. If you can't maintain 20 PSI at idle you are probably in trouble in the not too distant future
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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mtbaughs
Road Racer
Member # 4052
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posted
10-40 should be alright. I usually run 20-50 synthetics in a performance pushrod car. On such a new motor it is odd to be losing pressure as you are. Are you going off the stock gauge or an aftermarket gauge?
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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HYPERSVT
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Member # 1707
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quote:
Originally posted by shade-:
if you are very lucky, you can replace the stock oil pump as it could be failing. If you can't maintain 20 PSI at idle you are probably in trouble in the not too distant future
Mine has been low for over a year. WAY under 20psi. At a light after I hammer it, It will go ALL the way down but as soon as I accelerate its fine. Obviously thats not "right" but I wouldnt do replacing the oil pump yet. I dont even see how you could do that without seriously jacking up the motor or removing it all together.
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Lincoln LS V8
2004 CRF 230
Posts: 261 | Registered: Aug 2002
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white1990stang
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Member # 2307
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posted
it is off the stock gauge. i have n autometer one on the way. also my car did this kinda before with my stock heads. i changed them to my tfs high ports and it went away. but they only have 15,000 or so miles on them.
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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mtbaughs
Road Racer
Member # 4052
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posted
quote:
Originally posted by HYPERSVT:
quote:
Originally posted by shade-:
if you are very lucky, you can replace the stock oil pump as it could be failing. If you can't maintain 20 PSI at idle you are probably in trouble in the not too distant future
Mine has been low for over a year. WAY under 20psi. At a light after I hammer it, It will go ALL the way down but as soon as I accelerate its fine. Obviously thats not "right" but I wouldnt do replacing the oil pump yet. I dont even see how you could do that without seriously jacking up the motor or removing it all together.
You support the motor with a brace and drop the K-member out and front suspension. It's about 8 hrs of work
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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MR GO FAST
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Member # 2088
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If it matters I have had 20psi at idle and about 38lbs at 3000rpm and above since I bought my 86. It now has 188k on it. I have put 23k on it since I bought it back in november. She runs goods but I am having a motor being built for it just in case. ![[Big Grin]](biggrin.gif)
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1986 Gt that is faster than FOSTANGS pinto
Posts: 3729 | From: ATWATER/SANJO/RWC | Registered: Nov 2002
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white1990stang
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Member # 2307
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posted
does it drop at all past a certain rpm?
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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MR GO FAST
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Member # 2088
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posted
quote:
Originally posted by white1990stang:
does it drop at all past a certain rpm?
nope...it climbs good to 35-38 ish and never past it. I run 20/50 oil in it
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1986 Gt that is faster than FOSTANGS pinto
Posts: 3729 | From: ATWATER/SANJO/RWC | Registered: Nov 2002
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biggmatt
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Member # 1124
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i bet the gauge is fucked
Posts: 392 | From: pittsburg | Registered: Apr 2002
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