 Low Oil Pressure, Possible Reasons |
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| EdwardBlume |
 Oct 8 2004, 07:58 PM
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#1
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914 Wizard  Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California 
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My engine has about 6k miles on it after an unknown rebuild. It's very strong but suffers from low oil pressure.
What are the possible causes? Any cures? |
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Replies(1 - 5)
| J P Stein |
Oct 8 2004, 11:37 PM
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#2
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Well........my 2.7L doesn't have the oil pressure it did when I first built it. It's down to about 15 psi at idle.. 2.5 bar at 3K..hot. I've been abusing it some....not getting it up to temp before the first AX pass, ect. Prolly don't have 4k miles on it....most of them are hard miles. Bearings are the usual suspects, I'm afeared (IMG:style_emoticons/default/huh.gif)
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| Jake Raby |
Oct 8 2004, 11:39 PM
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#3
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Oil pressure relief spring is fatigued or the valve its self is not seating corectly... These are two very common causes
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| Brad Roberts |
Oct 8 2004, 11:40 PM
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#4
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Case needed to be line bored during the rebuild but they didnt check it....
Worn out oil pump.... Since your car has No signs of large end rod noise.... I'm going with the main bearing issue. B |
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| Brad Roberts |
Oct 8 2004, 11:41 PM
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#5
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
I *think* I installed new pistons for the relief springs. It didnt help.
B |
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| Mark Henry |
Oct 9 2004, 07:41 AM
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#6
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Jake Raby @ Oct 9 2004, 01:39 AM) Oil pressure relief spring is fatigued or the valve its self is not seating corectly... These are two very common causes (IMG:style_emoticons/default/agree.gif) I did a rebuild (T4 bus) earlier this year the pressure relief valve was not seating proper. I had a ream/refacing tool made and it is now a standard prep service on all my engines. I've also seen a lot of slop in some old T4 pumps. |
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