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#1 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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OK, new one by me...and I have a few ideas rollin around in my head as to why...
At idle, my oil pressure guage (new aftermarket mechanical unit) is fine...reading steady at 20ish. When i go down the road...or soimply increase RPM's, it quivers...it's too fast to simply say a fluctuation... more of a quiver. It's only a 4 PSI differance...but curiouse as to why. |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Hmmmmm, now it is acting fine.
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#3 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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I am assuming that you have eliminated the gauge as a problem so it is possible that there is some problem in the oiling system. The last engine that I saw with fluxuating oil pressure had lost its oil pump pick up screen. At an idle the oil was getting back to the pan fast enough to keep the pump submerged but at any rpm the oil was not returning fast enough. The result was cavitation of the pump because it was sucking air causing the fluxuation.
Did you try another gauge on it to eliminate that possibility? Jim |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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actually just got done doing that...
The pick up was removed and cleaned and inspected about 1000 miles ago, there are no press on parts, and I used thread locker on the bolts... ![]() |
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#5 |
'67 K10 Work In Process
Join Date: Feb 2004
Location: Delano MN
Posts: 163
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It may be air on the oil line running to the gauge. The air is more compressable under pressure than the oil so any slight pulsing from the pump will be amplified at the gauge.
If you used the clear plastic line from the engine to the gauge you should be able to see the air bubbles. Unfortunately the only way I know to fix it is to crack the line loose at the gauge and start the engine to allow air to escape and fill the line with oil then tighten line. Do this with the engine cold because it can/will be messy but if oil is cold at least you wont get burned. |
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#6 |
Senior Member
Join Date: Jan 2005
Location: Loveland Co.
Posts: 3,098
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I've had times before after oil changes when it is hot out I get air in the line and when I stop gauge goes to zero. Not at every stop, just one time, but I've had it happen after two different oil changes.
__________________
Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html |
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
I'm still kinda lost on this...it hasn't done it again... just that one day.
I hate problems that fix them selves...they always come back and bite you in the 12 bolt when you can least afford it. |
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#8 |
Registered User
Join Date: Dec 2004
Location: Aztec, NM
Posts: 388
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Sounds like an oil filter problem to me.
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Well, the oil pressure isn't abnormally high, like it was on the bypass valve or anything like that...and it is a 1000 mile old Wix filter...
That could be the issue, but I don't see it as being too likely Last edited by Longhorn Man; 09-26-2005 at 12:01 AM. |
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#10 |
Account Suspended
Join Date: Feb 2004
Posts: 3,051
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My vote is for air, from when you changed the oil pressure guage.
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