 losing oil pressure, after a drive |
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| toon1 |
 May 19 2008, 05:58 PM
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#1
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Senior Member  Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022  |
At first startup, I wil have 65psi. if i just tool around town, the pressure will stay in the 10 to 15psi range at idle. Normal pressure when warm and at ~1500-2500rpm is 45-48.
after a freeway drive, and the car comes back to idle, the pressure drops to 0. I've installed a NEW RAT 30mm NON full flow oil pump with .005 clearance on the front cover. Oil is BP 20/50w CHT are in the 350-360 range oil pressure gauge is a dakota digital. I have a stock oil temp gauge and I have never seen it go much past the middle towards the hot side. All the clearances on the rebuild where at STD. Oil bypass springs where installed the right way. Any suggestions would be helpful. Thank's,Keith |
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Replies(1 - 10)
| TravisNeff |
May 19 2008, 06:19 PM
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#2
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914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region 
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does the green idiot light come on as well?
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| r_towle |
May 19 2008, 06:22 PM
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#3
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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why are you running 20W/50?
Rich |
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| Rand |
May 19 2008, 06:27 PM
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#4
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
QUOTE(r_towle @ May 19 2008, 05:22 PM)  why are you running 20W/50? Why not? That's pretty common in TIVs, right? I know a lot of people run it, myself included. Not being argumentative, just curious. (IMG:style_emoticons/default/beer.gif) |
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| r_towle |
May 19 2008, 06:31 PM
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#5
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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its a bit thick...my car would never start in the winter...lol
Rich |
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| Rand |
May 19 2008, 06:33 PM
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#6
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
I thought multi-viscosity oil was supposed to lean toward the thinner number when cold?
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| Jake Raby |
May 19 2008, 06:34 PM
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#7
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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 |
You really need to verify the oil pressure readings with a mechanical gauge. The DD gauges use VDO senders and they have been giving mis-readings as of lately.
If you do indeed have low oil pressure with the mechanical gauge the issue must be internal clearance related. |
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| toon1 |
May 19 2008, 08:11 PM
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#8
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(r_towle @ May 19 2008, 05:22 PM) why are you running 20W/50? Rich QUOTE(Jake Raby @ May 19 2008, 05:34 PM) You really need to verify the oil pressure readings with a mechanical gauge. The DD gauges use VDO senders and they have been giving mis-readings as of lately. If you do indeed have low oil pressure with the mechanical gauge the issue must be internal clearance related. I'm in Cali, Also, 20/50 is what Jake recomends. Jake, how are the DD gauges giving a false readings? I will give a mech. gauge a try.It will be tough to install but if it's going to verify weather another tear down is needed it's worth a shot. |
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| Crazyhippy |
May 19 2008, 08:11 PM
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#9
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Insert witty comment here... Group: Members Posts: 1,659 Joined: 28-July 05 From: Home of the Coyotes, AZ Member No.: 4,493 Region Association: None |
Overfilled and aeration?
agreed check w/ another guage... 0PSI makes nice motors into expensive paperweights. |
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| Jake Raby |
May 19 2008, 08:22 PM
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#10
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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 |
Its not the gauges, its the VDO senders they use that are BS made in China crap!
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| toon1 |
May 19 2008, 10:35 PM
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#11
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(Jake Raby @ May 19 2008, 07:22 PM) Its not the gauges, its the VDO senders they use that are BS made in China crap! Is there a better sender or gauge to use? |
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