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Post by kitt2000 on Sept 1, 2009 16:34:47 GMT -6
 i need to know what i need to do my oil pressure drops when sitting at red lights and stop signs. im running 10w 30 in it do i need a thicker oil like 10w 40 or 20 50. if any one has the answer please let me know thanks..........
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Post by kitt2000 on Sept 1, 2009 16:35:41 GMT -6
also it drops so low the bell goes off and the dic says low oil pressure my sending unit is new .
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Post by oldsmobile99 on Sept 1, 2009 19:14:34 GMT -6
what year is it ?
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Post by kitt2000 on Sept 1, 2009 20:25:44 GMT -6
1997
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Post by oldsmobile99 on Sept 1, 2009 20:54:49 GMT -6
i had the same problem but i think they fixed the pressure relief valve after 96.
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Post by Speed Neon on Sept 1, 2009 20:55:58 GMT -6
^ actually the better oil pump is in a 95
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Post by oldsmobile99 on Sept 1, 2009 21:03:49 GMT -6
heres how i fixed mine (thanks to glennda5id for this TSB ) i just copied this from my old post when i had this problem. it worked great for me. still runs great too (knock on wood).
There is a TSB relating to what he is talking about. It involves the oil pressure relief valve not sealing correctly and then the oil pump cannot prime. The fix is below, but basically involves putting 10 or 12 quarts of oil in the engine and revving it:
Engine - Loss of Oil Pressure/Lack of Power/Oil, MIL ON
File In Section: 6 Engine
Bulletin No.: 47-61-32B
Date: March, 1996
Subject:
Lack of Power, Loss of Oil Pressure
(Check Harmonic Balancer Bolt Torque and Flush Oil Pump Relief Valve)
Models:
1993 Cadillac Allante
1993-96 Cadillac Eldorado, Seville
1994-96 Cadillac Concours
1996 Cadillac Sedan DeVille
with 4.6L Engine (VINs Y, 9 - RPOs LD8, L37)
1995-96 Oldsmobile Aurora
with 4.0L Engine (VIN C - RPO L47)
This bulletin is being revised to add clarification to correction. Please discard Corporate Bulletin Number 47-61-32A (Section 6 - Engine).
Condition
Some owners may comment on low oil pressure which may display a "Low Oil Pressure" message and/or a "Malfunction Indicator Lamp" (Service Engine Soon) telltale. Vehicle owners may comment that these telltale messages illuminate at engine speeds of 1000 rpm and above.
Cause
Lack of oil pressure may be caused by:
^ Particles from the manufacturing process sticking the oil pump relief valve, not allowing the valve to seal to its seat which does not allow the pump to prime.
^ A loose harmonic balancer bolt which will result in the oil pump not turning.
Correction
Ensure the harmonic balancer bolt is tighten to spec. The correct torque value for this bolt is 60 N.m (44 lb ft) plus 120°for 1993-95 engines with an M18 bolt and 50 N.m (37 lb ft) plus 120°for 1996 engines with an M14 bolt.
Notice : A small number of 1995 engines were built with crankshafts equipped with the M14 bolt. Identify the size of the bolt to determine the proper torque specification.
If the bolt is to specification, the cause of the low oil pressure is internal to the pump.
To remove particles from the relief valve in the oil pump, perform the following procedure:
1. Add an ADDITIONAL 10 to 12 quarts (liters) of engine oil to the engine. This will immerse the pump completely in oil.
2. Start the engine and repeatedly open the throttle (rev the engine) from idle to 3500 rpm. This will allow the pump to prime; cycling the relief valve forces any debris from the relief valve.
Important : Do not operate the engine above 3500 rpm. Doing so will aerate the engine oil and/or force excess engine oil into the PCV system. DO NOT DRIVE THE VEHICLE while the additional oil is in the engine.
After the engine has sufficient oil pressure, any valvetrain noise associated with this low oil pressure condition should not be evident upon restarting the vehicle and the low oil pressure and malfunction indicator lamp (service engine soon) messages should not remain illuminated.
3. After engine has sufficient oil pressure, drain the crankcase. Reinstall the engine oil pan drain plug.
4. Add 7 quarts of engine oil and check the oil level. Make sure the vehicle is on a level surface and the engine operating temperature is 1OO°C when checking the oil level with the engine stopped for 15-20 seconds.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation Labor Time
J0989 0.5 hr
hope it works for you. i also put a little seafoam in to help clean it.
to:speed were there different pumps ?
-josh
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Post by kitt2000 on Sept 2, 2009 7:10:10 GMT -6
so 10 to 12 quarts total any grade
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Post by kitt2000 on Sept 2, 2009 7:11:42 GMT -6
also mines at idle not above 1000 my car a 1997
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Post by kitt2000 on Sept 2, 2009 7:17:51 GMT -6
it only does ti now and then
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Post by lynzoid on Sept 2, 2009 7:48:22 GMT -6
not total - ADDITIONAL 10-12qts !
and READ TSB THRU before attempting it...
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Post by glennda5id on Sept 2, 2009 8:18:13 GMT -6
I dont think the TSB mentioned above is your problem. You would have little or no oil pressure all the time, even when cold if you had the issue with your oil pump not being able to prime itself.
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Post by kitt2000 on Sept 2, 2009 10:33:34 GMT -6
so what do u think i need to do
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Post by oldsmobile99 on Sept 2, 2009 15:53:36 GMT -6
mine problem was only during running temp or higher 225ish and at cold was fine. tell one night it just gave out totally at cold. if i was sitting at a stoplight and i got low oil pressure i could rev about 200 more rpm than idle and message would go away till it went back to idle. is this like your problem ?
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Post by kitt2000 on Sept 3, 2009 17:54:19 GMT -6
yep the same deal
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Post by cbburtraw on Sept 8, 2009 15:58:49 GMT -6
give it a shot. worst case is you waste money on an extra oil change or two. And you wont use that oil much, so as long as your current oil is fresh, just drain it and store it for the next change.
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i need to know what i need to do my oil pressure drops when sitting at red lights and stop signs. im running 10w 30 in it do i need a thicker oil like 10w 40 or 20 50. if any one has the answer please let me know thanks..........
