Question about 1990 Oldsmobile Cutlass Ciera

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Oil Pressure What is considered normal oil pressure and what is the measure? The top end of my oil pressure gauge is 550 (?) and my car is at 275;

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About 275-300

Posted on Nov 27, 2008

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How can i fix the oil pump


see this tips and fix it. God bless you
The oil pump supplies oil to lubricate your engine. If the oil pump is worn or is not turning, the engine will suffer a loss of oil pressure, which may result in engine damage or engine failure.
The first sign of trouble may be a low oil pressure warning light, a drop in the normal reading on you oil pressure gauge (if your car has one), or the appearance of ticking or clattering sounds from your engine.
As a rule, most engines only need about 10 PSI of oil pressure for every 1,000 RPM of engine speed. Oil pressure will read higher than normal when a cold engine is first started because the oil is thick. Oil pressure will gradually drop as the engine warms up and the oil thins out. So normal oil pressure on a warm engine cruising down the highway is typically 30 PSI up to 45 PSI.
SYMPTOMS OF OIL PUMP TROUBLE
The first thing you should do if any of these symptoms occur is to stop your car, turn off the engine, let it sit for a few minutes, then check the oil level on the dipstick. If the oil level is at or below the ADD line, add a quart of oil to bring the level back up to the full mark. Add as much oil as is needed to raise the level to the full mark. Then restart the engine. If the warning light remains on, or the oil pressure reading does not climb back up to its normal range, or the engine noise does not go away, you may have a bad oil pump.
The other possibilities include a bad oil pressure sending unit, or a problem with the oil pressure warning light circuit or oil pressure gauge.
OIL PRESSURE SENDING UNIT
If the engine is NOT making any unusual noises and seems to be running normally, and the oil level on the dipstick is FULL, but you are still getting a low oil pressure warning light or low gauge reading, the fault could be a bad oil pressure sending unit.
The oil pressure sending unit is mounted on the engine block. On some applications, there is a spring-loaded pressure-sensitive diaphragm with a switch inside the sending unit. This switch completes the circuit to the low oil pressure warning light if oil pressure drops below a certain threshold. The unit may stop working if the diaphragm inside fails, if the switch is stuck, if the small hole that allows oil to enter the sending unit becomes plugged, if there is a loose, corroded or broken wiring connector at the sending unit, or there is a fault in the wiring circuit between the sending unit and warming light.
On vehicles that have an oil pressure gauge (electronic, not mechanical), the oil pressure sending unit has a small rheostat inside that sends a variable voltage signal to the oil pressure gauge when the diaphragm moves. A worn spot on the rheostat or any of the other problems just described for the simple pressure-type oil pressure switches can cause a problem.
FORD'S FAKE OIL PRESSURE GAUGE
On many Ford vehicles that were built from 1980 through the 1990s, the oil pressure sending unit has two switches, a low pressure and a high pressure. These vehicles also have an oil pressure gauge, but the reading on the gauge is not a true indication of real oil pressure. As long as the pressure to the sending unit is between high and low, the gauge will read normal. If oil pressure drops and trips the low pressure switch, the dash gauge will now read low. Or, if oil pressure goes up and trips the high switch inside the sending unit, the dash gauge will read high. Consequently, don't rely on the oil pressure gauge for an accurate reading in these vehicles. It is only a gross indication if the oil pressure is low, normal or high.
OIL GAUGE PROBLEMS
If the engine is NOT making any unusual noises and seems to be running normally, the oil level on the dipstick is FULL, and you have replaced the oil pressure sending unit but are still getting a low oil pressure reading on the dash gauge, the fault could be in the wiring circuit between the sending unit and gauge, or the gauge itself might be bad.
Check the wiring connections on both ends as well as wiring continuity between the sending unit and gauge. If no wiring faults are found, hook up a pressure gauge directly to the oil pressure port on the engine and check oil pressure with the engine running. If the engine-mounted gauge shows normal oil pressure but the dash gauge is reading low, the problem is a bad dash gauge.
On the other hand, if the engine-mounted pressure gauge reads low and you have done all of the above, chances are the oil pump is worn, or it is not picking up enough oil because of a restriction or blockage in the pickup screen in the bottom of the crankcase.
OIL PUMP PICKUP PROBLEMS
The pickup tube has a screen on the end to prevent large chunks of anything bad that ends up in the crankcase from being sucked into the pump. But we are talking BIG chunks of debris, not normal wear particles or carbon or dust or other microscopic-sized abrasive particles that can cause pump wear over time.

Sep 28, 2012 | 1996 Toyota Tercel

1 Answer

Oil pressure gauge


I just recently had the same problem with my 06 Tahoe .. I replaced the oil sending
unit and fixed the problem.

Jan 29, 2012 | 2006 Chevrolet Tahoe

2 Answers

I have a 2006 chevy silverado 5.3L..When in idle oil pressure gauge goes to 80 and when i accelerate ail pressure goes to zero ...is it the oil sending unit?


It could be the sending unit. If the truck is low on oil it will cause something similar. Be sure the oil level is topped up. The only way to be sure it so measure the actual oil pressure at the engine with a proper gauge..

May 07, 2011 | 2006 Chevrolet Silverado 1500 2WD

2 Answers

LOW OIL PRESSURE


to determine why your vehcle is showing low oil pressure,u need to first make sure oil filter is clean and not clogged
use correct viscocity oil
test oil pressure sending unit
test oil prssure gauge in dash
if all this checks out,then the oil pump needs replacing

Dec 16, 2010 | 2002 Ford Explorer

2 Answers

Dodge 2.7 I'm losing oil pressure after car warms up. When starting pressure is reading on manual gauge 60 PSI. Once it warms up it drops to Zero. New oil pump, oil pan and pickup tube clean. Any...


The first stop is to measure the pressure with an external gauge. if the readings are the same, surgery is needed, I would look at the oil pressure relief valve for foreign particles.

It takes resistance to make pressure, and your decsription does not sound good. If the pressure is actually dropping, and you find no issues with the oil pump and pick up, you need to measure bearing clearances... Essentially, everywhere oil is pumped needs to be inspected...

Oct 31, 2010 | Dodge Intrepid Cars & Trucks

1 Answer

04 corolla. Oil light comes on. Full of oil.


the oil pump on any car is rarely the cause of low oil pressure. if you remove the oil pressure sending unit and install an oil pressure gauge,even the type you can buy as an add on,and the reading you get is low.the problem is genrally worn out main crankshaft bearings.to avoid unneseary replacement of these,you should buy some plasti-gauge from an auto part store remove the bearing caps one at a time and measure the clearance this way.there is a risk here because the smallest grain off dirt that getts into the bearing, crankshft will ruin the bearing when you restart it.if these are worn out you probabably shoul consider replacing the engine because the other bearings are probably also worn out by this time.

Feb 15, 2010 | 2004 Toyota Corolla

1 Answer

Oil pressure went slightly higher than 275 kpa


hi! there,well actually oil pressure that you get in your gauge seems to be that you need to change oil it was below to the standard oil pressure of engine,approximately 275 kpa is 39 psig
w/c is below to 90 psig,the important here is you to avoid/prevent knocking your engine and besides this very significant of sensoring
engine activities to prevent mor costly maintenace in your car.so sent your car to service car center to change oil specially also to change your oil filter.thank/s

Mar 13, 2009 | 2006 Chevrolet Trailblazer

1 Answer

Oil Pressure Problem?


just fixed that problem myself. it was an oil pressure sending unit. twelve dollar part. and i was thinking oil pump or something... 12 dollar part. oil pressure sending unit.

Sep 18, 2008 | 1989 Chevrolet S-10 Blazer

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