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During prolong drives oil pressure lights gauges seem to be at the right readings but i know this is a big issue where should i start radiator flush oilo pan clean oil pump etc etc

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VW group strongly recommend using an oil flush/additive before you drain the oil EVERYTIME you change oil/filter.(keeps the oilways clean,allegedly)other than this simple task just enjoy.(till something goes wrong)these cars are bomb proof.

Posted on Oct 04, 2010

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2 Answers

2008 Trailblazer oil pressure guage at zero but driving fine?


Replace the oil sending unit. On top of the engine, in the center by the fire wall.

Apr 19, 2015 | 2008 Chevrolet Trailblazer

2 Answers

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

2 Answers

My oil pressure gauge (on the top right of the dashboard) randomly shows the oil pressure going down to zero (check gauge light comes on) and then randomly goes back into the normal range. It happens...


Did you compare what your dash gauge read when it was acting up and compare it to the manual gauge at the same time? I know you said you used the manual gauge and it read fine so if you get a proper reading out of the manual gauge and an improper reading out of the dash gauge then your dash gauge needs addressed.

Mar 20, 2011 | 2002 Jeep Grand Cherokee

2 Answers

Hello, I have the same issue like bjmadm1234 posted. The solution suggested unfortunately does not work for my car (Dodge Grand Caravan 1997). We already exchanged the Oil pressure switch, after driving a...


I would suspect that you have a weak or failing oil pump, however before condemning the pump I would do a physical oil pressure check with a gauge. Oil pumps are not easy to replace so lets make sure it is the problem before replacing it. For reference yours can be done with the motor in the vehicle.

Physical Pressure Test:

This may require you to tuck a oil pressure gauge under the driver side wiper arm and go for a short drive to make the situation replicate. Depending on how you hook up the gauge (in place of oil pressure switch) the light will be on full time during the testing and this is ok. If you can replicate this symptom that you are reporting in the drive way in gear it is desirable as you can better read the gauge.

The oil pressure should be:

3.0L = Oil pressure should be 6 PSI at idle and 35-75 psi at 3,000 rpm with engine at normal operating temperature.

3.3L = Oil pressure should be 5 psi at idle and 30-80 psi at 3,000 rpm with engine at normal operating temperature.

You see that there is a large "in spec" region for the 3,000 rpm range as listed. I would look for the pressure to be at the higher end of the scale and the idle pressure to be right in spec. If any of these pressures are low I would suggest changing the oil pump.

If your motor is one that I have not listed here please comment back and I will provide the appropriate spec per the motor in your van.

Feb 09, 2010 | 1997 Dodge Caravan

2 Answers

Possible oil pump problem


You need to determine if the engine has lost oil pressure (assuming the oil level is good) You need to place a mechanical gauge where the oil sending unit is that goes to your gauge. If this gauge reads low, you have an oil pump problem. Keep in mind that gauges and sending units can go bad. But the loosing power doesn't sound good. Start here to determine what is up.

Aug 20, 2009 | 1995 Chevrolet Camaro

1 Answer

Oil pressure high


could be oil pressure switch in eng block ??engine light on? if so scan it for fault codes retreve and start looking for dealer explanation perhaps

Jan 03, 2009 | 2004 GMC Yukon

1 Answer

Check oil and check gauges light on


HEY,
YOU SEEM TO BE ON THE RIGHT TRACK. I WOULD START WITH THE SENDING UNITS. GM LOVES TO PUT TWO OF THE ON A CAR. ONE FOR THE GUAGE AND ONE FOR THE DASH LIGHT. UNLESS YOU HAVE NOTICED ANY BIG CHANGES IN OIL PRESSURE I WOULD THINK IT IS THE SENDER(SWITCH) FOR THE LIGHT. THEY ARE NORMALLY LOCATED AROUND THE AREA OF THE OIL FILTER HOUSING.

Dec 05, 2008 | 1992 Oldsmobile Achieva

2 Answers

2001 Trooper turbodiesel oil pressure gauge


check oil pressure with test gauge from near large engine oil filter and cooler assembly, to rule out sender unit issue, if same readings check oil pick up sucking air O ring leaking?
releif valves in oil filter cooler assembly, stuck/jamming open?
if vehicle has been sitting for a couple of days and this happens light should only stay on 1-2 seconds go out and then gauge starts reading
have seen this on older higher km vehicles bad ones have balance shaft centre journal in sump worn out (new sump)

Sep 18, 2008 | 2001 Isuzu Trooper

2 Answers

Dash Temp Gauge reading extremely hot


You need to pressure test the cooling system. If it holds pressure, I would look at replacing the water temp. sensor. If it doesn't hold pressure, you have a coolant leak going on. If you don't see it dripping on the ground or inside the car, I would be suspecting head gasket problem.

Jun 09, 2008 | 1995 Ford Taurus

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