Question about 1983 Isuzu Pickup

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Low oil pressure when engine is hot.

What is the main problem when there is a low oil pressure when the engine is hot?

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  • Anonymous Mar 12, 2014

    when car whroms up lose oil pressure

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Oil pump starting to fail

Posted on Jul 07, 2008

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iambanshee74
  • 3489 Answers

SOURCE: intermittent low oil pressure light going on. oil

I am assuming that the last people to change the oil were probably not the dealer?! If this is true, replace the filter with a AC Delco filter. There IS a difference in filters, pressures and design. If the level is good (?), this should really take care of the issue. Many manufacturers have addressed this issue in dealer TSBs and recognized that the aftermarket quick lube places have failed in quality as well as many aftermarket filter manufacturers.

Posted on Nov 01, 2010

  • 534 Answers

SOURCE: 1984 New Yorker 2.2 Turbo oil pressure low on ilde

Replace the low oil pressure indicator sender switch.
If you still get a low oil alarm at idle, there is some other engine problem causing it.
Get the oil pressure checked with an independant gauge before proceeding further.

Posted on Sep 05, 2009

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1 Answer

Willthe bluebird sss oil pump fail after 20 years


It certainly could.
Also, at that age, the bearings and clearances could be getting slack so oil pressure would be expected to get lower.
If oil pressure is high when engine is cold, and low at idle when engine is hot, and high at higher RPM with hot engine, then it's more likely engine wear than bad oil pump.
Low oil pressure at high rpm with hot engine indicates failed oil pump. Best not to run when you have this condition.

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Where is the oil pump situated on a CateraS 2001.Have low oil pressure when idling or at a red light.


Hi Rejean, I suggest you have the oil pressure sender unit inspected before thinking of replacing the oil pump. If it's the sender unit the job will be a fraction of the cost of an oil pump replacement, which means opening the engine. Regards John

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1996 Chevy c1500 low oil pressure when hot at idle


Pressure regulator in the oil pump is bad or there is significant main bearing wear

Oct 09, 2011 | 1996 Chevrolet C1500

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Low oil light comes on , is it low oil pressure or low oil level


it is a combanation of both low oil level =low oil pressure check your oil level and make sure it is on the full mark and drive it to see how pressure is it could also be the oil pressure sending unit good luck

Dec 26, 2010 | 2002 Chevrolet Malibu

1 Answer

How do I check and possibly replace the engine oil pressure sensor in a 2006 GMC Envoy Denali?


Oil Pressure Test Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge. A tachometer may also be needed, as some specifications may require running the engine at a specific RPM.
  1. While the engine is cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Note and record the oil pressure reading when the engine is cold. The engine may need to run at a specified RPM, if so check the vehicle's specification.
  5. Run the engine until normal operating temperature is reached.
  6. Check the oil pressure reading again with the engine hot and record the value. Turn off the engine.
Compare the hot oil pressure reading to the specification. If the reading is low, check the cold pressure reading against the specification. If the cold pressure is well above the specification, and the hot reading was lower than the specification, the engine may have the wrong viscosity oil. Change the oil, making sure to use the proper grade and quantity, and then repeat the test.
Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

Oct 09, 2010 | 2006 GMC Envoy Denali

1 Answer

Where is the oil pressure sensor located on a 1996 murcury cougar


Look for the oil pressure sending unit on the block or the cylinder head on the V-6 or V-8 models. --- OIL PRESSURE TEST Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge (as opposed to relying on a factory installed dash-mounted gauge). A tachometer may also be needed, as some specifications may require running the engine at a specific rpm.
  1. With the engine cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Check the oil pressure reading when cold and record the number. You may need to run the engine at a specified rpm, so check the specifications.
  5. Run the engine until normal operating temperature is reached (upper radiator hose will feel warm).
  6. Check the oil pressure reading again with the engine hot and record the number. Turn the engine OFF.
  7. Compare your hot oil pressure reading to specification. If the reading is low, check the cold pressure reading against the chart. If the cold pressure is well above the specification, and the hot reading was lower than the specification, you may have the wrong viscosity oil in the engine. Change the oil, making sure to use the proper grade and quantity, then repeat the test. Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

Sep 09, 2010 | 1996 Mercury Cougar XR7

2 Answers

How do you know there is a problem with the oil pump?


The oil pressure light or gauge will show that it has low oil pressure and you shouldn't run the engine that way.

Jul 12, 2010 | 2004 Suzuki Forenza

1 Answer

I get knocking when engine gets hot stopped (on D,1,2,3 or R). There is no check engine light, it is not LOW ON OIL, I have installed a new idler pully, put a new power steering pump on, spark plugs, fan...


Sounds like it could be low on oil PRESSURE. Or possibly bad bottom end (main bearings). A lot of times when the clearences are excessive in the main bearings, oil pressure will drop considerably once the oil is hot and has a lower viscosity. Sorry about the caps, just wanted to clarify the difference.

Mar 14, 2010 | 2003 Chevrolet TrailBlazer

2 Answers

Low oil presure when hot in my k1500


if the engine has high mileage the lack of oil pressure could be worn main bearings.but if your lucky it could be a faulty oil pressure sending unit.fyi there are 2 sensors one is desingned to tell the ecm low pressure to shut off the fuel pump to prevent engine damage this would explain ur jerking

Mar 27, 2009 | 1993 Chevrolet K1500

1 Answer

Fluctuating oil pressure on 92 Mercedes 300CE


Either the sending unit,(this unit is on the motor)is malfunctioning, or your engine oil pump may not be providing enough pressure.
This could be due to sticky oil pressure bypass valve,,worn out pump,,or worn engine main bearings.
If it is just a case of worn engine oil bearings,this is usually indicated by high oil pressure when cold,,but low oil pressure when hot,.i wouldn't worry to much, since most engines suffer from this same complaint and doesn't harm the engine any.

Jan 19, 2009 | 1992 Mercedes-Benz Mercedes Benz 300 Class

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