Best Answer

A bad oil pump will casue no oil pressure and/or a bad oil filter Answer #2: If the oil pressure is up when the engine is cold but drops after the engine warms a bit, the bearings are worn and the oil pump is not engineered to pump enough volume to keep the pressure up once the bearing tolerances get that worn. Try using a heavier grade oil. If you have been using a 5 W 15 oil, go to a 10 W 30. If you've been using 10 W 30 try a 15 W 40. If that doesn't work try an oil thickener. You might be able to squeeze a little more service out of a failing engine if you have a thicker weight oil. If the oil pressure is up when the oil is cool, it's not the oil pump. pressure sending unit

User Avatar

Wiki User

โˆ™ 2006-03-31 19:12:52
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What causes an oil pressure reading of nearly zero after engine warms up Chevy 350 doesnt leak or burn oil?
Write your answer...
Related questions

What is the reading of oil pressure gauge before engine starts?

Oil pressure shouldn't register at all until the engine starts and builds up pressure.

What causes air flow into an engine?

Atmospheric pressure

What causes engine oil pressure gauge to act erratically on 98 ford explorer?

Assuming that the engine oil is at a constant pressure, look at the oil sending unit. A bad sending unit or loose wire connected to it can cause an erratic oil reading.

What causes inaccurate readings in electronic oil pressure gauge on a diesel engine?

Most likely the problem is with the Pressure Sensor in the engine block.

Purpose of an oil pressure sensor?

The oil pressure sensor sends a reading to the gauge so you can moniter the engine's oil pressure. No oil pressure means the engine is in big trouble.

What would be an average compression test reading for a 350?

The average compression test reading for a Chevy 350 small block engine is around 150 PSI. Lower pressure indicates that there is a leak in the engine.

What causes oil pressure drop when engine has heated up during drive?

The oil gets thinner. It is normal for the oil pressure to drop after the engine has reached full operating temperature. If you have from 30-40 psi pressure when the engine is hot then that is normal.

Does a 2000 dodge caravan have a oil pressure circuit protection?

If you are asking if the engine will shut off when the sensor does not detect oil pressure, the answer is no. It will run without an oil pressure reading.

What happens to the efficiency of car engine if the muffler is removed?

Any engine needs back pressure to run efficiently. That is what the mufflers do, they create back pressure. So, by removing the muffler(s), you have stopped the back pressure, which in turn causes the engine not to run efficiently.

What causes a engine knocking noise when you are accelerating and the engine is warm doesnt do it when engine is cold?

Most likely needs a tuneup done. Check the timing and change the normal tuneup part.

What makes Oil pressure drops when ac goes on?

the ac slows the engine, the lower idle causes the lower oil pressure

What is it that makes a car engine work?

Combustion is the chemical reaction that causes a car engine to work. It is produced by fuel combining with oxygen which causes pressure and heat to turn the crankshaft of the engine. This essentially gets all of the parts of the engine moving.

What causes an engine to surge?

we have a gas engine jenbacher 1006kw.we face a black shutdown due to exhaust back pressure high.

What is it called when combustion occur in a rocket's engine and releases heat and pressure making a larger pressure gradient inside the rocket than outside which causes the gaseous products?

Thrust occurs when combustion in a rocket's engine releases heat and pressure making a larger pressure gradient inside the rocket than outside which causes the gaseous products?

What is the normal oil pressure reading for a jeep 5.2 engine?

Running at operating temperature around 40 psi.

What is the normal fuel pressure reading for a 1999 Mercury Villager?

It should be 30-35 psi with the engine running.

What causes the engine to squeal when applying the brakes?

probably not your engine, sounds like its time for new brake pads. if this doesnt correct it have the master brake cylinder checked

Why is your Oil pressure gauge fluctuating up and down indicator reading oil pressure low stop engine light on?

Do not run the engine until you have checked oil level, sounds like you are very low on oil.

What causes low oil pressure for GM's 3.8L V6 engine?

In my 1995 Pontiac Bonneville the oil leaks out the intake manifold and drips onto the exhaust. An engine that has a gaping hole will hold no pressure.

What causes engine code p0193?

P0193 Fuel Rail Pressure Sensor Circuit High Input

What causes an engine to lose oil pressure?

oil pump/ main bearings/ severe oil leaks/

What causes engine back pressure and abnormal sound?

A restricted exhaust, possibly a plugged cataylitic converter.

What causes pressure in a hydraulic system?

Hydraulic pump that produces pressure in a hydraulic system. It takes energy to pump the electric motor or engine mechanical.

What is the ideal oil pressure reading for a Buick LaSabre with a V6 engine?

There is no ideal pressure. Of course the oil pressure will be higher when the engine is cold. After it is running and at full operating temp, the pressure should read at least 10 lbs while idling. The pressure will be directly related to how many miles are on the engine and the amount of wear. A new engine will have around 40 lbs when hot and running at 2,000 rpms, and around 30 lbs at idle.

What causes high fuel consumption in a diesel engine?

There are several causes for high fuel consumption in a diesel engine. These include a difference in the weight of the vehicle, increased usage of air conditioning, and a difference in tire pressure.