I would start by replacing the oil pressure sending unit. If that does not correct the problem, I would look closely at the gage itself. If you hear any valve train noise at cold startup, you need to have an oil pressure test run to make sure you actually have good oil pressure when starting the engine cold. Possibly the gage is correct and you do have 0 oil pressure when cold.
From the moment you turn on the vehicle, it changes in two ways: 1. When it is cold and the oil is cold and thicker, it needs more pressure to pump the oil through the engine. You will notice a change in the oil pressure at idle when it is cold and at idle after the engine has had a chance to warm up. 2. The higher RPM the engine has to operate in (such as going through speeds 1, 2, 3, OD, or flooring it to pass someone), the more lubrication the engine will need and thus the higher the oil pressure. As soon as the engine slows down, so the oil pressure lowers.
the engine gets hot and while your engine is running your oil is going through your engine lubbing it. by the time the engine gets hot the oil is spread throughout the engine. if you have too much oil in the gauge will act weird because its hooked up to your oil to read its pressure. if it was youroil pump or switch it would do this when the engine was cold to. make sure the oil is at the correct level b4 spending money on a switch or pummp
Cold oil when you first start the engine will have lots of pressure then it will settle down as the oil warms and thins out.
The oil pressure sender or pressure sensor is located on the side of the engine next to the fire wall.if you are facing that side it would be to the upper left of the starter.i believe you want to use a 23 mm semi deep socket and do it when engine is cold!
When the engine is cold, all the parts are tight. Meaning, the bearings, rods, and all have less gap. The oil is also thick. As the engine warms, the oil also warms making it lighter or more fluid. If the main bearings have too much gap, then with the warmer oil the oil flow will increase which in turn will lower the oil pressure. It would not be abnormal to start out with 50 or 60 lbs then have it reduced to 20 lbs at idle. Although the pressure would increase to around the 50 lbs. mark as the engine rev's up. If the oil pressure goes down to say 10 lbs, even at high rev's, then have the pressure checked with a mechanical gauge to confirm the reading and if so, well, time for a rebuild. Low oil pressure will not reach the outer parts of the engine and will eventually cause a lot of damage.
Oil pressure gauges are notoriously inacurate. Pressure should be high when the engine is cold, or the accelerator is pressed hard. It's also possible the sensor is damaged.
No, if the oil pump drive is working cold it will work hot. Low oil press when warm is due to internal engine wear.
low oil pressure is caused by, either low oil in engine or a bad oil pump
I thought I had high oil pressure, When I would rev the engine the oil pressure would max out on the oil pressure guage. Luckily it just turned out to be loose connections to the oil pressure sensor. I tightened the terminals and the problem went away.
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.
No. The harmonic balancer does exactly what it says. It is to keep the engine from viberating. You need to install a manual oil pressure gauge and run the engine cold and hot to determine if you really have a pressure problem. Most likely you have a bad oil pressure sending unit.
It means that the oil pressure switch is showing low pressure.
Most cars would not have any oil pressure until after the engine starts turning because the oil pump is driven mechanically off of the engine.
You need to have an oil pressure test run to determine if the oil pump is bad or the sending unit is defective. It could also just be a bad seal, or something to that effect. Check your oil fill cap and see if it is staying tight. It would make sense for the oil pressure to be higher at first when the engine is cold, because the oil would be thicker. Once it gets warmed up and thinner, the pressure should go down some, but not to zero.
If it is high enough to be splashed by the crankshaft it would foam up. That would cause a lack of oil pressure and engine damage.
The oil pressure is created by the oil pump which is mechanicly driven inside the engine. When oil is cold it is thicker so oil pressure is higher, as it warms it thins and lowers the pressure slightly. When you rev the engine up the oil pump pumps faster, therefore raising the pressure in accordance with the rpm. Those readings sound fine to me. Hope this helps
Oil PRESSURE is an indication of the condition of the engine's bearings. If the oil pressure is low, the engine is about ready to quit.
oil pressure switch oil pressure low worn engine did you drive with no oil in for a long time are there any noises in the engine
Especially if you are in cold areas, it takes more pressure to circulate cold oil. When it warms up, the oil flows easier through the system reducing pressure.
Engine seal? Valve cover? Oil pressure sending unit?
Yes. However, the oil pressure switch may be accurate, in which case you have low oil pressure in the engine which can be caused by a faulty oil pump or clogged oil pump screen. Low oil pressure can cause serious damage to the engine. The oil pressure switch is shutting the engine down to prevent any damage. The best thing to do is take the car to a mechanic.
Measures the engine oil pressure and sends this information to the oil pressure gauge.
Anything above 5 psi at idle will lubricate your engine. There is no maxim oil pressure for a 2003 Chevy Trailblazer. When the engine is cold and the oil is thick you should see 60 to 80 psi.
Low oil pressure due to excessive engine wear (bearings) Defective oil pressure sending unit? Try a manual gauge to determine actual engine oil pressure Try a heavier engine oil i.e. 20W-50