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Why would you lose oil pressure in a V8 motor after it warms up?
Wiki User
∙ 15y ago
Because all engine parts expand with heat which increases the oil clearances. If it is an higher mileage motor add a can of STP with every oil change; that will help. Oil thins when it is heated. Thick oil takes more to push through the engine than thin oil. Your Main Bearings are shot. I wouldn't go so far as to say the bearings are shot. Depends on how much oil pressure drop we are talking about here. Droping to zero means there is a problem. But if it drops to 20 - 30psi then that is normal.
Wiki User
∙ 15y ago
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Why does my 1988 chev. 350 motor lose power after it warms up?
check the O2 sensor
Would the losses decrease if a fan is mounted on the motor shaft?
no the lose will increase but motor would not heat up and its wiring will be safe this lose will decrease
What would cause the fuel system in your 1990 3.1 cavalier to lose pressure when NOT running?
it has a machanical fuel pump mounted on the engine. so there would be no pressure as you turn the ignition on, but would only get pressure once the engine has turned a few times, by the starter motor, in order to create fuel pressure. but check your fuel lines, usually they would be your problem
What kind of head pressure would you experience if the condenser motor became inoperative?
The compressor would continue to operate until the high pressure safety switch shut it down, if the switch failed the pressure relief device would blow and you would lose all of the refrigerant. As far as how high would the pressure get, the settings on the two devices depend on what type of refrigerant is used and you do not mention that.
What to do when there is a complete loss of oil pressure while driving?
Pull over and kill the motor immediately when you lose oil pressure, failure to do so will destroy the engine.
What kind of head pressure would you experience if the condenser fan motor became inoperative?
The compressor would continue to operate until the high pressure safety switch shut it down, if the switch failed the pressure relief device would blow and you would lose all of the refrigerant. As far as how high would the pressure get, the settings on the two devices depend on what type of refrigerant is used and you do not mention that.
Can you lose oil from a bad oil pressure?
That would not account for loss.
Why would a 475hp cat motor lose oil pressure?
There are three things that cause loss of oil pressure: worn-out oil pump, worn-out springs on the pressure control valves, and worn bearings. (Listed in order of expense to fix. Worn bearings means you've got to do an in-frame overhaul on your engine.)
What would cause a Chevy 350 engine to have oil pressure when cold and lose oil pressure when at running temp?
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.
What would cause your 1991 Isuzu trooper to lose power and then stall after it warms up then it won't start again until it cools down about 10 to 15 min?
ECM
What would make a cavalier lose power and not run right?
Low fuel pressure
Do blood pressure medicine help you lose weight?
they might allow you to live a healthier lifestyle that in urn would help you to lose weight
