Low Oil Pressure

[BlakEclipse]

Ok i change my oil today and now when i start the car the oil pressure will be fine until i drive around for a while then the pressure will become low. What is causing this??

 

[AgntorangeDSM]

oh man, this happened to me and some times at idle the light will come on the needle barely lifts off the zero line not sure whats going on just know that the light doesn't come on while driving. this is just after i got my motor back in after over hauling it and then the tranny went out so it sat for a day or two then i drove it down to the shop to put the new one in and now low press. and idiot light on.

 

[silver bullit]

Did you replace the oil pump on the rebuild or not? It is ethier a sensor or oil pump is going and needs replaced before it destroys ## motor.

 

[luvmygst]

What weight oil did you put in the car? Is it the same as you have been running? If you went to a thinner oil that would account for the pressure drop when hot. Do you actually have a number or are you just going by the factory gauge?

 

[AgntorangeDSM]

yes the oil pump was replaced after the low oil happened and still the same out put low oil and dummy light on, i'm going by factory gauge , and i'm running 10W 30 royal purple with i quart lucas oil stabilizer. also the sensor for the light has been replaced on mine and so has the big sending unit piece on the far back side with one wire lead off of it.

 

[BlakEclipse]

Well i am running the same oil 10w30 and im going by the factory gauge. THe thing is is that the oil pressue is good until it runs about ten min then goes down.

 

[AgntorangeDSM]

^^yours sounds like it gets warm and thins out.

 

[hopwoodp]

Well i am running the same oil 10w30 and im going by the factory gauge. THe thing is is that the oil pressue is good until it runs about ten min then goes down.

Try to get an aftermarket oil pressure gauge. You want to read 5 psi at idle, you don't want to go any lower than that. My stock oil pressure gauge started to crap out and no longer reads at all. I installed a mechanical oil pressure gauge and it works fine.

 

[Defiant]

First suspect is a tired pressure sender.

 

[AgntorangeDSM]

and the sender is the the back one with thats about 2" in diameter and has a single wire lead cause i replace the front one the triggers the idiot light

 

[hybridb18]

personally i think its the sensor, but you should get a gauge of some kind thats accurate. If not try and run some thicker oil. ive always run 10w40 on a turbo car

 

[AgntorangeDSM]

gees 10w40!! how that work for you in Ohio?? we get below zero 3/4 of our winter and thats to thick for me yea i'm working on a secondary gauge to reference to.

 

[AgntorangeDSM]

it must have been the oil because i change it to 10w 40 and the pressure is right where is supposed to be. thanks guys