low oil pressure

[321countryboy]

so i had recently bought a 88 k1500 an i had installed a oil pressure gauge. it had low oil pressure around 10-15 or so. So i dropped the oil pan an replaced the oil screen an oil pump then i started it an it had higher oil pressure at about 40. Until i reved it then it droped back down to about 10 an now thats where it stays at unless i rev it then it will shoot up to bout 20 an when i turn the wheel it almost sounds like my truck wants to die an my oil pressure drops. anyone know what the problem may be thanks.

 

[321countryboy]

bump

 

[321countryboy]

Bump

 

[4xcrazy]

How many miles on the engine?

Try a thicker oil? Sounds like a high mileage, wore out engine.

 

[nsxxtreme]

Bad oil pump?

 

[321countryboy]

I just replaced the oil pump an oil screen cuz I thought maybe that was the problem. An the motor is a rebuilt crate motor an the guy I got it from said it only had a few thousand on it.

 

[TheBeast_88K5]

Considering the Oil system is a controlled leak,
I'm thinking the pressure has escaped, elsewhere....

Maybe yer galleries not sending flow, due to blockage?
was yer oil nasty?

I'm almost positive it's a blockage.
Maybe the 'rebuilder' didn't line the bearing holes up properly.

 

[321countryboy]

there might be a blockage some where. because when i first got it there was water in the oil when i did a oil change an i was thinking maybe a blown head gasket. but the truck still ran an had no problems starting. so i went under an all the bolts on oil pan were loose so thats when i decided to go under an take the oil pan an pump an stuff out an replace it. but i just found out i need a new crank so that may have been my problem i might just buy a whole new engine or rebuild the one i got now.

 

[Deuling]

Take a pry bar to the harmonic balancer and the block. If it moves out more than a thousandth or 2 than your ("throwout"?) bearing is bad. Rebuild time or new motor. Edit: didnt read that last post... Figured it was crank though. If you have to rev it up to get pressure with a new pump, its worn out.

 

[321countryboy]

alright thanks guys

 

[dhcomp]

when i turn the wheel it almost sounds like my truck wants to die an my oil pressure drops. anyone know what the problem may be thanks.

Also, check your power steering fluid condition / level.

It will definitely put a load on the motor, and my cause the idle to drop enough that the pressure drops?

 

[321countryboy]

i checked the power sterring fluid its pretty good i think i just need buy a crank for it an replace that an it will prolly be good

 

[TheBeast_88K5]

Take a pry bar to the harmonic balancer and the block. If it moves out more than a thousandth or 2 than your ("throwout"?) bearing is bad. Rebuild time or new motor. Edit: didnt read that last post... Figured it was crank though. If you have to rev it up to get pressure with a new pump, its worn out.

"endplay"..... You're thinking 'crank runout', which is different.

Oh, oops... You meant 'thrust bearing', which controls crank endplay.

 

[Deuling]

Yes thrust is it. Thats what the " and ? Were for lol. Thanks uti man!

 

[TheBeast_88K5]

Yes thrust is it. Thats what the " and ? Were for lol. Thanks uti man!

I'm a complete dork, when it comes to this stuff!