Low oil pressure, other than a vehicle not having enough oil. What causes low oil pressure?

Question

I have been traveling a lot lately and I think my truck is burning oil. It's a older vehicle 1993 toyota sr5. It had a new engine put in it over 3 yrs. ago. 40,000 miles. Any suggestions on how to check and fix this problem

Answer 1

i own a repair shop,and you need to take it by a good mechanic shop some day and see if they have time to check it,with the engine being that new on it,and that few of miles on it,there may be a leak in it or something,any engine with just that many miles on it shouldn't use oil ,unless you see a lot of smoke coming from it, id have it checked,it might be a simple fix on it, but i would have it looked at as soon as i got a chance to,good luck i hope this helps.

Answer 2

A worn out oil pump can cause low oil pressure, as can wear to the crankshaft or camshaft bearings as they are oiled. Take the pan down, check the pump assembly for wear marks, inject shop air into the oil feed to the bearings and listen for leaking.

Typical spec is 10psi per 1000 rpm's

Answer 3

Get an oil pressure tester from autozone screw it in where the oil sending unit is located.Check the oil pressure specs on your vehicle and see if the vehicle does not just have a bad sending unit.

Answer 4

Are you using the right oil ? may be too thin ?
low oil pressure can be caused by a worn out crankshaft bearing

Answer 5

you may need a new pump also check your oil regularly if you have low oil this can effect your pressure also change it if it is being used alot chances are you aren't getting the oil changed regularly after 3,000 miles it is recommended to be changed

Answer 6

a leak, from a seal or gasket. Or a dying oil pump.

Answer 7

bad sending unit,not reading accurately.oil pump,a bad bearing will cause low pressure.

Answer 8

worn main bearings, worn oil pump does it rattle if not may be a sensor