[weitz]

I have a question about the oil pressure on my truck. When I first start the truck it will go to the middle 40 mark on the gauge. Once I drive the truck and get it warm it will drop down just above the first white hash mark on gauge(between 0 and 40) when stopped at idle. then once on the throttle and up to speed it will go back up to the 40 mark. I was wondering if this is common or if it is something to look into. thanks

 

[cow_killer_cummins]

That is a little low, should be around 35 or so warm at idle, and between 65 and 80 while driving, Mine never gets below 35 and it has 225k on the clock, try a fresh oil change and 1 quart of lucas in with the other oil. Should help a lot, good luck.

 

[weitz]

I was somewhat concerned, I've heard low oil pressure could be because of worn out bearings in the motor

 

[cow_killer_cummins]

Could be caused by any number of things, i would start with the basics and work your way to the problem.

 

[rich_k_h]

Could be caused by any number of things, i would start with the basics and work your way to the problem.

i agree!! start simple. its cheaper that way!!

 

[blu_by_u]

First things first....what year of 24valve engine do you have? And are you using the 12 valve sensors to run your dash? If you have a 2002 engine and you're using the 24 valve sensors and computer for the dash (updated dash???), then you have an oil pressure switch and the "gauge" is just a fancy dummy light. The ECM (computer) uses engine speed and coolant temperature to decide what the oil pressure probably is and sends a signal to the dash to show what it probably is.

Either way, hope you're oil pressure is good.

 

[runit02]

I was somewhat concerned, I've heard low oil pressure could be because of worn out bearings in the motor

Go down to the auto parts store and buy a $20 gauge, it will have the fittings to tap into the top of the oil filter housing. The oil pumps are mechanical and usually take something pretty drastic to fail. Smell your oil, is it full of fuel?

 

[1BadOilBurnerN-Lv]

my 98 24v shows 65 and up all the time .....idle is 65 then climbs as the rpms do
:shock:

 

[crackerjack1980]

mine is never really accurate but it shows to make sure I acutally have some oil pressure. I periodically check it with a pressure sensor for my snap-on modis. I tried 2 brand new sensors once and they both gave slighly different readings right out of the box.

 

[silverram323]

Factory service manual says 8.5 to 109.5 is normal range. Your numbers match mine.
I have also heard this rule of thumb. 10 psi per 1000 rpm.

 

[silvertungdemon]

80-100psi cold and 60-80 psi warm with a new oil pump and my old one was 35-50 warm and 60-80 psi cold

 

[crackerjack1980]

little off topic, but quick question, can you pull the pan off in the truck in a 2wd application? an inframe would be cool.

 

[runit02]

little off topic, but quick question, can you pull the pan off in the truck in a 2wd application? an inframe would be cool.

Ive looked and the clearance seems similar to the 4x4. I have a writeup on it if you want pics :thumbsup: