Engine/Transmission (1998.5 - 2002) Help no oil pressure

[BEiselstein]

I parked the truck in mid June because the slave cylinder went out haven't had a chance to work on it til now, I put a clutch in it while it was down also, I got it all finished last night, fired it up and now no oil pressure. Installed a new filter and a mechanical gauge no pressure where do I go next. Truck is a 99 3500 4x4 5 spd

 

[petersonj]

I know this is a very basic question, but it must be asked. Is the oil level full in the crankcase? I realize that you probably have already checked.

- John

 

[BEiselstein]

Yep it's full

 

[petersonj]

When you tested for oil pressure with the mechanical gauge, did you remove the oil pressure sender and use that port or did you
connect somewhere else?

- John

 

[BEiselstein]

Connected the gauge to the port on top of the filter housing

 

[petersonj]

I am not sure what the port on top of the filter housing is used for. The oil pressure sending unit is in a difficult place to access on the driver's side of the engine near the ECM on the block. It is possible that the electrical connection to that sender may have been dislodged or damaged when you did your clutch job. I would definitely check out this area. Also, this is where you should test for oil pressure with the mechanical gauge.

If necessary, you can prove that you have oil flow by disabling the engine's ability to start by removing the fuel supply relay ( #51, I think) in the main fuse location in the engine compartment. Loosen the oil filter two or three turns and place a drain pan underneath. Have someone crank the engine for a few seconds (it should not start) while you verify that a steady supply of oil is coming from the filter area. You will probably set a check engine light, but it should reset after driving.

- John

 

[BigPapa]

Connected the gauge to the port on top of the filter housing

That port is fine. It's where I have my oil pressure sending unit.

 

[petersonj]

That port is fine. It's where I have my oil pressure sending unit.

Thanks for that clarification.

- John

 

[BLNRAY]

pressure regulator in the cooler