Im having some oil pressure issues with my truck and was wondering if anyone else has had similar issues and what they did to fix it. Its an '89 with 245k, the problem starts when its been driven hard or after my hour commute home and you shut off the engine for around 10 minutes. When you restart the engine the oil pressure light stays on for about 10-15 sec and you can hear the clatter of the engine. But, after the 10-15 sec the light goes out and the noise stops, so the pressure is back up. It is almost like the oil pump is bleeding down except if I let it sit for 30 minutes or more until it cools off then it starts with no noise or pressure light. It seems to be related to the viscosity of the oil. ( im running 10w40) Also, the engine is a bit more tappy at hot idle. I have not had time to hook up a oil pressure guage yet, but I suspect it is a little low. Has anyone else had to replace the oil pump? what is involved? thanks for any thoughts or comments.

 

I'm having a pretty similar issue with mine, only Im also loosing tons of oil.
Keeping my eye on this thread.

 

Replacing the oil pump on the 22re is easy. It sit right at the front of the engine behind the crank pulley. Remove the fan, remove the belts, remove the fan shroud if you have one, remove the bottom "rock plate", break the crank bolt loose, remove the pulley, remove the pump, replace the pump and put it back together. Should take less than two hours if all goes well.

 

Oil pumps on the 22re don't go out all that often. The biggest killer in relation to the oil pressure is the inability of the oil to flow. A plugged up oil pick-up screen and blockages in the oiling system have the biggest impact on the oil's ability to flow. I would try and run something like seafoam in the crankcase for 50 miles or so and then change the oil. It will help clean some of the stuff up. Plus, it's relatively inexpensive and can be done multiple times to try and clean out the engine..

 

never mind...

 

+1 on oil passages being blocked. Could maybe also be parts of timing chain (plastic) guides that have broken over the years and are getting in way of the pickup screen at the bottom of the pan?

I would check to see what shape your timing chain guides are in - just pop the valve cover and look on either side of the cam sprocket, just below the sprocket - you'll see if the guides are still intact...and if they are not, check out the sides of the timing cover in that area to see if the chain has been "slapping" at it and eating away a 0.5" wide pair of tracks over time (which means you need to do the timing chain/guides/cover replacement too).

 

Thanks for the replys! I wonder why the pressure is worst when oil is thin? I would think oil pressure would drop with the oil thicker when dealing with plugged screens or passages ?