Oil pressure delay?
 

My 1994 GMC Sierra with a 5.7 TBI has a new issue. I get a good 3-5 second delay getting oil pressure when I start up after sitting over night. After that, I have great pressure. Anyone seen this before? I am about a hair away from replacing the oil pump.

RE: Oil pressure delay?
 

If its not knocking during this time,I would not worry..

remember,the oil sender gets oil pressure LAST...Of course,it could be clogged as well

RE: Oil pressure delay?
 

Aye. Unfortunately it DOES knock until pressure gets built up. This is why I worry.

RE: Oil pressure delay?
 

I first missed that it was a 94....Those knocked some new...But yeah,I'd probly try a pump

RE: Oil pressure delay?
 

Also,make sure your using an A/c Delco pf1218 on that K motor.

RE: Oil pressure delay?
 

Only A/C delco oil filter?

RE: Oil pressure delay?
 

I bought it 14 months ago and only recently noticed this issue.

RE: Oil pressure delay?
 

the `1218 has a check-valve to prevent the oil from draining back over night

RE: Oil pressure delay?
 

So do the K&N oil filters.

RE: Oil pressure delay?
 

I did not realize that the other filters did not have a check valve. Thanks a million guys.