|
Originally Posted by mebob2001
(Post 632486)
go to autozone or cadian tire, rent the pressure gauge test, remove sensor and check the reading when hot, dont forget engine RPMs will give you different readings, at idle 600-800 rpms the oil pressure reading when hot should be around 20 psi, least any jimmys ive worked on(work in a gm dealership) there usally around 20 psi, the ones who ahd **** maintance are like 15 psi.... but besides that i cant see the truck just randomly droping oil pressure unless the pressure releaf valve is sticking which is possable but unlikly, dont switch toa heavier oil until you test base oil pressure when its acting up... your wasting money.
never spend money without evidence on the issue, plain and simple! |
I put a take out motor into my 98 S-10 SS from an express van (98K on it). When it runs hot running down the road it has about 30PSI. Idling in gear it's about 15PSI. I'm running 10W/30 with Lucas. I'm not happy with it myself, but it has been this way since the install in February. I rebuild pumps all the time (Automatic transmission rebuilder) and that one was removed, disassembled, clearance checked, blocked and reassembled. I do wish I had shimmed or put a heavier spring in the relief valve plunger. I cleaned the valve covers and oil pan out, checking the inside of the motor. Full sized van has different add bolt ons (valve covers, intake and oil pan had to be changed) from the S-10. I ran 5w/30 with Rislone to clean out the block for it's virgin run and changed it @ 1000 miles with 10w/30. I ran that for 2000 more, then tried 10w/30 with the Lucas. The only thing I can think is clearances must be on the large side of spec's inside of the motor. I have put 6,569 miles on it since the install. 20w/50 is my choice in oil for it's next oil change. It is what it is for oil pressure. The motor will live or die, but I'm going to do what I can to improve the oil pressure while it's still running.
|
Originally Posted by Tranzman
(Post 632693)
I put a take out motor into my 98 S-10 SS from an express van (98K on it). When it runs hot running down the road it has about 30PSI. Idling in gear it's about 15PSI. I'm running 10W/30 with Lucas. I'm not happy with it myself, but it has been this way since the install in February. I rebuild pumps all the time (Automatic transmission rebuilder) and that one was removed, disassembled, clearance checked, blocked and reassembled. I do wish I had shimmed or put a heavier spring in the relief valve plunger. I cleaned the valve covers and oil pan out, checking the inside of the motor. Full sized van has different add bolt ons (valve covers, intake and oil pan had to be changed) from the S-10. I ran 5w/30 with Rislone to clean out the block for it's virgin run and changed it @ 1000 miles with 10w/30. I ran that for 2000 more, then tried 10w/30 with the Lucas. The only thing I can think is clearances must be on the large side of spec's inside of the motor. I have put 6,569 miles on it since the install. 20w/50 is my choice in oil for it's next oil change. It is what it is for oil pressure. The motor will live or die, but I'm going to do what I can to improve the oil pressure while it's still running.
|
I had the exact same problem, turns out I need an engine. I would check it with a mechanical gauge and go from there.
|
| All times are GMT -5. The time now is 06:13 PM. |
© 2021 MH Sub I, LLC dba Internet Brands