Oil pressure slowly dropping....worried!!!
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Teching In
Joined: Aug 2003
Posts: 14
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Oil pressure slowly dropping....worried!!! Ive posted before about this but need you guys' opinions asap!!! i have a 98 Arctic white Z28 M6 w/63K miles...bought the car used 3months ago (ive performed all the typical bolt ons)...car is mint inside and out but noticed when changing the oil for the first time shavings on the drain bolt...changed it again and noticed the same thing...no knocking going on or anything..when i got it a few months ago, the oil pressure at idle cold was around 40-42psi....warm motor idle was about the same and cold going down the road was 40-55psi...over the past few weeks its only been around 36-38psi. at cold idle...warm idle its only 22-23psi!!!! driving when warm its only coming up to around 36-37psi...im really worried...im running part synthetic castrol 10W-40 too...should i run an autometer mech. guage and get a reading or swap oil pumps asap or what??? hope its not the bearings!!! 
Re: Oil pressure slowly dropping....worried!!! geta ported oil pump first, since that will be the cheapest way to do it. if that doesnt do it, time to invest in a stroker... 
Re: Oil pressure slowly dropping....worried!!! 1st, start running full synthetic (I'm happy with Mobil 1). 2nd, invest in a ported LS6 pump. The pre-01 pumps were not the best (many people have had 0 problems....others have had them die...).
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Re: Oil pressure slowly dropping....worried!!! Do not drive the car; get a new oil pump immediately...
Another guy here last week ignored our warning and now has a dead motor....
The Gen 3 factory oil pumps are trash...a GM defect casues many to go bad....
Another guy here last week ignored our warning and now has a dead motor....
The Gen 3 factory oil pumps are trash...a GM defect casues many to go bad....
Re: Oil pressure slowly dropping....worried!!!
The Gen 3 factory oil pumps are trash...a GM defect casues many to go bad....
correction....the 97-00 factory oil pumps are trash. In 01 they hardened the gears to make them hold up.
97-00 = BAD
01+ = GOOD
Thread Starter
Teching In
Joined: Aug 2003
Posts: 14
Likes: 0
Re: Oil pressure slowly dropping....worried!!! update...picked up a TSP ported LS6 oil pump, K&N oil filter, and Autometer mech. guage w/pillar pod for accurate reading...awaiting install...i hope this cures the problem...weird tho how the oil psi. has been slowly dropping off....bearing issue???
TECH Fanatic
Joined: Oct 2002
Posts: 1,255
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From: nor cal (ripon)
Re: Oil pressure slowly dropping....worried!!! IMO if your gonna do a oil pump might as well do a cam swap (since i did all of that 2 days ago)..might as well get something outof all that labor
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