Low oil pressure after H&C
03-06-2009, 05:03 PM
#1
Low oil pressure after H&C Ok so i finally got the torque converter in and installed another tranny cooler etc. etc. Started the car up and i didn't really pay attention to the oil pressure at first, i let it warm up and i decided to take it for a spin. While driving i noticed my oil pressure was around 25-30 psi, i immediately turned around and went back home. I installed a new ported melling oil pump when i did the heads and cam, replaced the o ring pick up tube that it came with and everything was good. The first few times i started the car oil pressure was around 70psi or so now it won't even reach 40psi, could the o-ring be messed up already? I haven't changed my oil and filter yet, and i also put in a new oil pressure sending unit the other day.....Any thoughts on this?
03-06-2009, 05:59 PM
#2
I would change your oil and filter and see what that gives you first. If it remains low I'd probably next hook up a mechanical gauge to see what you're oil pressure is really sitting at. If it is in fact low then you're going to need to go to the o-ring in the pickup tube. It may have gotten pinched or rolled.
03-06-2009, 06:48 PM
#3
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there was another post last week about this same subject maybe it will ease your mind some https://ls1tech.com/forums/generatio...-25-30-ok.html
03-06-2009, 06:52 PM
#4
there was another post last week about this same subject maybe it will ease your mind some https://ls1tech.com/forums/generatio...-25-30-ok.html
You're oil pressure with a ported pump should still be up around 40-45 at a warm idle and around 50 cruising. My 98 T/A with a ported pump and main/rod bearings set up loose still would sit around these values and would jump to 65 or so at WOT...
03-06-2009, 07:36 PM
#5
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If you just changed your cam and heads, you oil pressure should be the same as it was before the swap. If you nick a cam bearing you will loose pressure. I would get your motor fixed before you have really big issues and spin a rod or main bearing.
03-06-2009, 07:40 PM
#6
That thread doesn't make me think that it's ok to be at that low PSI. When i started the car for the first few times, oil pressure was at about 65-70PSI cold and 45-50 warm, now it's around 38psi cold and if it idled correctly it would probably be around 15psi so i obviously have an issue. The last time the car ran (before today) was the last time i had regular oil pressure, since then i installed my torque converter, tranny cooler and replaced my oil pressure sending unit because it was leaking. Where's the other port to hook up a mechanical oil pressure gauge? I'll be pretty pissed if i have to replace that o-ring pickup tube, what would be the easiest way to tackle that?
If one of the mods could move it to Gen III INTERNAL it would be greatly appreciated 
