Oil pressure random drop
Thread Starter
Staging Lane
Joined: Mar 2011
Posts: 68
Likes: 4
Oil pressure random drop 6.0
bored .040
Brand new flat top pistons
ported meling pump
Small cam
New valve train
Idle cold 55 - 60 psi
idle hot 40 psi
Did two 10 min idle warm up cycles no issues.
Weather changed and I was able to drive it today
2500-3000k 70 psi
around 1k 40ish psi
after about a mile which included stopping shifting rpms ranging from idle to 3k (under 50 mph and under 35% throttle) I stopped as I noticed I lost a tool in the road. It sat and idled for about 5 mins.
when I got back my check oil warning was on and it was at 7.8 psi! I drove it down my long driveway around 1200 rpm and it never changed.
No noises, gave it a little rev when I parked it (1500 rpm) and still 7.8.
When I looked back at the data log @2700 rpm I had 72 psi
Later @2700 it had 45 psi
Idle went down to 12 psi
Running 5w30 valvoline for the break in with a wix filter. Any ideas?
bored .040
Brand new flat top pistons
ported meling pump
Small cam
New valve train
Idle cold 55 - 60 psi
idle hot 40 psi
Did two 10 min idle warm up cycles no issues.
Weather changed and I was able to drive it today
2500-3000k 70 psi
around 1k 40ish psi
after about a mile which included stopping shifting rpms ranging from idle to 3k (under 50 mph and under 35% throttle) I stopped as I noticed I lost a tool in the road. It sat and idled for about 5 mins.
when I got back my check oil warning was on and it was at 7.8 psi! I drove it down my long driveway around 1200 rpm and it never changed.
No noises, gave it a little rev when I parked it (1500 rpm) and still 7.8.
When I looked back at the data log @2700 rpm I had 72 psi
Later @2700 it had 45 psi
Idle went down to 12 psi
Running 5w30 valvoline for the break in with a wix filter. Any ideas?
Thread Starter
Staging Lane
Joined: Mar 2011
Posts: 68
Likes: 4
I'm going to pull the oil pressure gauge and make sure it didnt get anything in it. My first oil change had some sparkles (seemed normal for a new engine)
Rear main seal is leaking a little. It was leaking a lot but I fixed most of the leak with a better pvc system. Now it's just a few drops.
Oil is right at the full line.
I was thinking of adding a extra quart (bring it to 6.5) and see if that helps
Rear main seal is leaking a little. It was leaking a lot but I fixed most of the leak with a better pvc system. Now it's just a few drops.
Oil is right at the full line.
I was thinking of adding a extra quart (bring it to 6.5) and see if that helps
Thread Starter
Staging Lane
Joined: Mar 2011
Posts: 68
Likes: 4
Filter is fine
new gm sensor (20 mins on it) using hp tuners to tune it.
Connector was fine I'll get the sensor off tomorrow
Connector was fine I'll get the sensor off tomorrow
Thread Starter
Staging Lane
Joined: Mar 2011
Posts: 68
Likes: 4
I could not get the oil pressure switch off (my deep well is not at home) so I filled it with 6.5 quarts just to be sure. Check all the lines, fuses ect.
Oil pressure said .8 before cranking
Started it and it still said .8
After 5 secs I turned it off
oil says -2.2 now
started it and still says - 2.2.
said *** it and let it run 10 secs. Went from cold idle 1100 to 800 and never changedchanged it off.
I should have my deep well tomorrow and well investigate.
Oil pressure said .8 before cranking
Started it and it still said .8
After 5 secs I turned it off
oil says -2.2 now
started it and still says - 2.2.
said *** it and let it run 10 secs. Went from cold idle 1100 to 800 and never changedchanged it off.
I should have my deep well tomorrow and well investigate.
Trending Topics
Do not start the car again. I’d put money on it being the relief spring in the pump. Happening here lately to a couple folks. It’s a boat load of work, but if it were mine, I’d pull the oil pump and take a look. It’s visible through the window on the back side of pump.
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Joined: Mar 2019
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6.0
bored .040
Brand new flat top pistons
ported meling pump
Small cam
New valve train
Idle cold 55 - 60 psi
idle hot 40 psi
Did two 10 min idle warm up cycles no issues.
Weather changed and I was able to drive it today
2500-3000k 70 psi
around 1k 40ish psi
after about a mile which included stopping shifting rpms ranging from idle to 3k (under 50 mph and under 35% throttle) I stopped as I noticed I lost a tool in the road. It sat and idled for about 5 mins.
when I got back my check oil warning was on and it was at 7.8 psi! I drove it down my long driveway around 1200 rpm and it never changed.
No noises, gave it a little rev when I parked it (1500 rpm) and still 7.8.
When I looked back at the data log @2700 rpm I had 72 psi
Later @2700 it had 45 psi
Idle went down to 12 psi
Running 5w30 valvoline for the break in with a wix filter. Any ideas?
bored .040
Brand new flat top pistons
ported meling pump
Small cam
New valve train
Idle cold 55 - 60 psi
idle hot 40 psi
Did two 10 min idle warm up cycles no issues.
Weather changed and I was able to drive it today
2500-3000k 70 psi
around 1k 40ish psi
after about a mile which included stopping shifting rpms ranging from idle to 3k (under 50 mph and under 35% throttle) I stopped as I noticed I lost a tool in the road. It sat and idled for about 5 mins.
when I got back my check oil warning was on and it was at 7.8 psi! I drove it down my long driveway around 1200 rpm and it never changed.
No noises, gave it a little rev when I parked it (1500 rpm) and still 7.8.
When I looked back at the data log @2700 rpm I had 72 psi
Later @2700 it had 45 psi
Idle went down to 12 psi
Running 5w30 valvoline for the break in with a wix filter. Any ideas?
single or double row chain?
Last edited by KT35; Feb 26, 2020 at 01:11 PM. Reason: spelling
