smokin90
Registered User
What is the normal oil pressure for a 7.3l diesel 1989 NA
OIL PRESSURE
- Thread starter smokin90
- Start date
jonathan
Full Access Member
7 to 30 psi
Low, 10-15 hot idle, 40 hot going down the road.
icanfixall
Official GMM hand model
Thats about what it is... These oil pumps push out 18.2 gallons per minute... Thats plenty of volume to work these engines hard...
smokin90
Registered User
i put a manual gauge on it today had it running for about 5 mins before i did and the pressure was 45psi and reved it up to 1500-2000 and it went to 60psi
If that was on a cold engine, that sounds normal...if that's on a hot engine, either you've got amazingly good pressure or something's up with the gauge.
I need to get a decent gauge on my truck...I have a mechanical gauge, but it's saying that I'm sitting at about 35 psi (or a hair lower) at 65...I'm hoping it's just a low quality gauge and not indicating that I have a problem...
smokin90
Registered User
yea it was on a cold engine
Diesel JD
Full Access Member
I wouldn't worry about 35psi running down the road. Where is your gauge plumbed in? I found more oil pressure when I moved the sender to the port near the bellhousing and oil cooler. It doesn't matter on a N/A as much but the turbo is a big oil consumer so you'll scare yourself with unusually low readings if it's close to the top of the engine or so I have read.
Silver Burner
Burnin' Oil&Rubber
Maybe that's why the stock dummy gauge on my truck always reads so low....
gatorman21218
Registered User
on mine its COLD - 47 idle, 60-70 driving. HOT- 20 idle, 45 driving
This is measured on a S-W mechanical gauge fed off a line "tee-d" into the factory location
This is measured on a S-W mechanical gauge fed off a line "tee-d" into the factory location
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Kevin 007
Full-floater
Hey new member here.
So with an idi with the stock sender on the bellhousing like you mentioned. When a guy wants to put in a mechanical gauge, do you simply remove the sendor and screw in the aftermarket fitting and run the line to the gauge?
So with an idi with the stock sender on the bellhousing like you mentioned. When a guy wants to put in a mechanical gauge, do you simply remove the sendor and screw in the aftermarket fitting and run the line to the gauge?
smokin90
Registered User
well then it sounds like its ok by what you all are saying
HammerDown
Full Access Member
To keep my OE gauge functioning I left the sender, plumbed in a sideways (T) fitting and attached my mechanical line to it coming out the side.
gatorman21218
Registered User
this is how I did it as well. IIRC its 1/4"NPT. What i did do in addition is I put a ball valve coming off the side of the tee. I have my gauges set up under the dash and if the gauge (either the oil or the fuel gauges) and or tubing ever fail then I can just close the valve and continue driving. I aint worried about oil getting on my rubber floor mat, its just an old work truck and my boots could use an oiling anyways
. What concerned me was if I didnt have the valve and the gauge sprung a leak, I would have to call a wrecker b/c the engine would pump all the oil out of the engine.
