How much oil pressure at idle?
05-18-2004, 03:34 PM
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Car: 1983 Trans Am
Engine: 355 SBC
Transmission: 700R-4
How much oil pressure at idle?
How much oil pressure should I have at idle?
When my car is cold, I have about 40 psi at idle.
When my car warms up to 190 degrees, it drops to about 20 psi at 600 rpm. As soon as I touch the gas, it shoots up to about 40-45 psi at about 1500 rpm. Is this normal?
Steve
When my car is cold, I have about 40 psi at idle.
When my car warms up to 190 degrees, it drops to about 20 psi at 600 rpm. As soon as I touch the gas, it shoots up to about 40-45 psi at about 1500 rpm. Is this normal?
Steve
05-18-2004, 04:51 PM
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Car: 1998 Camaro Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
Mobil One Full Synthetic Oil
75K Miles LO3
45 psi at idle cold ~600-700 rpm
30 psi hot idle back to 40-45 1500 rpm
So, I would say you are in the ball park.
How many miles on the engine?
75K Miles LO3
45 psi at idle cold ~600-700 rpm
30 psi hot idle back to 40-45 1500 rpm
So, I would say you are in the ball park.
How many miles on the engine?
05-18-2004, 06:30 PM
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Car: Iroc-Z
Engine: 355 AFR'd HSR
Transmission: 700R4
Usually anything lower than 20psi is an indication that your bearings are worn down pretty far. My car idles at roughly 30psi and will go to about 50-60 upon acceleration. If you get under 20psi at idle I'd very seriously consider a rebuild before you spin a bearing on the crank or the rods and cause yourself to cry because of all the machine work/replacement parts buying you'll have to do. 20psi seems VERY low.
05-18-2004, 06:44 PM
#6
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Increase the idle speed a little and forget about it.
05-18-2004, 07:03 PM
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Car: 1983 Trans Am
Engine: 355 SBC
Transmission: 700R-4
My engine is just rebuilt, brand new bearings, crank, rods, everything. I just checked the oil and it is full.
The car usually idles pretty high, sometimes up to 1000 rpm. So when that happens, I have plenty of pressure.
I only run mineral oil, as the engine only has about 1250 miles on it, with some Lucas Oil Stabilizer in there. That might be some reason as it makes oil stick to surfaces instead of washing off them.
Steve
The car usually idles pretty high, sometimes up to 1000 rpm. So when that happens, I have plenty of pressure.
I only run mineral oil, as the engine only has about 1250 miles on it, with some Lucas Oil Stabilizer in there. That might be some reason as it makes oil stick to surfaces instead of washing off them.
Steve
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05-20-2004, 11:48 AM
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Car: 1983 Trans Am
Engine: 355 SBC
Transmission: 700R-4
The car is great! I got a lot of the bugs worked out and it's finally becoming the car that I wanted it to be. Although I found out over spring break that the engine is too powerful for the transmission and had to get the tranny rebuilt. Other than that, it's lookin good.
Steve
Steve
05-20-2004, 10:27 PM
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Car: 1983 Trans Am
Engine: 355 SBC
Transmission: 700R-4
I am back in Redford for the summer. If I have any issues I will definitely give you a call, but right now I am looking to sell/trade my car for something a little more economical. By the way, what are you runnin right now??? I can never keep up with your car adventures!
Steve
Steve
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