oil pressure?
#1
oil pressure?
I have a 98 Trans am with 140k. The oil pressure at idle is at the line right before the red Mark but when I'm driving it goes up to 40 or more. Is that normal?
#2
Im pretty sure a Bird rolls the same way but it sure doesn't sound normal. My car for instance, 95 Bird with 160k and an oil leak at the sensor......
From a cold start: 80
Few miles of driving (~10 miles): 45
Longer drives: 35
All at a redlight/standstill....mind you I have a leak. So I expect it to get better after that's fixed. I'd get yours checked out
From a cold start: 80
Few miles of driving (~10 miles): 45
Longer drives: 35
All at a redlight/standstill....mind you I have a leak. So I expect it to get better after that's fixed. I'd get yours checked out
#3
Im pretty sure a Bird rolls the same way but it sure doesn't sound normal. My car for instance, 95 Bird with 160k and an oil leak at the sensor......
From a cold start: 80
Few miles of driving (~10 miles): 45
Longer drives: 35
All at a redlight/standstill....mind you I have a leak. So I expect it to get better after that's fixed. I'd get yours checked out
From a cold start: 80
Few miles of driving (~10 miles): 45
Longer drives: 35
All at a redlight/standstill....mind you I have a leak. So I expect it to get better after that's fixed. I'd get yours checked out
#5
My '95 Z reads a little low as well. Though I've heard many LT1s runs low psi regularly.
All readings taken from the in-dash gauge.
Cold idle: around 40
Cold driving: >50 (50 to 55)
Hot idle: 20-21
Hot driving: <40 (38 maybe)
When the RPM drops off idle to let the clutch out, it dips closer to the red, but as soon as the RPM climbs, pressure approaches 40. Dipstick shows a full oil pan.
I want to hook up a mechanical pressure gauge and see if the in-dash is accurate or not. I'd be happier with about 10 extra psi across the board.
All readings taken from the in-dash gauge.
Cold idle: around 40
Cold driving: >50 (50 to 55)
Hot idle: 20-21
Hot driving: <40 (38 maybe)
When the RPM drops off idle to let the clutch out, it dips closer to the red, but as soon as the RPM climbs, pressure approaches 40. Dipstick shows a full oil pan.
I want to hook up a mechanical pressure gauge and see if the in-dash is accurate or not. I'd be happier with about 10 extra psi across the board.
#6
My '95 Z reads a little low as well. Though I've heard many LT1s runs low psi regularly.
All readings taken from the in-dash gauge.
Cold idle: around 40
Cold driving: >50 (50 to 55)
Hot idle: 20-21
Hot driving: <40 (38 maybe)
When the RPM drops off idle to let the clutch out, it dips closer to the red, but as soon as the RPM climbs, pressure approaches 40. Dipstick shows a full oil pan.
I want to hook up a mechanical pressure gauge and see if the in-dash is accurate or not. I'd be happier with about 10 extra psi across the board.
All readings taken from the in-dash gauge.
Cold idle: around 40
Cold driving: >50 (50 to 55)
Hot idle: 20-21
Hot driving: <40 (38 maybe)
When the RPM drops off idle to let the clutch out, it dips closer to the red, but as soon as the RPM climbs, pressure approaches 40. Dipstick shows a full oil pan.
I want to hook up a mechanical pressure gauge and see if the in-dash is accurate or not. I'd be happier with about 10 extra psi across the board.
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#10
#11
TECH Regular
Put some thicker oil in there like 10W40. As an engine wears there becomes more tolerance in the bearings where it builds from.
As oil warms it gets thinner causing lower pressure.
Good luck
As oil warms it gets thinner causing lower pressure.
Good luck
#12
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Join Date: Sep 2005
Location: Bucks County, Pa.
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#13
#15
like mentioned above..use thicker oil 10w40 should be good try if that does anything ,and replace oil pressure sending unit.if the issue is still there you will need to replace oil pump..been there done that
#16
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Also, these pressure readings are ALL higher in the cold winter months.
#17
TECH Junkie
iTrader: (33)
Is my engine the exception on here, as my hot idle pressure NEVER drops below 40 psi (at least according to the factory cluster gauge), and the ~2000 rpm, HOT, cruise/steady state pressure is never below ~55 psi, and WOT HOT pressure is never below ~60-65 psi???
Also, these pressure readings are ALL higher in the cold winter months.
Also, these pressure readings are ALL higher in the cold winter months.