oil pressure WTF??????
11-02-2003, 01:15 PM
#1
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oil pressure WTF?????? before i did anything to my car the oil pressure was fine. when i turned dthe car off the oil pressure remained at 40 psi. on a cold start it went up to 55 till it warmed up and wot up to about 70-75 or so. since ive done the headers and cam on a cold start its at around 45, idling around 38, wot at around 60-65, adn when i turn the car off it falls to 20???? whats going on? is this a sign my oil pump is going out? if it is which one should i get? SLP or Katech? help me out guys. anythiing similar happening to you? thanks in advance.
11-02-2003, 01:29 PM
#2
Originally Posted by ssfiress
before i did anything to my car the oil pressure was fine. when i turned dthe car off the oil pressure remained at 40 psi. on a cold start it went up to 55 till it warmed up and wot up to about 70-75 or so. since ive done the headers and cam on a cold start its at around 45, idling around 38, wot at around 60-65, adn when i turn the car off it falls to 20???? whats going on? is this a sign my oil pump is going out? if it is which one should i get? SLP or Katech? help me out guys. anythiing similar happening to you? thanks in advance.
11-02-2003, 01:41 PM
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im using amsoil 5w- 30. ive always used 5 30 should i be running a different viscosity? what do you mean by its just teh default gauge. mine used to show 40 and now its 20 when the car is off. ive got the amsoil filter as well.
11-02-2003, 03:29 PM
#5
My guage doesn't always top at 40 psi, when the ignition is off. Sometimes, it can go all the way down to 0psi. Some guage will go to a certain reading when the system is off, even though they aren't actually measuring anything. Your oil sounds fine to me, also. It's not the problem. How many quarts are you running? Have you always used the Amsoil filter? Please send me a private message.
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11-03-2003, 12:57 PM
#9
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Originally Posted by ssfiress
now its down to 10 psi with the engine off.
You should be getting ZERO oil pressure when you shut down the engine. How can an oil pump make pressure when it's not turning? If you indicate oil press after you shut the engine down, your gauge or sending unit is screwed up.
You need about 40 psi during hot idle, and somewhere close to about 55 psi at highway speeds [oil hot]
11-03-2003, 06:42 PM
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Originally Posted by Tin Indian
You need about 40 psi during hot idle, and somewhere close to about 55 psi at highway speeds [oil hot]
That said, I would probably worry if you were not pushing at least 20 psi at idle on the hottest of days, after abusing the crap out of your engine.
55psi while cruising on the highway? I never see that on a summer day! I am only at 1700 rpms...
Why not use autotap or something similiar to chekc it and see what the sensor is actually reading. This way you can see if the gauge really is messed up.
Tommy
11-03-2003, 07:49 PM
#11
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The guy that started this thread stated: "now its down to 10 psi with the engine off."
I said, that it should read ZERO with the engine turned off! How the hell can he have oil pressure on an engine that is not running?
TaTommy says: "I'm not entirely sure what your definition of "need" is, but if you have 10 psi of oil pressure at idle, you are in no danger of ruining anything..."
When did I say all you need is 10 psi at idle? If he had 10 PSI at idle, he would be looking at a low oil pressure light.
This whole thread is a waist of time ....
I said, that it should read ZERO with the engine turned off! How the hell can he have oil pressure on an engine that is not running?
TaTommy says: "I'm not entirely sure what your definition of "need" is, but if you have 10 psi of oil pressure at idle, you are in no danger of ruining anything..."
When did I say all you need is 10 psi at idle? If he had 10 PSI at idle, he would be looking at a low oil pressure light.
This whole thread is a waist of time ....
11-03-2003, 08:21 PM
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Originally Posted by Tin Indian
When did I say all you need is 10 psi at idle? If he had 10 PSI at idle, he would be looking at a low oil pressure light.
I stated that 10psi is fine at idle as far as not damaging anything goes.
I know YOU said you NEED 40 psi at idle.
I also understand that the guy's problem is his gauge is "F"ed up because it should be reading zero when the engine is off, not 10psi.
OK, I'm going to bed!
Tommy
