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Old 04-14-2004, 12:25 PM
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oil pressure guage

I installed a new oil pressure guage and while checking for leaks at the guage while engine running it doesn'e look like oil is getting to the guage. It shows a good amount of oil pressure on the guage. Could there be air trapped in the line before the guage? If so will it give false readings? How do i go about getting the air out? Just loosen the line?

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Old 04-14-2004, 12:28 PM
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Thats what i'd do bring a rag in Loosen the fitting on the back of the guage until oil starts dripping out...But ive been known to screw things up pretty bad though...So lets see what everyone else has to say
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Old 04-14-2004, 01:04 PM
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Ya...thats what to do, there is just some air in the line............
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Old 04-14-2004, 01:25 PM
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I don't think it matters if there is air in there, because the oil is exerting the same amount of pressure on the air as it would the gauge. I would think the pressure gauge is giving you about the same reading. After all there is a diaphragm inside the gauge that uses some form of conversion media to go form oil to mechanical reading. Some use fluid and some use air. Besides if the oil was creeping up the tube you'd have a leak, eventually the oil will displace the air in the tube,l but for now it's good to make sure you have a good seal.

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Mark
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Old 04-14-2004, 03:01 PM
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I've gone to the trouble of bleeding the air from the oil line and as soon as you shut off the motor the oil drains back and you'll have air in the line again.
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Old 04-14-2004, 03:53 PM
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Rhansen is right , it wouldnt hurt to bleed it to make sure... but even with air in the line, it still has pressure,
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Old 04-16-2004, 12:18 PM
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pressure

pressure is pressure it doesn't matter once the air is pressurized to that of the oil it will not make a difference the guage only sees pressure it doesn't know wether it is air or oil. also make sure to run the plastic line through a piece of vacuum line so it doesn't get caught on something and brake leaving 5qrts on your feet and a noisy engine.
Jesse
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