For the past week my '69 - 350 oil gauge has been reading from 10 - 65. At idle it drops down to 10 and then while driving it goes to about 65 and then back to 10 when stopped. Does this sound normal?
The gauge is brand new. Even when the oil reads low and the car has been run for a while, the temp is still in a normal range. Could it be an Oil pump problem?
I feel it may be normal. I have seen plenty of small blocks have that kind of oil pressure, and last for 100k miles.
Do you have any rattle on start up?
You need 10 # of oil pressure for every 1k rpm.
Is it standard or aftermarket gauge? Electrical or mechanical?
A couple more ideas for a standard mechanical console gauge:
My standard console oil gauge had to be bleed of all air after installing my new headers. I disconnected the line when jacking the motor so as not break it. Oil pressure was way off after reinstalling line. I dont know if this air will finally work its way out of the line and I dont know if this is normal to have bleed but it is for my Camaro. Also, you said that the gauge was new. I had to set my new oil gauge to zero years ago. Are you at zero before starting the engine? I believe it is called a free floating guage and the needle pulls off the splined shaft and you reinstall the pointer at zero. Phil
It is a new gauge and mechanical. The line was sitting empty for a week or so, so could have some air...never thought of that. Could I disconnect the line, crank the engine to get flow and reinstall? At 3000 RPM I do get a reading at 65.
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