Re: Oil Pump Pressure Relief spring
Still trying to figure this oil pump stuff out.
I managed to get a gm standard pressure spring #3814903 from a Chevy dealer (picture 1), and it came in an unopened bag.
I was talking to a fellow Mid-Atlantic Chapter member and he said he had a setup to test the pump. It is a rear main bearing cap with a oil pressure gauge attached at the oil passage. Picture 2 is the setup with my pump attached and the standard pressure spring installed. Picture 3 is a jig I build to hold everything instead of hand holding it.
The drill I used is rated at 3,000 RPM at the highest speed, and since it would be equivalent to distributor RPM, at the highest speed it is 6,000 crank RPMs. Unless I'm confused!
The oil I am using for the test is Rotella T4 15W-40.
So when I spin up the pump with the drill, it goes to 60 pounds and sits there. I have been assuming that with a 45 pound pressure relief spring, that the pressure would not go above 45 pounds!
The oil is obviously cold, so with this cold higher viscosity oil will the pump push pressure above the supposed 45 pound pressure relief of the
Still trying to figure this oil pump stuff out.
I managed to get a gm standard pressure spring #3814903 from a Chevy dealer (picture 1), and it came in an unopened bag.
I was talking to a fellow Mid-Atlantic Chapter member and he said he had a setup to test the pump. It is a rear main bearing cap with a oil pressure gauge attached at the oil passage. Picture 2 is the setup with my pump attached and the standard pressure spring installed. Picture 3 is a jig I build to hold everything instead of hand holding it.
The drill I used is rated at 3,000 RPM at the highest speed, and since it would be equivalent to distributor RPM, at the highest speed it is 6,000 crank RPMs. Unless I'm confused!
The oil I am using for the test is Rotella T4 15W-40.
So when I spin up the pump with the drill, it goes to 60 pounds and sits there. I have been assuming that with a 45 pound pressure relief spring, that the pressure would not go above 45 pounds!
The oil is obviously cold, so with this cold higher viscosity oil will the pump push pressure above the supposed 45 pound pressure relief of the
gm standard pressure spring #3814903?
I'm still confused!!!!
Thanks,
Don
I'm still confused!!!!
Thanks,
Don
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