Bypass Valve on Stock Oil Filter Console, Looking for relief pressure of bypass valve to help with design of remote oil filter and cooler Options

[Mr Beckstar]

Hi all.

I have a 4 cylinder 2 litre and am adding a remote oil filter and oil cooler circuit via a spin on adaptor attached to the stock oil filter console mount. But I noticed the oil filter bypass valve in the stock oil filter mount (circled in photo below) and now I’m concerned that, at high rpm, I’ll be bypassing the remote cooler/filter circuit. Does anyone know the bypass valve relief pressure setting? Knowing that would at least allow me to judge whether it’s an issue.

[Mr Beckstar]

The above pressure readings were measured using the bottom 1/3 of a leak down tester pressure gauge so accuracy is a question mark on this method. So I thought I’d verify using a different method.

I just used electronic kitchen scales to measure the force required to crack open the valve (0.45 kg) and to fully open the valve (0.85 kg). I then used vernier calipers to measure the valve seat inner diameter (11.1 mm). If you do the calculations you get 6.6 PSI to crack open the valve and 12.5 PSI to fully open the valve. Quite a lot different to the air pressure readings.

I’ll have to do the actual pressure test on the valve again with improved accuracy as the two methods should somewhat verify each other.