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 oil filter bypass valve piqued my interest so I bought a second hand filter console and just did a quick test on the bypass pressure using compressed air. It started bypassing at about 12 PSI and peaked at about 16 PSI with a lot of air flow going through. (Refer next post before using these values!)

Conclusion: if the remote oil filter and/or remote oil cooler circuit has more than 12 PSI pressure drop at highway cruising rpm or hill climbing rpm, then the remote circuit will start bypassing and the performance of those remote components will start to diminish. And, if the pressure drop is upwards of 14 PSI, then the remote circuit will probably not be effective during those cruising/hill climbing rpm just when it’s needed. Of course that assumes the oil is up to full operating temperature.

My guess is that the pressure drop won’t go near 12 PSI if the remote circuit hoses and fittings are generously sized and oil is warmed up. The next stop for me is to measure the pressure differential in the remote circuit at high rpm with oil temp over 190 deg F. If that’s e.g. only 5PSI, then it proves theres absolutely nothing to worry about.