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.

[Superhawk996]

I hate chiming in on this because I don’t have an absolute numerical answer to provide.

Please look at the factory manual diagram closely.

The bypass in the oil filter console is only affected by differential pressure between the inlet and outlet of the oil filter.

Typical oil filters only drop 1-2 psi unless the filter is loaded & beginning to clog. So it should not be surprising to see the console bypass sized to a couple psi what ever that means. It just needs to be set high enough that it only opens when the oil filter is developing too much of a pressure drop from being clogged & too restrictive.

The factory manual doesn’t specify the pressure delta needed to operate this bypass internal to the oil filter console.

If you want an absolute answer, you’re probably going to have to do the math or build a test fixture.



Also keep in mind that most modern oil filters also have a built in bypass. So even if you’re going to try to go to a full flow system, you’ll have to choose the oil filter carefully to find one without a bypass internal to the filter itself.

Unless you’re doing something very unusual with the sizing of your oil pump, or running high viscosity oil (at operating temp), the spin on remote oil coolers are reasonably well proven. Again this assumes you aren’t using a crazy restrictive external oil cooler.