[JSchmitz]

I fill my filters. The chances of bearing damage, from momentary oil starvation, are much higher than from contamination in new oil. That's where I'm "placing my chips".

How does everyone feel about blocking the oil filter bypass valve? LOL!

[Tom Vaught]

Originally Posted by JSchmitz

I fill my filters. The chances of bearing damage, from momentary oil starvation, are much higher than from contamination in new oil. That's where I'm "placing my chips".

How does everyone feel about blocking the oil filter bypass valve? LOL!

In some applications the mod has benefits, perhaps one being racing as
the HO Guys recommended that mod years ago.

That being said the bypass is there for a couple of reasons:

Filter plugged or very cold start-up conditions where the oil needs a path
to the oil galleries vs shearing the oil pump shaft.

That is why the OEMs test at -40 degrees F in Canada.

Tom V.

[Dragncar]

Originally Posted by Tom Vaught

In some applications the mod has benefits, perhaps one being racing as
the HO Guys recommended that mod years ago.

That being said the bypass is there for a couple of reasons:

Filter plugged or very cold start-up conditions where the oil needs a path
to the oil galleries vs shearing the oil pump shaft.

That is why the OEMs test at -40 degrees F in Canada.

Tom V.

Yes but they recommended using a Lee filter with a internal by pass that is not even available anymore.
I am not even sure if we have available paper filters with a built in by pass these days. Maybe we do but I am no fan of blocking the PMD by pass.
Dirty oil is better than no oil.

[Formulajones]

Wix filters state they have a bypass valve. Some filter companies just call it a differential pressure relief valve. It's there in case the filter gets clogged.

So I did a quick search to see if others pop up and surprisingly enough it's stated in several articles that most of your paper spin on filters now incorporate a bypass valve. I know the Wix does because I cut those open on a semi regular basis. I haven't cut open any other brand in a long time so can't say for sure.

[Tom Vaught]

Originally Posted by Dragncar

Yes but they recommended using a Lee filter with a internal by pass that is not even available anymore.
I am not even sure if we have available paper filters with a built in by pass these days. Maybe we do but I am no fan of blocking the PMD by pass.
Dirty oil is better than no oil.

I AM ALL SET ON FILTERS, I bought a case of the Lee filters, years ago,
and that will cover me for good filters for my vehicles.
No need for other "Alternatives" for the oiling system.

Kind of like the 100 quarts of oil. No worries.

Tom V.