Why Block The Oil Filter Bypass Valve?

From what I can tell the bypass valve in the oil filter adapter is supposed to open if the filter gets clogged. Guess the reason is better unfiltered oil than no oil at all.

The center of the filter is the output and the backside of the bypass valve is connected to the same port with a very soft spring. This tells me the filter has no resistance to flow during normal operation.

What benefit is there to blocking the filter bypass valve?

-Steve-

You will get lots of opinions on this.

AMC V8 oil filter adaptors had 2 bypasses. The pressure bypass before the filter allows the cam/distributor gear to survive, meters the maximum pressure. This pressure bypass was all it took to allow international cars a long life. The result was a success in the international scene. I do not believe the international filter mounts had a filter bypass. In fact 99% of all external filter mounts do not have a oil filter bypass. What they do rely on is a metering of the maximum oil pressure. If foreign material made it past the pump it made it past the path that lead to the pump and past the oil filter screen. To date there are over 4000 AMC engines out there that have either plugged or had a oil filter adaptor that plugged the bypass. Those are only the ones we helped bypass. Not to count the other 10,000 done by the oil filter adaptor that has been in circulation for 15 years now.

Not one failure has been reported. It is easy to speculate that taking away the bypass would lead the filter to solely do its job based on oil pressure allowed by the pressure valve. But that is what the oil filter is designed to do.

If it works in all other makes that use a remote mounted filter why wouldn't it work in an AMC V8? Besides it already working for years and years?

If you want to collapse a filter run a super high pressure spring. That is a guaranteed collapse.

Lets put it this way. You are running unfiltered oil into your bearings every time you start your motor. You can take a sharp pencil tip and push the filter bypass open without breakin the tip. Its a horseshot mechanism.