SuperTech vs Purolator

[ym42]

I am using 3600 filters in my Saturn SL, an oversized version of recommended 3614. I had two filters, SuperTech from Walmart and Purolator. I used them both in a past. I can see some sort of device in Purolator at the bottom, some sort of valve, bypass or ADB I do not know. The SuperTech does not have it inside. But, in SuperTech filter no air can come through it unless a reasonable pressure applied where oil comes in, while on Purolator I can blow air freely both ways through the filter. Can you explain this difference?

 

[T-Keith]

They both should have bypass valves and ADBVs they are just different designs. If you have a newer E-core ST then the bypass valve is built into the ADBV at the front of the filter.

-T

 

[Al]

If you look closely at the supertech at the bottom..you will see some tiny holes. There is a "clicker" at the bottom that opens and shuts the bypass holes.

 

[mikemc]

If I am correct, the ST3600 = Motorcraft FL400S. The Motorcraft is a very well made filter with a silicon ADBV that sells for $2.77 at Walmart.

 

[Gary Allan]

quote:

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But, in SuperTech filter no air can come through it unless a reasonable pressure applied where oil comes in,

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This sounds like an Ecore