Air Filter Question

Jay247 · Aug 19, 2019

Just wondering do people leave the foam/cotton around the outside of the filter or do they remove it? What is it's exact purpose?

Just going to fit a new one soon and wondered if it was very restrictive and if I needed it at all.

Thanks

websun · Aug 19, 2019

I personally don't think is restricting at all, seems quite fluffy. You will not gain any performance by removing it. Not 1hp

dog-man · Aug 19, 2019

I have tried both and saw / felt no difference in performance on my 2006 TD4.

Jay247 · Aug 19, 2019

Ok thats quite interesting, I didn't know what the purpose of the foam/cotton whatever it is actually was.

websun · Aug 19, 2019

Extra filtration I guess, although not much dirt gets there to be honest.

Nodge68 · Aug 20, 2019

Jay247 said:
Just wondering do people leave the foam/cotton around the outside of the filter or do they remove it?

I remove it myself.

Jay247 said:
What is it's exact purpose?

It stops large amounts of sand from clogging the filter paper.

Jay247 said:
Just going to fit a new one soon and wondered if it was very restrictive and if I needed it at all.

I did a vacuum flow test on a small sample, and it does cause a slight restriction.

Jay247 · Aug 20, 2019

Thank you appreciate the reply.

Air Filter Question

Jay247

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websun

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dog-man

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Jay247

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websun

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Nodge68

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Jay247

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