pee vee

just wondering.. do oil filters have one way valves in??

so oil dont drain back down thru the pump when engine is switched off..

if so, do All modern filters have them in?

sure i read something once about it, but not sure.


thanks!

JTECH James

iTrader: (13)

they have bypass valves in them, so if the filter is blocked it doesnt stop the oil supply, just bypasses the filter and circulates dirty

dojj

iTrader: (3)

some have valves in them to stop oil returning to the sump from the head, thus not starving the head of oil when you switch off

pee vee

I see. thanks guys!

wondering if mine has one in. As im wondering about the best way of plumbing accusump in..


If the filter has a valve. then i can use one of the oil pressure sender holes (pugs have 2)
if not then i gotta use one of the hoses to the oil cooler and get a one way valve in that..

teamfatboy

This is an interesting read an sums it up really

http://www.autoair.co.uk/Filters.htm

tabetha

I have some nice piccies of a brand new EFL 298(cos 2wd) filter that I cut open about two weeks ago to have a look, if you want ?
Yes the FORD ones certainly do have a anti drain valve in them, but as I found are RUSTY inside, filter was three weeks old, kept in heated garage but rusty, and actual filter media was tiny, I will NOT be using them anymore.
tabetha

AlexF

I'd like a look please Tab

Alex

steve7786

iTrader: (2)

Can you post them up please? It would be interesting to see, would all the filters be of the same design? I'm using an EFL 600 on my zetec. I was looking at the k&n oil filters before but wasn't sure if they were relying on brand name & spiel rather than function.

tabetha

I am more than happy to email the piccies to someone, but am not very good at the puta thing so don't know yet how to post up!!
tabetha
UPDATE piccies now sent to ALEX

AlexF

pics









Full size ones here: http://www.afracing.com/images/oilfilter/full[/url]