Sorry forgot the link:

http://wetwesties1.tripod.com/oilfilterstudy/oilfilterstudy-german.html

Robert

----- Original Message -----
From: "Tabe Johnson" <greentabe-vanagon@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, August 29, 2006 9:34 PM
Subject: Re: Re-useable oil filter

> Mike/List,
>
> This is a load of hokum that has been going 'round the list
> for a while.  The only valve in any oil filter is a bypass valve
> which would activate itself if the filter media got too clogged to
> pass enough oil, for instance.
>
> Let's see: How would a valve that kept the lifters from bleeding
> down work?  It would apply oil pressure.  Where does oil pressure
> come from?  The oil pump.  When the engine's off, the pump's off.
> So when the engine's off, there's no oil pressure, regardless of
> how many valves you have in your filter.
>
> tabe johnson/87 westy
>
> PS - speaking of hokum, (and I'm not trying to be aggressive - just
> asking the question) how is it that replacing just one of the two
> pneumatic rear hatch struts can cause it to fail prematurely?  One
> strut doesn't know what the other is doing.  It's just applying
> pressure to a piston, right?
>
>
>
> *** cut here ***
> Date:    Tue, 29 Aug 2006 21:58:33 -0400
> From:    Mike Collum <collum@VERIZON.NET>
> Subject: Re: Re-useable oil filter
>
> But what about the valve in the filter that keeps the lifters from
> leaking down?
>
> Mike