Volvo AWD 850 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 10/2005 850 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

One Valve or Two? 850

posted by  Valles on  Fri Mar 1 12:19 CST 2002
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I was always under the impression that there were 2 valves inside oil filters.

One is the bypass valve so that excessive pressure doesn't blow the filter when it starts to get dirty and plug up.

The second was the anti-backflow valve so that once the engine was shut off all the oil in the filter wouldn't drain back into the oil pan. If the oil drains out of the filter then the first few seconds of cranking just refill the filter and don't put any oil into the engine.

This guy did some interesting stuff with oil filters. He didn't measure filtering ability, but he did tear them apart.
http://www.frankhunt.com/FRANK/corvette/articles/oilfilterstudy/oilfilterstudy.html


--
Nathan Valles, Black 855R, Tint






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Mann O.E. vs. Amsoil oil filters? [850]
posted by  Mr. Detail  on Fri Mar 1 05:27 CST 2002 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.