Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 4/2014 850 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

strange noise at cold start 850

posted by  someone claiming to be marty on  Tue Jul 19 10:47 CST 2005 [RELATED]

I notice this low pitched "howl" also ..... if you don't think that it's a major item, such as the timing belt tensioner or idler pulley, you may just be hearing the air pump at work.... it's part of the emission control system, and shuts itself down once the exhaust system is up to temperature... the engine temperature is not the determining factor. The air pump operates only to control low temp start-up emissions, and is such a common source of concern, that it's even mentioned in some of the fine print in the Volvo owners manuals.
Good luck

Marty

'96 855T






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New strange noise at cold start [850]
posted by  someone claiming to be slimV  on Tue Jul 19 06:31 CST 2005 >


<< < > >>



©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.