Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 2/2006 850 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Valve Tap? 850

posted by  kyswisher on  Tue Jun 8 07:24 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Jun 26 07:44 CST 2014
[RELATED]

My '93 850 now has 280,000 miles on it and recently the tapping from under the hood (especially when the engine is under increased load) has increased. I assume valve tapping. Do you have any recommendations to forestall major repairs?








  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

    Valve Tap? 850

    posted by  KlausC on  Tue Jun 8 10:43 CST 2004
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    With almost 300K miles, I assume you are using synthetic 5w30. Verify the tappet noise by unscrewing the oil filler cap at idle, carefully. Is the cam getting lots of oil? If not, it may be time to get a top end overhaul. Hydraulic lifters use oil pressure to keep the valve clearance constant, if one of these lifters has retired, it needs to be fixed very soon to prevent further damage.

    Klaus
    --
    95 854T, 88 780, 88 245








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Valve Tap? 850

    posted by  someone claiming to be Matt on  Tue Jun 8 08:38 CST 2004 [RELATED]

    Hi

    Is this a similar noise to the light tap you can sometimes hear when you start it? In which case an oil change/flush would probably help.

    Under load could indicate a 'knock' from the bottom end, are you sure the noise is from the top of the motor?

    I would get a shop that knows Volvo's to have a look.
    Matt
    1993 850 GLT auto.







<< < > >>



©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.