Volvo RWD Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 7/2006

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Oil pump drive bolt failure

posted by  HillBilly on  Sat Apr 13 09:50 CST 2013
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 16 08:26 CST 2014
[RELATED]

I'm not a metallurgist, so my opinion is based on experience only.
I've been around welding amd machinery manufacturing for over 45 years and have specified and used many different grades of bolts made from various materials.
So for what that is worth.....

The bolt looks hardened to me.
I say that because of the appearance of the bolt, it's surface and the way that the bolt fractured.
I would guess it failed because it was over tightened during it's installation.
Either that or it was supporting a heavy load under a severe vibration.
Sometimes a lower grade (softer) bolt will work better in that type of environment.
If I was really curious about the hardness of the bolt I would try to score it with a punch. If it won't score, or is extermely hard to score, the metal is hardened.....either that or have it tested in a lab.

Just my opinion
steve






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Oil pump drive bolt failure
posted by  Art Benstein subscriber  on Fri Apr 12 19:54 CST 2013 >


<< < > >>



©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.