Volvo RWD 140-160 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 7/2003 140-160 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

164 Rocker Shaft Bolts - Helicoil Help 140-160

posted by  PDXDave on  Mon Jul 31 15:55 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I'm slowly getting my '72 164E back on its feet after the head gasket failed back this winter. I was putting the rocker shaft back on today when I found that no bolt will torque in one of the holes. It looks like it's time for helicoil.
I do not have any experience using helicoil. I have seen it done a few times and am pretty good at following directions. I mainly need to know what size to buy. I don't have a caliper to measure the diameter of the bolt with.
Thanks in advance for your help.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    164 Rocker Shaft Bolts - Helicoil Help 140-160

    posted by  Rhys on  Mon Jul 31 19:32 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue Nov 20 10:22 CST 2012
    [RELATED]

    The rocker shaft hold-down bolts are 5/16 UNC, which is a very common size for helicoils. It sounds like the head is on the block, which is too bad because it is a job best done (and most easily done) in a drill press. That will keep the hole perpendicular and perfectly round, which is tougher with a hand drill. Nonetheless, you should be successful first time. If you buy the kit, try one first on some other small item and get the hang of it.







    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      164 Rocker Shaft Bolts - Helicoil Help 140-160

      posted by  PDXDave on  Mon Jul 31 20:07 CST 2006
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      Perhaps I'd be better served to tap it to the next size up. I wonder if a 9/16 bolt would fit through the hole in the rocker shaft.








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        164 Rocker Shaft Bolts - Helicoil Help 140-160

        posted by  someone claiming to be joseph morton on  Tue Aug 1 05:23 CST 2006 [RELATED]

        You can coil this on the block but try to borow a large drill moter for low speed and hi torq & stabel control. Dont try this with your ryobi.








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

        164 Rocker Shaft Bolts - Helicoil Help 140-160

        posted by  walrus3 on  Tue Aug 1 03:29 CST 2006
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Mon Dec 2 14:20 CST 2013
        [RELATED]

        NO!!
        Use the 5/16" kit. It is easy.
        You will have to get the tap for it also and if they offer you an installer
        tool you would be well-advised to get it also.

        One of the rocker shaft bolt holes also carries an oil passage.
        By all means you don't want to use a 3/8" bolt in that one and it
        would definitely be better to use the same size in all of them if
        possible.

        Normally unless you had a bolt that was too short, you would break the
        bolt before you would strip the threads in the head. It is really important
        to use the right length bolt to get a proper length of thread engagement.
        --
        George Downs Bartlesville, Heart of the USA!







<< < > >>



©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.