stripped thread/s in head

  1. Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project
    #1
    Whats best to do with a stripped thread where the exhaust manifold bolts on? If i drilled it and tapped it to say m10 could i use a helicoil to bring it back to m8 size?

    Cheers
  2. Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project
    #2
    Quote:
    Originally Posted by Ben_SaxoForte View Post
    Whats best to do with a stripped thread where the exhaust manifold bolts on? If i drilled it and tapped it to say m10 could i use a helicoil to bring it back to m8 size?

    Cheers
    Edit: its just one or maybe 2 that need doing not all
  3. Frequent Poster Joined: Apr 2012 Bradford/Leeds Posts: 775 03 R53 Mini Cooper S with a little extra going on
    #3
    just tap it for an m8 helicoil now probably wont need to drill
  4. Saxperience Forum Bum Joined: Aug 2010 Midlands Posts: 2530 AX 16v Turbo
    #4
    Helicoil kits come with their own drill size and tap so you have to use what's in the kit. Get a proper helicoil kit though.
  5. Saxperience Forum Bum Joined: Jul 2010 South Wales Posts: 3078 ZX 16v, 205 GTI, 309 Goodwood, 405 MI16.
    #5
    you don't "tap it to M10" then helicoil, you tap it to the right size to fit an M8 helicoil, which is a different thread pitch to M10.

    use a Timesert however, much stronger than a helicoil, similar installation technique, but its an insert that fits very tightly due to the installation process, rather than just some wound wire.

    They do cost more, so may make more sense to get an engineering shop to sort it out for you rather than buying the kit yourself, depends what you can get hold of, distributed by Wurth BTW.
  6. Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project
    #6
    Thanks for the replies will have a look at the helicoil kits etc and have a go at sorting it soon!
  7. Saxperience Forum Bum Joined: Dec 2009 Uckfield, East Sussex Posts: 3362 Citroen saxo 1.4 furio
    #7
    Timeserts ftw