Author Topic: Cam chain bolt drilling!  (Read 654 times)

Offline csrigo

  • Always Involved
  • ****
  • Thank You
  • -Given: 0
  • -Receive: 1
  • Posts: 127
Cam chain bolt drilling!
« on: December 08, 2020, 12:31:46 PM »
Hi folks looking for some tips.

Need to drill the cam adjuster bolt out absolute nightmare. I will cover the oil feed holes prior to drilling however has anybody else done this with success and no dramas?

What method did you use and what size/type of drill bits also...cobalt im assuming?

Any help or tips would be appreciated.

Cheers

Offline doylebros

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 43
  • -Receive: 308
  • Posts: 2768
Re: Cam chain bolt drilling!
« Reply #1 on: December 08, 2020, 08:09:11 PM »
Send dazza (Admin) a message he done the job and a thread all about it.
« Last Edit: December 08, 2020, 08:11:22 PM by doylebros »

Offline Pudding

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 2
  • -Receive: 525
  • Posts: 6083
Re: Cam chain bolt drilling!
« Reply #2 on: December 12, 2020, 05:32:17 PM »
Yeah cobalt drills and just work up in size gradually.  If you drill dead centre, you should have no issues.

If you cheese it up completely, budget for a new a VVT adjuster.  £400ish from VW, or a chance a £100 Chinesium one from ebay.


2007 ED30 | Ohlins Coilovers | Revo Map | Plus some other stuff | Is all a GTI needs :-)

Offline csrigo

  • Always Involved
  • ****
  • Thank You
  • -Given: 0
  • -Receive: 1
  • Posts: 127
Re: Cam chain bolt drilling!
« Reply #3 on: December 24, 2020, 03:33:56 PM »
Cheers folks got it out no problem thankfully. Cars still stripped under the bonnet so will rebuild through lockdown.

Cheers

Offline Wastedspark

  • Just Arrived
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 10
    • Email
Re: Cam chain bolt drilling!
« Reply #4 on: December 25, 2020, 10:47:26 PM »
Nice one, I did this on mine too, once I got up to a 10mm hole I gave it a tap with an impact driver and it came straight out,

Offline Pudding

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 2
  • -Receive: 525
  • Posts: 6083
Re: Cam chain bolt drilling!
« Reply #5 on: December 31, 2020, 11:09:32 PM »
That polydrive bolt is an absolute w@nk stain.  Shame on VW.  It rounds out if you just look at it the wrong way  :doh:


2007 ED30 | Ohlins Coilovers | Revo Map | Plus some other stuff | Is all a GTI needs :-)

Offline csrigo

  • Always Involved
  • ****
  • Thank You
  • -Given: 0
  • -Receive: 1
  • Posts: 127
Re: Cam chain bolt drilling!
« Reply #6 on: January 10, 2021, 11:52:16 PM »
Yeah it was a bit of a pain but more so that I done it on the drive which I wouldn't have done normally...cheers lockdown.

Done an S3's tensioner and chain last year on my mates and it was just lucky that it came off much more easily than mine did this time. @Pudding you are 100% correct a complete dickhead bolt lol.