34A exhaust clamp bolts

[tony]

Having lost one of the bolts that clamp the exhaust to the head I need another one. For ease I want to use an Allen key type - can some one tell me the length and thread required please -

[Brian Thompson]

Thread pitch gauge....

Hi Tony,

You ought to get a set of these for your toolbox. I have three sets that cover most imperial and metric applications. Very handy for jobs like this.

https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1DVCJ_enGB655GB655&ion=1&espv=2&ie=UTF-8#q=metric%2Fimperial+thread+pitch+gauge

Brian.

[Colin Sparrow]

Why not take the other one out and measure it?

If you can then find a nut that fits, you could then sort out the right socket-head screws.

[John Wakefield]

Exhaust bolts

It may be a better idea to replace the two bolts with studs & nuts, that way you do not wear the threads in the alloy barrel every time you remove the exhaust. If you strip a thread in the barrel it would require top end strip and taking barrel to an engineering shop to have helicoil insert fitted to repair the thread, but if replaced by a couple of stainless studs & nuts this will not happen.

[dave higgins]

It may be a better idea to replace the two bolts with studs & nuts, that way you do not wear the threads in the alloy barrel every time you remove the exhaust. If you strip a thread in the barrel it would require top end strip and taking barrel to an engineering shop to have helicoil insert fitted to repair the thread, but if replaced by a couple of stainless studs & nuts this will not happen.

Helecoils can be fitted in place with only limited access required, i use them day in day out & kits can be bought of ebay or engineering suppliers for as little as £15.