helicoils

Garn 1 · #16 PostAuthor: **Garn 1** » Sat Nov 26, 2011 10:33 pm

Kev, that's a great solution.. "Thinking outside the box". I seem to remember us talking about this some 5 years ago! Great job.
RegardZ.

sme · #17 PostAuthor: **sme** » Wed Nov 30, 2011 7:13 pm

is the m6 a 1.0 thread pitch ?

what type of bolts are best used for replacing the cam bolts ?

the timeserts is a usa website,
can they be bought in the uk?

kev edwards · #18 PostAuthor: **kev edwards** » Thu Dec 01, 2011 8:56 am

The very same type that came out, high tensile bolts, not the sort you would get from b and q, i'm sure if you put a wanted thread on here we could all supply enough to make up a set.

PETER KZ1A · #19 PostAuthor: **PETER KZ1A** » Wed Feb 08, 2012 1:36 pm

: Helicoils ok,timeserts are very good,had a gpz head done years ago,Kev's idea,very good. Pay a few more dollars for timeserts Wurth it :roll:

sme · #20 PostAuthor: **sme** » Wed Feb 08, 2012 1:42 pm

what is the pitch then?

Jeff Saunders · #21 PostAuthor: **Jeff Saunders** » Wed Feb 08, 2012 3:24 pm

time-serts... do once and forget about it.

Many racers install time-serts in perfectly good spark plug threads - they last well. Heli-coils in an area where you don't typically remove a bolt is OK, but in any area where you are likely to remove bolts often, never use a heli-coil.

#22 PostAuthor: **Ginger Bear** » Wed Feb 08, 2012 4:55 pm

sme wrote:what is the pitch then?

M6 x 1.0

jimmock · #23 PostAuthor: **jimmock** » Fri Feb 10, 2012 7:56 pm

Guyz,

Personally I am impressed with the "stud" conversion.

Studs are far better than bolts for applications such as cam caps for two reasons.....

1) The stud is always kept in the head so thus no chance of damaging or stripping the threads in the soft head material.

2) Better torque loading as the load is being "split" equally between two threads and not one.

Jimmock one and a half lathes!!

samspoons · #24 PostAuthor: **samspoons** » Sat Feb 11, 2012 7:41 am

I have used an insert from this country called keenserts which sound the same method as the american inserts. These are a superb bit of kit, the only draw back being you need a lot of meat around the damaged hole to drill bigger to accomodate the insert. On the whole it is worth paying the extra to get a good job.

kev edwards · #25 PostAuthor: **kev edwards** » Sat Feb 11, 2012 9:20 am

SO there you have it, several options, if i had the problem in front of me again i would still use my studs, at the time 16 time serts or helicoils was cost prohibitive and the studs were bolts i already had and only cost time, i had to do something or get rid of the bike, i have used inserts in various jobs, but now for me on these top ends there is only one way to go.

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