Helicoils

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 1:02 pm

just ordered some to fix my manifold studs....

What size drill bit and tap do i need. i have ordered m10 1.25

Cheers

Post by **Punx0r** » Sun Dec 31, 2006 2:11 pm

Just search on google for M10 tap size, should bring up a few tables with loads of values for different thread sizes

fluke · Post by **fluke** » Sun Dec 31, 2006 4:05 pm

Its also on here somewhere Steb put up a list I believe.

t16omcat · Post by **t16omcat** » Sun Dec 31, 2006 5:48 pm

k & t series rover engines have m10x1.50 threads on the exhaust manifold (standard coarse pitch)

helicoil tap drill size would be 10.40mm or 13/32" iirc

hth.

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 5:50 pm

Thanks what tap size should i use for the helicoil?

M12?

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 5:51 pm

these are the ones ive bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1

t16omcat · Post by **t16omcat** » Sun Dec 31, 2006 5:52 pm

tap is a special size to suit the insert, it should come with the kit.

edit you have just bought inserts.
do a search for the tap spec

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 5:52 pm

Not a kit just the coils

ade · Post by **ade** » Sun Dec 31, 2006 5:56 pm

For a more permanent repair, Timeserts are much better, but a lot more expensive. Used to repair rocker cover threads on BMW motorcycles with Timeserts and never had any probs with them, which is more than I could say for helicoils (at least for that application).

Ade

brad · Post by **brad** » Sun Dec 31, 2006 6:33 pm

bloody hell they a bit exspensive at work we get the kits for about Â£15 and it comes in nice metal case with tap and drill bit in there too

Steve220 · Post by **Steve220** » Sun Dec 31, 2006 6:45 pm

martyn-420t wrote:Not a kit just the coils

you not got the applicator too??

ryan_220 · Post by **ryan_220** » Sun Dec 31, 2006 7:30 pm

To use helicoils you need the right tap that is normaly always a funny size and the HSS twist drill bit that is also a funny size bear that in mind

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 7:30 pm

Narr just the coils. can make a applicator.

martyn-420t · Post by **martyn-420t** » Sun Dec 31, 2006 9:51 pm

Just bought http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1

So the job starts next sunday.

steb9780 · Post by **steb9780** » Mon Jan 01, 2007 11:46 am

Yep you're always best to buy a kit. At least you know the break-off tool is going to be right. Also if you were to buy all the bits separate it would probably end up costing more that the kit would.

The taps are funny sizes usually they are an "insert" size.

It's the tap and the drill that are the expensive bit of a kit. The helicoils themselves cost pennies each.

t16omcat · Post by **t16omcat** » Mon Jan 01, 2007 12:55 pm

martyn-420t wrote:Just bought http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1

So the job starts next sunday.

what engine are you helicoiling?
that kit is a m10x1.25 fine pitch.

m10x1.50 standard pitch is needed if you are working on a K or T series.

hth.

steb9780 · Post by **steb9780** » Mon Jan 01, 2007 1:20 pm

Could get around it by getting 1.25 pitch studs and nuts etc.

martyn-420t · Post by **martyn-420t** » Mon Jan 01, 2007 3:59 pm

Using it on the t series manifold to head studs.

Used search on here to find the right size.