T500 - Thread Repair Question

Frank · Post by **Frank** » Wed Dec 30, 2009 3:32 pm

I pulled the heads and cylinders from a parts engine. Several of the smaller (8mm?) holes for the studs that hold down the head are bunged-up. Does anyone know if this is a common problem? I suspect they can be heli-coiled but am not sure if it's worth it or not (I have another parts engine I can use.)

Advice, opinions, etc. appreciated as usual.

Zook-e · Post by **Zook-e** » Wed Dec 30, 2009 5:59 pm

Yes it is common. I would time-sert them instead of helicoil. Helicoils I am not very fond of.

Frank · Post by **Frank** » Wed Dec 30, 2009 10:23 pm

I've never used them, are they hard to use? Where does one get them?

TLRam1 · Post by **TLRam1** » Thu Dec 31, 2009 3:08 am

Here they are, not sure of the best place to purchase.

http://www.timesert.com/

Frank · Post by **Frank** » Thu Dec 31, 2009 6:57 am

I like these - there's not much room between some of the holes and the edge of the cylinder but this type of repair insert looks like it was custom made for that type of application. Very cool. (Thanks Eric for the info.)

gyrocfi · Post by **gyrocfi** » Thu Dec 31, 2009 1:00 pm

Bill bunn also repairs striped threads in cyclinders. They get the coils in straight and will also weld up badly damaged holes, drill, and tap.