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Re: [T3] pop-out


On 19 Jul 99, at 0:11, Sonny8oy@aol.com wrote:

> driving along today around town, all of a sudden the car goes pop, and sounds 
> loud and rough.
> turns out it blew #4 spark plug out of the head. this is a plug that had a 
> threaded insert on it. 

I dislike the solid inserts because they come out with the plugs and 
cause the threads to wear a bit more each time. The thread for the 
solid inserts is also a bit bigger than a Helicoil tap, so you can't 
go that direction. I don't see how the serrated threads on a solid 
insert can he
se the serrations must be below the diameter 
where the can dig into the head or you couldn't screw them in.

A CORRECTLY installed Helicoil is a permanent and excellent fix, but, 
as in many things, there are many ways to screw them up.

Jim
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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