And whats wrong with heli coils?

 

I think heli-coils are great given the right application. The problem with heli-coils in spark plug applications is that you don't have full heat transfer and it's not un-heard of for the heli-coil to come out with the plug in aluminum heads. Many manufacturers, such as GM, Honda, and Ford, recommend the Time-Sert to repair spark plug threads.

Just my 2 cents, YMMV, To Each His Own, and it's not my dog that's pooping in your yard.

Time-Sert vs. heli-coil:

 

Heres a link for the Timesert sparkplug repair........www.timesert.com/html/howtosp.html
This is a lot different than a std. thread insert.

Keep in mind that when doing any repair with a thread insert such as a Helicoil ,you can mess it up by not drilling a straight hole or by drilling an oversize hole.

 

Good to know. I''ve used them to repaire sparkplugs. Never had an issue. Bout how much for the kit tooling and all?

 

Another new thing learned.... I love it!

I am curious about removing plugs from a hot head though....why not? I am sure that this is obvious to many, but I could use some explanation.

Thanks!

 

Hot steel expands and holds heat longer than aluminum. Thus the plug is hot and expanded while the head is cooler and smaller.

 

I'm not arguing with you but as I stated if a person only buggrerd up the first two threads you can re tap and retain its strength. Now if all the threads are streached then yes re tapping wont cut it.

 

I am checking on time sert kits now The kit is 154.00, insert under 2.00 plus shipping

 

Soft 02: Thanks. Makes complete sense.

How's the weather down there? Been really nice in Salinas the last few days. I rode down to King City yesterday, then headed back up on Carmel Valley road. Was a great day. Whoops.....stold the thread....not my intention!

 

I guess that if you can get the tap to follow the damaged threads and not cut new ones it would get you back on the road. I really did have a buggered spark plug blow right out of my engine and dent the hood of my Citroen right after I had it painted.

My car, since sold.