helicoil problem help please!!!

Hey all, I am having a nightmare with 2 helicoils on my exhaust/intake manifold.The hole have been helicoiled before and the tap does not seem to be cutting a deep enough thread. Needless to say the helicoil is pulling out. I can not get enough tourqe to get the gasket to seal. I am wondering if I can go to a larger helicoil but I am concerned about the water jacket, especially the rear one. I gotta think this has happened before, but I am not finding any threads that address this issue.I am in hopes someone may be able to give me som other ideas. Thanks Dave

 

There is a product called time-sert give thema try they will work better in your application.Y ou can get them through Mcmastercarr, MSC

 

I know them as 'Keen-sert"
same item ???

 

Nope a Keen-sert is a bit different but they may work good for what he doing.

 

okay
got it
thanks

 

I will look into these more.I really appreciate the responses. gotta get her back together quick. gonna be snowing and no plow Uht oh.

 

Wow, there a lot to choose from. I am kinda confused on which I should go with.any suggestions on how I should figure that out?

 

If it were me and helicoils aren't working i would use these:


We use these all the time at work, they work great!!

 

if the helicoil was set past the back thickness of the casting, would this cause failure?

 

Are you breaking the tang out after the heli-coil is inserted?

 

yes I am but I probably should not insert to the point that it hangs out the back side right?

 

Definitely No!

 

the casting is not on the greatest of shape on the milled surface.That may also be causing the pulling out issue.I guess it is one more reason for a ridgid type insert.I am not sure if there is enough threads to hold due to the hole on the face.