problem is when you pull a heli-coil out it usually takes the repair threads that hold the coil in play out with it. been there done that seen that. that is why the time certs are so much better. they are used to repair bores in engine blocks that hold heal bolts in that are torqued down really tight and they stan the test of time they are a permanent repair. they kits are really not all that expensive for the DIY person. and the repair process is essentially the same in you just drilling a bigger hole and metal bullet instead of threading in kite string
Spark Plug Thread Repair Kit Suggestions?
- Thread starter l008com
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It is not the inserts I have the problem with its the tool the cheap kits that tries to ream to hole and thread it at the same time.
Now regular Time-serts even use a very similar threading tool. I waiting on a 9/16 3/8 Reduced shank drill bit so I cut out the old threads so can I try the above tool as a regular tap. Another difference is that Time-serts comes two styles. Gasket and taper seat designs where the kit I brought tries to do both with the same insert just swaggering the insert [Helical Inserts]. Plus Time-serts are also countersunked [no swaggering needed].
So basically we are discussing three different systems. True Helical coils, Helical coil inserts, and Time-serts.
Now regular Time-serts even use a very similar threading tool. I waiting on a 9/16 3/8 Reduced shank drill bit so I cut out the old threads so can I try the above tool as a regular tap. Another difference is that Time-serts comes two styles. Gasket and taper seat designs where the kit I brought tries to do both with the same insert just swaggering the insert [Helical Inserts]. Plus Time-serts are also countersunked [no swaggering needed].
So basically we are discussing three different systems. True Helical coils, Helical coil inserts, and Time-serts.
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yes for sure and in terms of longevity you have them from the least desirable to most desirable and the price has dropped when Time-serts first came out the price was astronomical and with ali-express and temu even time sert knocks offs are still better than a heli-coil. if it's just a cylinder head and it was mine I would just replace the head and be down with it if cheap enough to replace.
golfergordy
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here's the threading tool I used. It worked, but wasn't easy. There were 4 inserts, one of which I ruined, and the other is in my snowblower head.