THSCC Forums

No doubt. Helicoils are frequently stronger than the original threading. The only issue with helicoils is somtimes they come out or thread farther into the hole. For this reason, I put blue loctite on the helicoil itself and don't put a fastener into that hole until it's dry. Timeserts seem to be better in this respect but are a lot more expensive.

Did you do two back to back? I've never heard of that, seems that the tang of the one closer to the exterior would have to match perfectly with the top of the inner one.

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2011/2012 Autox VP
2013/2014.5 President
2013 Top Gun

2015 Fit

22R-EC => 4G63 => D16Y7 + D16Y8 => EJ255 + K24Z2 => K20Z3 + K24Z2 => K24Z2 + M54 => L15B

The "tang match" does seem to be an issue at first, but the tap cuts the threads in the parent part continuously, so that no matter how the coil is inserted, it still follows the parent threads, so there can be gaps between the coils with no ill effects.
Charlie G

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1998 BMW Z3
1987 BMW 325is
2000 BMW
1996 F250 Turbo Diesel

HA! Duh, sorry Charlie. Makes sense now .

_________________
2011/2012 Autox VP
2013/2014.5 President
2013 Top Gun

2015 Fit

22R-EC => 4G63 => D16Y7 + D16Y8 => EJ255 + K24Z2 => K20Z3 + K24Z2 => K24Z2 + M54 => L15B

this is what you were looking for i'm guessing? not all that expensive at all and they work wonderfully. you do have to be extra careful when using small taps because its extremely easy to brake the tap in half and then the real fun starts.

http://buy1.snapon.com/catalog/item.asp ... ir=catalog

on another note i have a hard time trusting a helicoil with much of anything i conciser to be critical or has stress exerted on it. i've used tiemserts on several projects and have been amazed every time they are without a doubt the only PERMANENT FIX if you dont want to worry about threads stripping or pulling out ever again.

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#77 nasa spec 3
e36 M3

Timeserts are nice for things that you repeatedly unfasten (ie Brembos on STIs where the bolts go through the knuckle and thread into the soft aluminum caliper that obviously heat cycles constantly).

For stuff like Michael's repair, which he'll rarely if ever remove, a helicoil is quite sufficient. Numerous tensile tests have the fastener breaking before the threads break with a helicoil. Without a helicoil, the same test would have the fastener tearing the threads out (the female threads were in aluminum in this test). My only qualm with helicoils is if they back out or go farther into the hole when you try to remove the fastener and then reinsert it. That's why I loctite the helicoil into the new threads and let it dry before tightening the bolt in.

_________________
2011/2012 Autox VP
2013/2014.5 President
2013 Top Gun

2015 Fit

22R-EC => 4G63 => D16Y7 + D16Y8 => EJ255 + K24Z2 => K20Z3 + K24Z2 => K24Z2 + M54 => L15B

OK, so you made me look for "TIME-SERT " thread repair, and they are different from the various thread inserts that I have used over time. They were even interesting enough to cause me to look for a local reseller (to no avail). So where do you buy these?

The primary down side to most other thread repair inserts is the outside diameter can be quite a bit larger than the original thread OD and that can get into wall thickness problems in the parent material.
Charlie G

_________________
1998 BMW Z3
1987 BMW 325is
2000 BMW
1996 F250 Turbo Diesel