Perry 951

I have the $90 helicoil set, $25 drill bit, $50 right angle drill adapter and large chuck, $15 stubby 1/4 socket wrench, and the $.99 roll of electrical tape needed to make it all work should someone need to helicoil in the future.

PM me if needed.

Dash01

Helicoil is not all that strong. Use Time-Sert or other solid device instead.

KuHL 951

I would never trust a Heli-Coil for a head stud but I'm sure someone here will say it works fine. The Heli-Coil is OK for low torque pull-out strength but a head bolt probably goes through more high load heat expansion/contraction cycles than any fastener on the car. I would go one size over with a reamer/retap and go oversize on that one stud. There are some very strong metal-based filled that are as strong or stronger than the aluminum. These can all be machined and tapped. We use a filler/repair compound made by Belzona at work but man is it expensive. Devcon and Bondo also make some similar products. I don't consider JB Weld in the same category.

Perry 951

According to Black and Decker's Elmhart Teknologies info department, the M12 1.5 helicoil can hold 255lb/ft of torque before stress loads stretch a properly installed coil. (properly installed means center drilled, tapped, and sealed with an anerobic sealant)

I know we are not near 255 ft/lbs on these studs, so it should work. If not, you'd still have enough material for a time sert or oversized stud.

xsboost90

you go boyee.