[RICK LAKE]

Mick mate I have used helicoils over the years. On some repairs helicoils work great. I think they work best on steel or iron stripped holes. The first 3-4 threads do all the holding of a bolt. With Aluminium and GM we have gone to timeserts. The 2 master kits are almost $1,000.00 dollars. The kits can fix every hole in LS2 and Northstar motors. I would think that there is a reason for GM to use timecerts and not helicoils. I have had to repair the 8 wholes on my shelby heads because of helicoils not holding to the aluminium. I now have 8 timeserts with special studs that are 3/8 into the serts and 5/16" shaft through the rocker assemblies. Helicoils IMO are good for low torque applications. I think under high torque requirements that helicoils wiggle loose in the hole, ( aluminium ) and back out. They where installed properly and given 24 hours to dry. Helicoils are good for a quick repair but, I will stay with a solid metal tube with threads when there is room to install IMO . Rick L.