LS1 block thread repair - with Time Sert kit
The original bolt that I removed was only threaded ½ of the length of the bolt. The replacement GM bolt (shown in the first picture) was threaded all the way. I then purchased a Fel Pro bolt set from OReilly to replace the GM set that I had already torqued (i.e. when the threads failed). The Fel Pro set also was threaded all the way. I'm not sure when the bolt supplier changed the design, but it seems to be universal to be threaded all the way now. Note - this only applies to the two short M11 bolts, not the 8 long M11 bolts.
Teching In
Joined: Sep 2014
Posts: 5
Likes: 0
From: Kenosha, WI
I had an issue with the coolant filled bolt hole being cracked I had an issue with the outer rear most head bolt being cracked from my donner car. So I did what any one would do. I welded the crack and used the serti-thread kit. It worked awsome!
As far as the flare at the end, that's what makes the time-sert so dope. Locks that son of a beyotch in place. I favor helicoils for low torque everyday fixes or open ended holes/soft metals, and time-serts for higher torque stuff.
