LT4 Head insert question
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Thanks, I'll have to get a good pair of needle nose at work. Mine are just too big.
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
get a smaller diameter bolt, put it against the tang, give it a quick tap with a hammer and itll break off.
Use compressed air to get it out of the hole. Make sure you catch it or cover up any other openings to the motor if you go this route. You can also put grease on the end of the smaller diameter bolt and hope it sticks to it.
Use compressed air to get it out of the hole. Make sure you catch it or cover up any other openings to the motor if you go this route. You can also put grease on the end of the smaller diameter bolt and hope it sticks to it.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
It seems the GM inserts don't have the notch so it will break off easily. I had to use a ground down screw driver to bend the tang back and forth until it broke off. Driving a punch down onto the tang didn't work either as it just bent the tang down to the bottom of the hole before it would break off. I've got three tangs off and only 13 to go. At least there is a light at the end of the tunnel. BTW, the ARP studs fit properly with the tangs removed. 
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
did GM helicoil them from the factory? Or did a previous owner do it to streghten the threads? Aluminum can only be torqued so many times before the studs start to wear...when I take my heads off the winter I will be helicoiling all of the threads where the intake bolts to...the accessory bolts should be just fine.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
did GM helicoil them from the factory? Or did a previous owner do it to streghten the threads? Aluminum can only be torqued so many times before the studs start to wear...when I take my heads off the winter I will be helicoiling all of the threads where the intake bolts to...the accessory bolts should be just fine.
BTW, I got all the tangs out and the studs fit correctly. Problem solved.
