Paging shoebox,nighttrain66, or head expert...
01-28-2003, 07:29 PM
#1
Registered User
Thread Starter
Join Date: Mar 2002
Location: Vicenza, Italy
Posts: 279
Paging shoebox,nighttrain66, or head expert...
I discovered that the banjo bolt hole on the head is ROTTED/CORRODED. I had a board member put the heads back on, intake back on, rocker arms, etc. etc. etc. etc. etc.
NOW, he said I have 2 choices:
Pay $100 for new gaskets and ahve the motor torn apart AGAIN OR
Find a helicoil insert/time sert for the banjo bolt.
GM ****ed up royally by making 18 threads on a 1/2" bolt, which USUALLY has 20tpi on it.
So now what can I do. I don't want to go to every machine shop in town KNOWING that they don't have this helicoil/time sert that fits that banjo bolt.
Another guy at a machine shop said that I coulld weld the hole shut on the head, buy a tap drill, buy a custom tap (1/2" bolt, 18tpi) and drill a new hole in the head, and then put the bolt back in without a helicoil. (as I won't need it anyway in that case)
The problem with this method is that I don't think the dealer has a portable welder on hand to weld the hole shut with the heads on the vehicle, which clearly means Imy only option is to spend $100 I don't have and buy new gaskets.
Do I have ANY other options?
NOW, he said I have 2 choices:
Pay $100 for new gaskets and ahve the motor torn apart AGAIN OR
Find a helicoil insert/time sert for the banjo bolt.
GM ****ed up royally by making 18 threads on a 1/2" bolt, which USUALLY has 20tpi on it.
So now what can I do. I don't want to go to every machine shop in town KNOWING that they don't have this helicoil/time sert that fits that banjo bolt.
Another guy at a machine shop said that I coulld weld the hole shut on the head, buy a tap drill, buy a custom tap (1/2" bolt, 18tpi) and drill a new hole in the head, and then put the bolt back in without a helicoil. (as I won't need it anyway in that case)
The problem with this method is that I don't think the dealer has a portable welder on hand to weld the hole shut with the heads on the vehicle, which clearly means Imy only option is to spend $100 I don't have and buy new gaskets.
Do I have ANY other options?
01-28-2003, 07:53 PM
#2
Banned
Join Date: Aug 2001
Location: looking for a flow bench so Brook and I can race
Posts: 3,505
Re: Paging shoebox,nighttrain66, or head expert...
Originally posted by Trans AM 22502
I discovered that the banjo bolt hole on the head is ROTTED/CORRODED. I had a board member put the heads back on, intake back on, rocker arms, etc. etc. etc. etc. etc.
NOW, he said I have 2 choices:
Pay $100 for new gaskets and ahve the motor torn apart AGAIN OR
Find a helicoil insert/time sert for the banjo bolt.
GM ****ed up royally by making 18 threads on a 1/2" bolt, which USUALLY has 20tpi on it.
So now what can I do. I don't want to go to every machine shop in town KNOWING that they don't have this helicoil/time sert that fits that banjo bolt.
Another guy at a machine shop said that I coulld weld the hole shut on the head, buy a tap drill, buy a custom tap (1/2" bolt, 18tpi) and drill a new hole in the head, and then put the bolt back in without a helicoil. (as I won't need it anyway in that case)
The problem with this method is that I don't think the dealer has a portable welder on hand to weld the hole shut with the heads on the vehicle, which clearly means Imy only option is to spend $100 I don't have and buy new gaskets.
Do I have ANY other options?
I discovered that the banjo bolt hole on the head is ROTTED/CORRODED. I had a board member put the heads back on, intake back on, rocker arms, etc. etc. etc. etc. etc.
NOW, he said I have 2 choices:
Pay $100 for new gaskets and ahve the motor torn apart AGAIN OR
Find a helicoil insert/time sert for the banjo bolt.
GM ****ed up royally by making 18 threads on a 1/2" bolt, which USUALLY has 20tpi on it.
So now what can I do. I don't want to go to every machine shop in town KNOWING that they don't have this helicoil/time sert that fits that banjo bolt.
Another guy at a machine shop said that I coulld weld the hole shut on the head, buy a tap drill, buy a custom tap (1/2" bolt, 18tpi) and drill a new hole in the head, and then put the bolt back in without a helicoil. (as I won't need it anyway in that case)
The problem with this method is that I don't think the dealer has a portable welder on hand to weld the hole shut with the heads on the vehicle, which clearly means Imy only option is to spend $100 I don't have and buy new gaskets.
Do I have ANY other options?
01-28-2003, 09:52 PM
#5
Registered User
Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,714
Never heard of anyone with this kind of problem before. If you cannot find a heli coil or time sert, maybe there is some kind of adapter fitting that could be used. It will probably be a difficult search to find what you need. Pulling the head, welding and retapping is a solution and may ultimately be the easiest in the long run.
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