smog removal
Thread Starter
Racer
Joined: Oct 2005
Posts: 324
Likes: 0
From: Vancouver BC
smog removal
removing all the smog stuff off the '72 I just bought. got the pump off, am having trouble getting the nuts off the manifolds, as they are almost "rounding off" as i try to loosen them. any ideas? i would prefer not to cut the tubes so that I have them for when i eventually sell it.
Safety Car
Joined: Sep 1999
Posts: 4,930
Likes: 11
From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by driver68
removing all the smog stuff off the '72 I just bought. got the pump off, am having trouble getting the nuts off the manifolds, as they are almost "rounding off" as i try to loosen them. any ideas? i would prefer not to cut the tubes so that I have them for when i eventually sell it.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
This is a little off topic but something I remembered from back in my smog removal attempt days. I had problems removing the bolts that were used to plug the holes for the smog tubes. Naturally the threads got boogered and I wanted to tap them to straighten them out. I found that they were not NPT threads but SPT. NPT threads are tapered pipe threads whereas SPT are straight pipe threads of the type you see on lamps. It took a while to find the appropriate tap but I eventually got the threads straightened out and plugged. After that I ran the stock manifolds until I had other problems with them and then replaced them with pre-smog rams horns. Later I ditched all that for a set of headers and haven't looked back since. Just a little trivia for ya. 
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Safety Car
Joined: Sep 1999
Posts: 4,930
Likes: 11
From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by vettfixr
This is a little off topic but something I remembered from back in my smog removal attempt days. I had problems removing the bolts that were used to plug the holes for the smog tubes. Naturally the threads got boogered and I wanted to tap them to straighten them out. I found that they were not NPT threads but SPT. NPT threads are tapered pipe threads whereas SPT are straight pipe threads of the type you see on lamps. It took a while to find the appropriate tap but I eventually got the threads straightened out and plugged. After that I ran the stock manifolds until I had other problems with them and then replaced them with pre-smog rams horns. Later I ditched all that for a set of headers and haven't looked back since. Just a little trivia for ya.
