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08-12-2012, 01:41 PM
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#1 |
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Dino burner
Join Date: Nov 2002
Location: Calgary, Alberta, Canada
Posts: 602
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Re: What kind of plugs for exhaust manifolds?
The A.I.R. tubes are a straight thread because the tube's sealing is accomplished via the 45-degree mating surfaces of the tube to the "cone" inside of the exhaust manifold.
If you can find a straight thread plug, go for it, but when I had trouble finding one, I just used a brass NPT (national pipe taper) plug. The brass is soft enough that as you tighten it, it will deform to the threads in the exhaust manifold and will seal without the need of any threadlocker, or paste, etc. Since I knew I'd never be removing the plugs once installed, it didn't bother me that I forced the NPT plug into the straight thread manifold. |
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08-12-2012, 04:04 PM
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#2 |
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Registered User
Join Date: Jul 2008
Location: Show low,az
Posts: 808
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Re: What kind of plugs for exhaust manifolds?
Sounds good! Heading to the store now. As Of last nite I was just gonna weld the nuts from the A.I.R tubes shut, but I just found out my tank for my welder is empty and my welding shop is closed today (Sunday)..
__________________
1978 C10 Silverado Big 10 350/350.. play toy 1990 V1500 Suburban 350/700r4..Daily driver 1987 K10 Silverado 383/400.. Wife's rig WRECKED! 1989 V2500 Suburban 350/400.. SOLD! 1974 C10 Custom10 LWB 350/350.. SOLD! 1974 C10 Custom10 SWB 350/400.. SOLD! 1999 Silverado Z71 LS1.. Wife's rig WRECKED! On the hunt for a new project....... I'm a Chevy guy.....I'm just not a "NEW" Chevy guy. |
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