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#1 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Hey, so I am new to the forum (going to be making my first intro in a day or so as I get my engine swap time lapse video done) BUT I would really appreciate on some guidance right now.
In the engine swap, we were going to keep the headers from the engine we were putting in, but since they didnt fit on my manual we kept my stock manifold. In taking the stock manifold off and putting it on, one of these plugs got missing, so now there is a gaping hole. I have come to understand it is called a SMOG plug? But I have no idea how to get a hold of one (to tell you the truck the other ones are so rusted I would probably need a set of new 4 plugs/bolts. I have been to autozone, advanced, oreilys, and other places (even called the chevy dealership). Where could I find one of these TAPERED bolts. I thought it was just a regulard plug, but it has a taper on it so I cant fit anything else in (like its gets smaller towards the end). ANY information would be so SO helpful, because my truck has an exhaust leak right now that I would love to fix. ![]() ![]() |
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#2 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,227
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Re: Hey, new here...would LOVE some help!!
I believe a regular pipe plug will thread right in there. Pickem up at any plumbing supply store.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#3 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,005
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Re: Hey, new here...would LOVE some help!!
You need a quarter inch pipe plug. They are available at lowe's, Home Depot, etc. An auto parts store will not carry them.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#4 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Re: Hey, new here...would LOVE some help!!
I got some plugs from autozone/ and window shopped at lowes but felt like I had already gotten the closest sized plug but when I threaded it in, it would only go about 1the in. I dont know if thats rust/something else buildup but yeah. And are brass plugs okay or??
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#5 | |
Registered User
Join Date: May 2011
Location: Northern Calif.
Posts: 3,684
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Re: Hey, new here...would LOVE some help!!
Quote:
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#6 |
Cluster King
![]() Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Re: Hey, new here...would LOVE some help!!
If your manifolds are from a 78 up, the threads are specific to that size. They are different than a normal pipe plug. I know they were available only from a dealer and were very hard to get.
I would. as others said, use a pipe tap and tap a pipe plug size in the hole. The photo is the actual emission tube that would have threaded into the holes in your manifold |
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#7 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,504
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Re: Hey, new here...would LOVE some help!!
Welcome to the board....after you get the plug fittings fixed, you will probably have another exhaust leak from a blown exhaust manifold gasket. Your mounting bolts will back out from heat to cool cycles. You could avoid this by getting the oem locking plates....also youll want to retorque the bolts after a couple start ups
Hope this helps
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#8 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Hey, new here...would LOVE some help!!
You will need a pipe tap to clean up the threads.
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#9 |
Registered User
Join Date: Oct 2012
Location: Lebanon Ohio
Posts: 187
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Re: Hey, new here...would LOVE some help!!
Shouldn't those plugs be metric if it came from a 78?
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1971 Chevrolet C10 Inflation Fighter ![]() 1994 C3500 Crew Cab Dually 454
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#10 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Re: Hey, new here...would LOVE some help!!
I have a 71 c10 so im assuming it wouldnt be metric. Im going to look for that tool at lowes then. Would I need anything else? One of my buddies said that I should just get a smaller bolt and jb weld it. And I just replaced the gaskets in the swap, would I need to again?
Thanks guys for all the help. Posted via Mobile Device |
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#11 |
Registered User
![]() Join Date: Jan 2012
Location: Phoenix, Arizona
Posts: 499
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Re: Hey, new here...would LOVE some help!!
If you have one out or can get one out you can have autozone or whomever see if it is a pipe thd or NPT(natioal pipe thread) and they could tell you if it is metric. like Gene said you will need a pipe tap to clean out the threads They refer to the threads as NPT so ask for that kind of tap Good luck and Nice ride
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#12 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,504
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Re: Hey, new here...would LOVE some help!!
No, the gaskets are fine, but if you dont fix the mounting bolts, the exhaust manifold will loosen up, causing an exhaust leak
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#13 |
Registered User
![]() Join Date: Dec 2012
Location: S/W Missouri
Posts: 121
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Re: Hey, new here...would LOVE some help!!
Welcome!! I found these on classic industries...smog tube eliminator plugs.
http://www.classicindustries.com/tru...ts/emp330.html
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1972 C10 CST LWB |
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#14 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Re: Hey, new here...would LOVE some help!!
In regards to the pipe tap, what size should I get, and how do i figure it out? Do I remove one of the exhaust plugs and get it sized?
Which would be better? Doing the pipe tap thing so it secures the plugs that I can buy or order some? I am not really sure about sizes though. If I buy the tap (which looks like a drill tip) do I need an additional tool? [AND THANKS AGAIN FOR ALL THE HELP] |
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#15 |
Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: Hey, new here...would LOVE some help!!
to use a tap you generally need a drillbit of a specific size marked on the side of the tap. The tap obviously needs to be bigger than the hole you already have.
drill out the hole (very straight). then use the tap attached to the tap tool to spin it. the tap DOESNT go in a drill. All that said. I would just buy the new plugs that fit it. Or actually if its not a show car I would just buy whatever will fit and crank that beatch down!! but thats just me. |
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#16 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Re: Hey, new here...would LOVE some help!!
ALSO! Do I need to remove the manifold to do this, or can i just get a pipe tap and use a hand tool on it while its still attached to the truck? like then just plug it up with a plug
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#17 |
Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: Hey, new here...would LOVE some help!!
you can probably do it on the truck but im not sure if your drill will fit to predrill the hole before tapping.
also you need to drill very straight obviously and that might be hard standing on your head under the hood. |
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#18 |
Registered User
![]() Join Date: Dec 2012
Location: S/W Missouri
Posts: 121
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Re: Hey, new here...would LOVE some help!!
If it were me, I would just order new ones and not have to mess with tap or try to find some at a junkyard.
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1972 C10 CST LWB |
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#19 |
Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: Hey, new here...would LOVE some help!!
x2 i hate taps and dies. My straightometer is always off.
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#20 |
Registered User
Join Date: Jan 2013
Location: Dallas, TX
Posts: 15
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Re: Hey, new here...would LOVE some help!!
Yeah, I think I am going to order some of the new ones, but I still am worried, because when I look at the picture in this link.
http://www.classicindustries.com/tru...ts/emp330.html it doesnt seem to have a big taper like i know the bolts i need have. So thats what worries me. do you guys think it would fit? |
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Tags |
bolt, exhaust, manifold, pipe plug, plug |
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