Smog pump delete help.
#1
Smog pump delete help.
So I have an 89 with a 305 TBI and want to delete the smog pump. Was wondering what size bolt I could use to plug the holes in the exhaust manifold. I was reading that you can weld them shut but I do not have a welder. Thanks in advance
#5
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Re: Smog pump delete help.
They're hard to find these days but they can still be found on ebay or fastenal for a decent price.
Edit: Here you go: https://www.ebay.ca/itm/Inverted-Flare-Fittings-Steel-Fitting-Plug-5-16-Tube-/232322680575?var&hash=item0&_uhb=1
#7
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Re: Smog pump delete help.
Eh I just used brass plugs NPT plugs and they worked fine for the year or so before I pulled all that junk off and installed Dyno Don headers.
At $28 for 10 of those inverted flare fittings I think I would live with some leakage. Which honestly if you gorilla those soft brass NPT plugs in there they will conform and they aint going to leak.
Sure it's not "right" but then neither is deleting the AIR system and the RIGHT way to do this is with some proper headers.
GD
At $28 for 10 of those inverted flare fittings I think I would live with some leakage. Which honestly if you gorilla those soft brass NPT plugs in there they will conform and they aint going to leak.
Sure it's not "right" but then neither is deleting the AIR system and the RIGHT way to do this is with some proper headers.
GD
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#8
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Car: 1991 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42 Auburn
Re: Smog pump delete help.
Now I did not do this...a PO of my car did, My pipes are cut right at the nut and the hole is filled with Epoxy. I am to assume they could not break the nuts loose. I would rather have the plugs that can be bought but I have had the car for over 3 yrs and it has not blown out nor does it look horrible as it is a clean cut with no pipe sticking out. This is not the proper route to go but if you can't get those nuts loose I guess this does work.
#10
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Car: '83 Firebird (T/A Clone)
Engine: 350 carbed with L-69 components
Transmission: 700R-4 w/2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 Let's Go Brandon
Re: Smog pump delete help.
This is what I did. It's a stainless steel compression fitting and cap for 1/2" tubing.
I put the original clamp back on after the pic was taken.
I put the original clamp back on after the pic was taken.
#11
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Car: '83 Firebird (T/A Clone)
Engine: 350 carbed with L-69 components
Transmission: 700R-4 w/2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 Let's Go Brandon
Re: Smog pump delete help.
By the way, regardless of what you use to plug the manifolds, those fittings ARE NOT NPT. They are 1/2"-20 straight thread (bolt thread)...
#12
Re: Smog pump delete help.
#13
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Re: Smog pump delete help.
Does not matter. Brass is soft enough that it seals up just fine. And who is going to put the tubes back on? No one. So if the threads get buggered it doesn't matter. This just a short term solution before they get ripped out and headers get installed.
#14
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Car: '83 Firebird (T/A Clone)
Engine: 350 carbed with L-69 components
Transmission: 700R-4 w/2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 Let's Go Brandon
Re: Smog pump delete help.
I don't plan to put headers on this car, and while I hope I never have to re-install the AIR tubes, it can be done...
#15
Re: Smog pump delete help.
I was removing my smog pump and ran into a problem! Got the pulley off, got the top torx 40 bolt out but the bottom bolt torx stripped.
at work I have a torx 40 plus which is bigger and the snap on guy will be there. Any ideas?
at work I have a torx 40 plus which is bigger and the snap on guy will be there. Any ideas?
#16
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Car: 1989 Firebird Fornula 350
Engine: 350 L98 / NOS
Transmission: 4sp Auto
Re: Smog pump delete help.
Did this on may 1983 T/A and the thread size was M13 x 1.5. As I had a NOS air pipe to measure the threads. I used these:
https://www.ebay.com/itm/M17-Kit-Rep...72.m2749.l2649
https://www.ebay.com/itm/M17-Kit-Rep...72.m2749.l2649
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