Author Topic: Emission controls question for you California folks  (Read 4192 times)

Offline zieg85

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Emission controls question for you California folks
« on: February 21, 2015, 01:59:33 PM »
Here is the deal...  My A.I.R. tube on my 1984 C10 with a 4.1L  I-6 is in need of replacement.  What do you folks in California do when they are no longer available and you can not find a good used ones?  I am facing a rebuild and this one will not come out without crumbling to pieces.
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline Shifty

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Re: Emission controls question for you California folks
« Reply #1 on: February 21, 2015, 02:03:49 PM »
Can you fab one?  I don't know the layout of the 6 cylinder ones, but you could probably make one fairly easily...
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

Offline zieg85

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Re: Emission controls question for you California folks
« Reply #2 on: February 21, 2015, 02:07:46 PM »
Can you fab one?  I don't know the layout of the 6 cylinder ones, but you could probably make one fairly easily...

It is nothing like the V-8 ones.  It would have to be near perfect for the air cleaner housing to go back on it.  This was the last year for the 4.1L and this configuration was not made that long, 1979 I know is different
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Shifty

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Re: Emission controls question for you California folks
« Reply #3 on: February 21, 2015, 03:25:26 PM »
Any chance of posting a pic?
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

Offline Irish_Alley

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Re: Emission controls question for you California folks
« Reply #4 on: February 21, 2015, 03:26:04 PM »
i was getting ready to say i have one but its on my 79 4.1. didnt know theyre diffrent
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Offline zieg85

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Re: Emission controls question for you California folks
« Reply #5 on: February 21, 2015, 03:43:36 PM »
Any chance of posting a pic?

Here are a few pictures
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Shifty

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Re: Emission controls question for you California folks
« Reply #6 on: February 21, 2015, 03:57:06 PM »
How's you welding skillz?  You could use the more readily available v8 air tubes, and weld them up.
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

Offline zieg85

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Re: Emission controls question for you California folks
« Reply #7 on: February 21, 2015, 04:00:24 PM »
How's you welding skillz?  You could use the more readily available v8 air tubes, and weld them up.

zilch, the 2nd picture is where I had to put a 2K epoxy to seal a leak and one of the rear is frozen up.  I soaked for 2 days and it still wants to twist.  Anyone have a 84 book that gives a part # for this?
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline LTZ C20

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Re: Emission controls question for you California folks
« Reply #8 on: February 21, 2015, 07:16:20 PM »
I'm guessing you already checked the junk yards and pull aparts?
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Offline VileZambonie

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Re: Emission controls question for you California folks
« Reply #9 on: February 21, 2015, 07:32:12 PM »
Use copper tubing
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Offline roundhouse

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Re: Emission controls question for you California folks
« Reply #10 on: February 21, 2015, 07:33:47 PM »
Is metal brake line the same size ?


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Offline zieg85

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Re: Emission controls question for you California folks
« Reply #11 on: February 22, 2015, 08:04:21 PM »
I have put out a WTB post and now know that it is GM part#14077292 that I need.  Thanks for the suggestions, I may be forced to fabricate one since they are no longer available but I will cross that bridge when I have too.
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Shifty

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Re: Emission controls question for you California folks
« Reply #12 on: February 23, 2015, 12:15:25 PM »
Is metal brake line the same size ?


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No, the fittings at the manifold are unique to A.I.R. tubes...

I would look for some v8 ones, since they are way more common, and join them with compression fittings if you have to, though brazing would be much cleaner. 
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

Offline roundhouse

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Re: Emission controls question for you California folks
« Reply #13 on: February 23, 2015, 09:39:48 PM »
All you need Is for it to look like it works to pass the visual inspection.



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Offline zieg85

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Re: Emission controls question for you California folks
« Reply #14 on: February 23, 2015, 10:21:40 PM »
All you need Is for it to look like it works to pass the visual inspection.



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Here in Indiana they don't even open the hood.  What counts is the tailpipe emissions run on a dyno treadmill of sorts.  They inspect the exhaust system, check the gas cap to see it holds pressure and make sure it has a catalytic converter. 
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/