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03-14-2005, 11:12 AM
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#1 |
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Registered User
Join Date: Mar 2005
Posts: 5
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Emissions stuff on '72
New guy here; 'mornin everyone. We're up to our thingie-dos in snow here in New Hampshire. Wish I had a heated garage. I have a '72 half-ton with 250 ci I6, 3-speed manual. There is no air pump, & there are no air injector bungs on the exhaust manifold. The shop manual shows all this stuff. Do I have a mongrel, or were there California & non-California versions of this year truck?
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03-14-2005, 11:15 AM
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#2 |
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Account Suspended
Join Date: Jan 2003
Location: Shadow of Lambeau Field
Posts: 5,597
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Welcome to the board! Yup, it's a Cali thing... you don't need to understand
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03-14-2005, 11:35 AM
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#3 |
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Resident Curmudgeon
 
Join Date: Dec 1999
Location: NH
Posts: 6,664
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where are you at in NH?
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Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter  Maybe I need to sell some of this crap  Yet another Bozo with a sawz-all |
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03-14-2005, 02:15 PM
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#4 |
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Registered User
Join Date: Mar 2005
Posts: 5
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Nottingham
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03-14-2005, 02:31 PM
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#5 |
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Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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I have a 71 originally sold in cali and it did not have the air pump or
air injectors from the factory. Was this something that started in 72?
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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03-14-2005, 08:12 PM
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#6 |
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Account Suspended
Join Date: Jan 2003
Location: Shadow of Lambeau Field
Posts: 5,597
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Farside, I don't know for sure, but I have a 72 cab that originally came from Cali, and it states "Calif. Emissions" on the glove box door decal.
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03-14-2005, 09:36 PM
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#7 |
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Franko72
Join Date: May 2004
Location: Cincinnati,Ohio
Posts: 471
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welcome from Cincy
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 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust |
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03-15-2005, 01:58 AM
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#8 |
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Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Huh, I wonder..... I had a 73 a few years back and it did have that smog
pump hooked up to factory headers. Interesting. I bet it started in 72
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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03-15-2005, 09:17 AM
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#9 |
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Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,286
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From what I can tell, smog pumps first starter appearing in 68. According to what I've seen in my resto pack they were for 1/2 ton - manual transmissioin trucks only. I don't think they were for California trucks only at least at first. It looks like automatic trucks usually had the heat riser set up.
My truck has a smog pump and it has no special California option. I think it's a native ND truck. I've seen a few other 68's with smog pumps. These rules may have changed by 72.
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Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club. Last edited by toms68cst; 03-15-2005 at 09:20 AM. |
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