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#1 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Do you have OEM CA emissions / smog equipment still in place?
Just curious who has CA emissions equipment still on their motor. I'm trying to reconstruct the missing system on my current Blazer build. My other blazer has its original equipment still intact.
Let's see some photos documenting the CA emissions systems.
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#2 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,373
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Re: Do you have OEM CA emissions / smog equipment still in place?
My truck has the Federal emissions package, so I can't take pictures to help you. However, if you need to see what was used, the Chassis Service Manual has pictures and schematic diagrams of the systems used, to help you. Someone here was gracious enough to scan in the entire manuals for a number of years; you should be able to find what you may need from those manuals.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#3 | |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Quote:
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#4 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Do you have OEM CA emissions / smog equipment still in place?
I can take more if you need them. I guess I should have called and let you look at it early that morning when I came back through Albuquerque.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#5 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Do you have OEM CA emissions / smog equipment still in place?
BTW, mine has what sounds like an exhaust leak. I had new exhaust installed, but the noise is still there. Do you have any ideas.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#6 | |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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![]() Quote:
It looks like the vacuum line from the (california/emissions) carb has been plugged (in your 1st pic) and I believe this normally runs to the emissions unit. Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#7 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Slowly coming together on the blue blazer.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#8 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
I've read the pump can seize over time and makes a racket but wouldn't suspect that would sound like an exhaust leak. If the diverter valve diaphragm fails it can produce a vacuum leak (read it can be cured by placing a BB in the signal hose to the valve) and continuously dump air into the exhaust manifolds that can cause back firing.
I found a guy who rebuilds divertor valves for the corvette crowd. Rock auto recently had a close out on some USA made reproduction diverter valves for like $10. These are plastic and the hose tubes oriented differently but I may use one until I can have the original unit rebuilt. Next time Larry! Thanks for the pics!
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#9 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Here's an AIR schematic for a small block - generic and not specific for a pickup though.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#10 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
I've been able to scrounge some NOS pieces to rebuild the system in my Blazer.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#11 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
....even a pump.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#12 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
The emissions decal for CA emissions half tons in 72 made use of this LM decal (not reproduced to my knowledge).
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#13 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Example pic of AIR brackets and AC brackets for SBC 1972
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#14 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,284
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Re: Do you have OEM CA emissions / smog equipment still in place?
I have a complete AIR System on my 68 if you need any more info/pictures. As I recall, at least in 68 only the standard transmission - half tons had AIR systems. There were probably different rules in later years.
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Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club. |
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#15 |
Registered User
![]() Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,210
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Re: Do you have OEM CA emissions / smog equipment still in place?
Guess I am lucky. My 3/4 ton 1970 had no emission controls, outside of the spark and fuel calibrations. Good luck getting it all together, so many people removed all that stuff years ago.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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#16 | |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Quote:
No 3/4t trucks had AIR - I believe these were emissions exempt.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#17 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Do you have OEM CA emissions / smog equipment still in place?
Here's the tag from my '72 California 3/4 ton 4x4 Suburban. I have no reason to suspect the fender well has been replaced. The engine has been replaced along with the exhaust. PO installed headers/aluminum intake. No AIR brackets left.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#18 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,004
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Re: Do you have OEM CA emissions / smog equipment still in place?
A suburban is not considered a commercial vehicle like a truck is here. It would make sense that it would have AIR vs. a truck.
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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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#19 |
Registered User
![]() Join Date: Dec 2015
Location: Holland Mi.
Posts: 302
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Re: Do you have OEM CA emissions / smog equipment still in place?
I bought a ‘70 C-20 in January of 1970. It was a 307cu in and 3 speed manual trans. Not sure where it was built but I bought in Wheaton Illinois. It had the air pump on it. Was pretty common in those days to just take the belt off the pump. I accidentally hooked a radiator hose to the pump during a valve job... left a white smoke screen behind it like I was running moonshine. You don’t forget that experience.
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#20 | ||
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Quote:
Quote:
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#21 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
I'm really curious about 68 actually because I've seen two half ton 4wd trucks both seemed to have AIR brackets but CA emissions not listed on the SPID. Did all standard tranny V8 trucks in 68 have AIR equipment?
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#22 | |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Do you have OEM CA emissions / smog equipment still in place?
Quote:
He traded it in on a new 69, 350 engine, 350 automatic, and it did not have an emissions system.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#23 | |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,284
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Re: Do you have OEM CA emissions / smog equipment still in place?
Quote:
3/4 ton trucks and heavier seem to have had fewer smog control requirements in 68.
__________________
Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club. |
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#24 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,370
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Re: Do you have OEM CA emissions / smog equipment still in place?
Looking good Pete!
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 ![]() |
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#25 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,372
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Re: Do you have OEM CA emissions / smog equipment still in place?
Thanks! Shoot me a text when possible - lost all my phone data
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__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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