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#1 |
Registered User
Join Date: Jan 2004
Location: San Antonio, TEXAS
Posts: 253
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1st year for smog?
What was the first year for smog for these trucks?
I know it saw it somewhere on the board. I tried searching for it and could not find the thread. Thanks. |
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#2 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
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Many 68's were equipped with smog pumps. As far as I know no 67's were. I think only 1/2 tons were equipped not 3/4 ton's and above.
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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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#3 |
Registered User
Join Date: Jan 2004
Location: San Antonio, TEXAS
Posts: 253
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Thanks.
Do you know what years require smog pumps? Is this a state issue? |
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#4 |
Senior Member
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
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My 67 CA truck had all of the smog crap
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#5 |
14.1 @ 96MPH
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
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It's most certainly a state thing...my '70 has never had a smog pump or anything of the sort on it.
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#6 |
Young Gun wth Fast Inline
Join Date: Jan 2002
Location: Idaho
Posts: 1,475
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68 was first for PCV i thought. I didnt think there was any smog on 67 and lower
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1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!! |
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#7 |
ran out of money
Join Date: Apr 2003
Location: northern, NJ
Posts: 925
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i beleave pcv has been on engines since the mid 60's. the car co.'s didnt invent pcv for emissions. if i can remember correctly is was to prevent blow by and make the engines last longer since they wouldn't get gas into the oil and thin it out. if i am wrong someone please correct me. as for emissions i would guess it mattered what state it was in also. mine only had a charcoal canister.
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#8 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
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I agree it seems that CA trucks/cars had smog stuff earlier than the rest of the country.
I think around 70-71 they made the transitiion to heat risers rather than the smog pump set up. I've never seen on factory equipped with both in our series. I think 68 was the first year they were widly equipped nation wide with smog pumps.
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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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#9 |
Registered User
Join Date: Jan 2004
Location: Donie Texas
Posts: 44
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I can't tell you when it happened but I can say that 68 begins the year that you must have some sort of emmissions products. 67 and older may have an open element air cleaner where-as 68 and newer may not, at least for inspection purposes.
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#10 |
My son, my joy.
Join Date: Sep 2003
Location: Spokane WA
Posts: 463
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My 69 3/4 ton had no smog pump. Just a heat riser, which I removed when it broke.
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#11 |
Embrace the Redneck
Join Date: Jan 2004
Location: Cabot, AR
Posts: 1,334
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68 was first w/ PVC valve. Here in Missouri, they require that if it is equipped w/ the smog devices, it must have it. However if it was made before 83 or 4 you can take those divices off, but if the devices are still there they have to be in working order. after 83 they have to working period. I'm a MO state safety inspector #900023810. It is a state thing. Go to your local State Hwy patrol and ask for an inspection, free here in mo!
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'01 Camaro Son, you just can't get there from here... |
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#12 |
Embrace the Redneck
Join Date: Jan 2004
Location: Cabot, AR
Posts: 1,334
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Anything from CA will have it.
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'01 Camaro Son, you just can't get there from here... |
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#13 |
Registered User
Join Date: Aug 2002
Location: USA
Posts: 443
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I'm an engine novice. What kind of smog devices should I be looking for? Where do they connect? What do they look like?
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#14 |
Registered User
Join Date: Oct 2002
Location: West Des Moines, Ia
Posts: 3,233
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my 72 had it, never seen it on any other truck
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Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO |
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#15 |
AKA Phillip Johnson, AKA BANNED!
Join Date: Sep 2001
Location: Grants Pass, Oregon
Posts: 94
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only 1/2 ton calif trucks had smog. None of the 3/4 trucks had it.
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#16 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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My 70 owners manual showed a bunch about smog stuff...but I haven't seen my manual for a couple years now.
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#17 |
Registered User
Join Date: May 2002
Location: Gainesville, Georgia
Posts: 704
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My '69 built and sold in Atlanta had it, but it's not required in GA, so maybe it was slated to be shipped to CA?
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We made Oklahoma a little after 3, Randy & his brother Bob & my old GMC... |
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#18 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
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I don't know how It works but here's my smog pump. It's a belt driven pump with a bunch of plumbing to my exhaust manifolds.
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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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#19 | |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
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Quote:
Instead of smog pumps some 68's and later were equipped with the heat risers. I don't know of any other hard and fast rules.
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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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