454 engine smog/air pump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

UH8UsWeH8U2 · 03-12-2016, 09:16 AM

I have a 84 chevy silverado c20. 454 engine. Im having issues with smog pump. Ordered one from ebay but not sure if I got all the necessary parts.
Can anyone tell me where I can find a picture or diagram of the engine and smog pump?? If anyone has a repair manual for the 84 silverado can you maybe take a picture of the engine and smog pump repair pages from the book and send them to me please??
My truck passed emissions but they won't pass me until I get a Smog pump on. It's the only car we have right now and I need it to take my daughter to her chemo next week.
I'm desperate. If anyone can help I would appreciate it greatly.
Thank you

100%Chevy · 03-12-2016, 05:48 PM

Here's the diagram from an 84 with 350 engine.

Mike,

Pontiac1976 · 03-12-2016, 08:52 PM

So far I have not come up with a C,K 454 (7.4L) does no show any smog pump other then the 6CYL. set up.

100%Chevy · 03-12-2016, 11:23 PM

I have a 86,C-30,454 but the stickers gone.As is the smog stuff.
A lot of California smog trucks have dual pumps and charcoal canisters.So if it's from there,it's really giong to be hard to find the info.
Maybe some place like Auto Zone has the diagrams and pictures.
All I can come up with!
Mike.

Pontiac1976 · 03-13-2016, 01:01 PM

All 73-87 here had charcoal canisters. But not all had the air pump.
the book I was looking in was us printed.
Does you big Block exhaust manifolds have the holes at the top and air injector line attached on both sides.
Pic's of your engine bay and your passenger side upper Rad support.
Is this motor all ways been in it. Have you ever replaced the exhaust manifolds.
the air pump is mounted low most times. Not sure if it share the same bracket as one of the 6cyl.

travlinman · 03-13-2016, 11:40 PM

I have a couple pictures on my phone of my 82 c30 454 with smog pump there not super detailed were only for reference. If I can figure out how to post them from my phone I'll put them up for u.

ZacharyDouglas1992 · 03-16-2016, 05:06 PM

heres a few diagrams that may or may not be helpful.

From my 83 GMC K3500 Sierra Classic, and an 83 airstream RV. Mine is the one with the Charcoal Canister.

If you are having a hard time tracking down the bracket, I may still have it somewhere in my garage - I'd have to dig. I converted mine over to serpentine. It can be yours for a 12 pack of 805 + Shipping.

tucsonjwt · 03-17-2016, 09:03 PM

I took a few pics of the smog pump on my 83 C20 454, but it is very difficult to see details. My diagram also shows a vacuum line going to the back of the smog pump, but I don't see any lines connecting directly to the pump. There seems to be a narrow rectangular piece attached to the back of the pump, which then attaches to a round canister. My guess is that you can just install the pump and as long as there are no open holes not attached to something it will pass.

03-12-2016, 09:16 AM	#1
UH8UsWeH8U2 Registered User Join Date: Mar 2016 Location: Phoenix AZ Posts: 3	454 engine smog/air pump I have a 84 chevy silverado c20. 454 engine. Im having issues with smog pump. Ordered one from ebay but not sure if I got all the necessary parts. Can anyone tell me where I can find a picture or diagram of the engine and smog pump?? If anyone has a repair manual for the 84 silverado can you maybe take a picture of the engine and smog pump repair pages from the book and send them to me please?? My truck passed emissions but they won't pass me until I get a Smog pump on. It's the only car we have right now and I need it to take my daughter to her chemo next week. I'm desperate. If anyone can help I would appreciate it greatly. Thank you

03-12-2016, 05:48 PM	#2
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: 454 engine smog/air pump Here's the diagram from an 84 with 350 engine. Mike,

03-12-2016, 08:52 PM	#3
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 766	Re: 454 engine smog/air pump So far I have not come up with a C,K 454 (7.4L) does no show any smog pump other then the 6CYL. set up. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

03-12-2016, 11:23 PM	#4
100%Chevy Registered User Join Date: Jun 2008 Location: Moss Point,Ms. Posts: 1,439	Re: 454 engine smog/air pump I have a 86,C-30,454 but the stickers gone.As is the smog stuff. A lot of California smog trucks have dual pumps and charcoal canisters.So if it's from there,it's really giong to be hard to find the info. Maybe some place like Auto Zone has the diagrams and pictures. All I can come up with! Mike.

03-13-2016, 01:01 PM	#5
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 766	Re: 454 engine smog/air pump All 73-87 here had charcoal canisters. But not all had the air pump. the book I was looking in was us printed. Does you big Block exhaust manifolds have the holes at the top and air injector line attached on both sides. Pic's of your engine bay and your passenger side upper Rad support. Is this motor all ways been in it. Have you ever replaced the exhaust manifolds. the air pump is mounted low most times. Not sure if it share the same bracket as one of the 6cyl. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

03-13-2016, 11:40 PM	#6
travlinman Registered User Join Date: Feb 2009 Location: stockton ca. Posts: 502	Re: 454 engine smog/air pump I have a couple pictures on my phone of my 82 c30 454 with smog pump there not super detailed were only for reference. If I can figure out how to post them from my phone I'll put them up for u. __________________ 94 ls swap silverado 65 Pontiac 78 c30 crew cab dually (parted and gone) 82 c30 crew cab dually ( now building ) 91 r30 crew cab dually (parted and gone) 69 swb-sold 71 lab sold all in progress......__ ..........._______ \|__\__ ..........\|__(O)______(O)] ........................

03-16-2016, 05:06 PM	#7
ZacharyDouglas1992 Registered User Join Date: Nov 2013 Location: Fowler California Posts: 140	Re: 454 engine smog/air pump heres a few diagrams that may or may not be helpful. From my 83 GMC K3500 Sierra Classic, and an 83 airstream RV. Mine is the one with the Charcoal Canister. If you are having a hard time tracking down the bracket, I may still have it somewhere in my garage - I'd have to dig. I converted mine over to serpentine. It can be yours for a 12 pack of 805 + Shipping. Attached Images __________________ 1967 CHEVELLE MALIBU 427/700R4 1971 CHEYENNE 10 350/350 1983 GMC K3500 454/400/205 1987 R10 TBI 350/700R4 2014 CRUZE 2.0 TURBO DIESEL

03-17-2016, 09:03 PM	#8
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: 454 engine smog/air pump I took a few pics of the smog pump on my 83 C20 454, but it is very difficult to see details. My diagram also shows a vacuum line going to the back of the smog pump, but I don't see any lines connecting directly to the pump. There seems to be a narrow rectangular piece attached to the back of the pump, which then attaches to a round canister. My guess is that you can just install the pump and as long as there are no open holes not attached to something it will pass. Attached Images



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