Air Injection Removal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85Silverado · 12-15-2002, 11:33 PM

Anyone know the best way to removing the air injection system? Thanks for any and all info

TC70C10 · 12-17-2002, 10:05 AM

I just dropped in a rebuilt 305 in my 81 K5 Blazer. Tossed AIR pump in trash, cut ltubing on both the inside and outsided of the exhaust manifolds, crimped them and rolled them up. Needed to buy a different altenator belt (think it was 15445 at Autozone). Routing the vacuum lines took some clear headed thinking (- the beer).

85Silverado · 12-17-2002, 10:32 AM

Do you have any pics of your engine bay? It would be greatly appreciated if you do.

mckpaul · 12-17-2002, 04:31 PM

Hmmm.... I have an '84 with a 305 LE9 that's had all the stuff removed.... air pump's not there, tubes on exhaust monifolds cut and crimped closed, and everything in between is gone. Vacuum system is stripped down to the basic distributor advance and a pcv hose. I get the fun of putting it all back, never seeing the original layout.

So.. watcha gonna do with all that junk you pull off?? Most of it I plan to buy new, most of it is sold at the parts house, but will only be able to get basic components, won't get mounting brackets for the air pump, preformed hoses, misc mounting hardware, etc.

PHOENIX · 12-17-2002, 06:30 PM

Instead of cutting and crimping the injection lines you can unbolt them from the manifold and cap the holes with brass plugs. These brass plugs can be found at checker or autozone, you may need to ask about them because they keep them behind the counter.

Just remove the smog pump and replace the belt for the alternator. You may need to keep the bracket that holds the smog pump there so that the alternator still has the same attachment or you could fab something up like a spacer or something. I really dont remember if they are attached to the same bracket or not. I do not think they are but keep it in mind anyway.

Run a search about adding smog equippment in this forum and youll find another post I did for a guy which explained what he needed to get so that he could pass emissions. That will give you a good idea of what to do.

85Silverado · 12-17-2002, 06:42 PM

well...it was gonna go in the trash....but sounds like you need it...the only things i can think of that i MIGHT need...would be the air pump bracket if it's part of the alternator bracket...but other then that i don't think there's anything else i'd need....i'll send everything i pull off, (pump, bracket*if i don't need it*, vacuum hoses, preformed hoses that go to the air manifold that goes into the exhaust manifold, etc, minus the air injection tubes that go into the exhaust manifold...cause i'll have to cut and crimp them too...i'd take them out but they look rusted into the manifold and i rather not risk them breaking and having holes in the manifold that i can't fill or fix. As far as I know the air pump is working..it's not making any funny noises or anything that i know of and everything appears to be there, so if you want...just let me know....how's 10 + shipping?

Also....anyone know how to run the pcv vacuum hose and the vacuum advance hose once i get rid of all the smog vac hoses?

mckpaul · 12-18-2002, 10:01 AM

Cool! I'll send you an email & we can work it out from there.

85Silverado · 12-18-2002, 10:05 AM

Alright, I'll be waiting for it. Gonna go out today to see what it all entails and possibly take it off today...it's supposed to be like 50 degrees out today but windy and rainy and a possible thunderstorm (in december???), but that's what the weather man says...but we all know he's only right about a 1/4 of the time..hehe

mckpaul · 12-18-2002, 10:48 AM

Sent an email from your profile...

All the way up to 50 today huh? Sounds warm for this time of year for up there where you are. Yep.. got a real chiller of a winter going here, was 70 on the way to work this morning, going to be in the upper 70's later today

12-15-2002, 11:33 PM	#1
85Silverado Registered User Join Date: Dec 2002 Location: Milwaukee, Wisconsin Posts: 198	Air Injection Removal Anyone know the best way to removing the air injection system? Thanks for any and all info __________________ Paul D. '78 C20 Scottsdale 350ci 3 speed with granny gear 14 bolt rearend My trucks are "Car-Guy safe".......which pretty much means death trap in the hands of a normal civilian.

12-17-2002, 10:05 AM	#2
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	I just dropped in a rebuilt 305 in my 81 K5 Blazer. Tossed AIR pump in trash, cut ltubing on both the inside and outsided of the exhaust manifolds, crimped them and rolled them up. Needed to buy a different altenator belt (think it was 15445 at Autozone). Routing the vacuum lines took some clear headed thinking (- the beer). __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

12-17-2002, 10:32 AM	#3
85Silverado Registered User Join Date: Dec 2002 Location: Milwaukee, Wisconsin Posts: 198	Do you have any pics of your engine bay? It would be greatly appreciated if you do. __________________ Paul D. '78 C20 Scottsdale 350ci 3 speed with granny gear 14 bolt rearend My trucks are "Car-Guy safe".......which pretty much means death trap in the hands of a normal civilian.

12-17-2002, 04:31 PM	#4
mckpaul Registered User Join Date: Dec 2002 Location: Houston Posts: 300	injection removal Hmmm.... I have an '84 with a 305 LE9 that's had all the stuff removed.... air pump's not there, tubes on exhaust monifolds cut and crimped closed, and everything in between is gone. Vacuum system is stripped down to the basic distributor advance and a pcv hose. I get the fun of putting it all back, never seeing the original layout. So.. watcha gonna do with all that junk you pull off?? Most of it I plan to buy new, most of it is sold at the parts house, but will only be able to get basic components, won't get mounting brackets for the air pump, preformed hoses, misc mounting hardware, etc. __________________ Paul 1984 Chevy C-10 LWB/305

12-17-2002, 06:30 PM	#5
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Instead of cutting and crimping the injection lines you can unbolt them from the manifold and cap the holes with brass plugs. These brass plugs can be found at checker or autozone, you may need to ask about them because they keep them behind the counter. Just remove the smog pump and replace the belt for the alternator. You may need to keep the bracket that holds the smog pump there so that the alternator still has the same attachment or you could fab something up like a spacer or something. I really dont remember if they are attached to the same bracket or not. I do not think they are but keep it in mind anyway. Run a search about adding smog equippment in this forum and youll find another post I did for a guy which explained what he needed to get so that he could pass emissions. That will give you a good idea of what to do. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

12-17-2002, 06:42 PM	#6
85Silverado Registered User Join Date: Dec 2002 Location: Milwaukee, Wisconsin Posts: 198	well...it was gonna go in the trash....but sounds like you need it...the only things i can think of that i MIGHT need...would be the air pump bracket if it's part of the alternator bracket...but other then that i don't think there's anything else i'd need....i'll send everything i pull off, (pump, bracketif i don't need it, vacuum hoses, preformed hoses that go to the air manifold that goes into the exhaust manifold, etc, minus the air injection tubes that go into the exhaust manifold...cause i'll have to cut and crimp them too...i'd take them out but they look rusted into the manifold and i rather not risk them breaking and having holes in the manifold that i can't fill or fix. As far as I know the air pump is working..it's not making any funny noises or anything that i know of and everything appears to be there, so if you want...just let me know....how's 10 + shipping? Also....anyone know how to run the pcv vacuum hose and the vacuum advance hose once i get rid of all the smog vac hoses? __________________ Paul D. '78 C20 Scottsdale 350ci 3 speed with granny gear 14 bolt rearend My trucks are "Car-Guy safe".......which pretty much means death trap in the hands of a normal civilian. Last edited by 85Silverado; 12-17-2002 at 06:59 PM.

12-18-2002, 10:01 AM	#7
mckpaul Registered User Join Date: Dec 2002 Location: Houston Posts: 300	Cool! I'll send you an email & we can work it out from there. __________________ Paul 1984 Chevy C-10 LWB/305

12-18-2002, 10:05 AM	#8
85Silverado Registered User Join Date: Dec 2002 Location: Milwaukee, Wisconsin Posts: 198	Alright, I'll be waiting for it. Gonna go out today to see what it all entails and possibly take it off today...it's supposed to be like 50 degrees out today but windy and rainy and a possible thunderstorm (in december???), but that's what the weather man says...but we all know he's only right about a 1/4 of the time..hehe __________________ Paul D. '78 C20 Scottsdale 350ci 3 speed with granny gear 14 bolt rearend My trucks are "Car-Guy safe".......which pretty much means death trap in the hands of a normal civilian.

12-18-2002, 10:48 AM	#9
mckpaul Registered User Join Date: Dec 2002 Location: Houston Posts: 300	Sent an email from your profile... All the way up to 50 today huh? Sounds warm for this time of year for up there where you are. Yep.. got a real chiller of a winter going here, was 70 on the way to work this morning, going to be in the upper 70's later today __________________ Paul 1984 Chevy C-10 LWB/305



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