454 smog pump delete - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Nodnarb76 · 01-16-2015, 09:21 PM

Going to be replacing the entire exhaust system soon and when I get new manifolds, I want to eliminate the smog pump/ air system.
The smog pump is on the passenger side under the alternator.
Has anyone done this and could recommend a new altenator belt that eliminates the smog pump?
Or should I go with this:
http://www.summitracing.com/parts/nal-10129569
And does anyone have any experience with one?
This is on an 87 R20 suburban.

donut · 01-16-2015, 09:27 PM

Mock it up, run a string to get a length, off to the local auto parts store you go. I think I posted the belt number somewhere, but I can't remember.

Nodnarb76 · 01-16-2015, 11:07 PM

I have read about the string method, but when I do this I may not have another car to run to the store in.
Read once that the Dayco Poly Rib #5060530 was the belt I need, but wanted a second opinion.
Worst case scenario I may just wait until I can borrow someone else's car though.

donut · 01-17-2015, 11:18 AM

Now that the sun's up. I used an O'Reilly belt 6k523. This is the number on the belt.
I used them cause it's close.

Nodnarb76 · 01-17-2015, 03:31 PM

Thank you so much! Will be heading to O'Reilly's soon.
Thanks for taking the time to look for me!
This board rocks!

donut · 01-17-2015, 10:13 PM

I was back and forth a couple times till I got the right belt. Hope it works for you.

mattybilt79 · 02-05-2015, 02:09 PM

Donut thank you for posting the belt number as it saved my ass yesterday! I left the smog pump on the 87 BBC motor that I swapped into my 85 cc thinking I would delete it later but figured no harm just letting it pump air to no where. Well long story short the damn thing started seizing up on the road yesterday pulling the 5th wheel! Luckily one of the two auto parts stores in the bfe town we were in had one an 060523 gates hanging on the wall. I tried to push through and didn't put the belt on right away but it got so loud I finally stopped and put it on in the middle of no where. Luckily all I had to do was pull the pulley off the smog pump and get the new belt on and it cleared the pump. But I really do appreciate the forum and people like you who take the time to post good info like that!

Chevy3+3 · 03-02-2016, 06:34 PM

I am deleting the smog pump on my 454 tbi truck but what do I do with the 2 wire connector running to a valve hooked to my smog pump?

Nodnarb76 · 03-02-2016, 06:36 PM

Quote:

Originally Posted by Chevy3+3

I am deleting the smog pump on my 454 tbi truck but what do I do with the 2 wire connector running to a valve hooked to my smog pump?

When I removed mine I just left it unplugged, had no problems.

Chevy3+3 · 03-02-2016, 06:39 PM

Quote:

Originally Posted by Nodnarb76

When I removed mine I just left it unplugged, had no problems.

Sweet! DO you know what that thing is that the wire was connected to? Only reason I ask is because if it doesn't change anything when its unplugged then it probably didn't do anything to start with. just seems wierd

Nodnarb76 · 03-02-2016, 06:56 PM

Quote:

Originally Posted by Chevy3+3

Sweet! DO you know what that thing is that the wire was connected to? Only reason I ask is because if it doesn't change anything when its unplugged then it probably didn't do anything to start with. just seems wierd

Looks like it got a signal from the PCM to open/close. I recently removed the whole TBI harness and traced the plug back to the PCM. I had no check engine lights when I left it unplugged. Looks like it
just tells it to open or close, and does not get any info back to the pcm.

slotard · 03-02-2016, 07:01 PM

I'm surprised tha you can just remove emissions equipment with no cel. No way could you do that now I imagine.

Firebirdjones · 03-03-2016, 08:46 AM

Quote:

Originally Posted by slotard

I'm surprised tha you can just remove emissions equipment with no cel. No way could you do that now I imagine.

Yeah, you can if you change the tune to report no CEL with HPtuners

Chevy3+3 · 03-03-2016, 08:49 AM

Quote:

Originally Posted by Firebirdjones

Yeah, you can if you change the tune to report no CEL with HPtuners

I feel like a newbie to ask this but what is CEL?

Firebirdjones · 03-03-2016, 08:56 AM

Check engine light.

Chevy3+3 · 03-03-2016, 08:59 AM

Quote:

Originally Posted by Firebirdjones

Check engine light.

Lol! I can't believe I asked that. I knew that i just wasnt thinking clearly when i asked, lol. It's still to early in the morning for this ol boy after working 2nd shift last night.

Firebirdjones · 03-03-2016, 09:03 AM

No worries, I actually had to think a minute on that myself, I've called it CEL for so long I almost got stumped with that question

01-16-2015, 09:21 PM	#1
Nodnarb76 Registered User Join Date: May 2013 Location: Mississippi Posts: 501	454 smog pump delete Going to be replacing the entire exhaust system soon and when I get new manifolds, I want to eliminate the smog pump/ air system. The smog pump is on the passenger side under the alternator. Has anyone done this and could recommend a new altenator belt that eliminates the smog pump? Or should I go with this: http://www.summitracing.com/parts/nal-10129569 And does anyone have any experience with one? This is on an 87 R20 suburban. __________________ 1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824

01-16-2015, 09:27 PM	#2
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: 454 smog pump delete Mock it up, run a string to get a length, off to the local auto parts store you go. I think I posted the belt number somewhere, but I can't remember. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

01-16-2015, 11:07 PM	#3
Nodnarb76 Registered User Join Date: May 2013 Location: Mississippi Posts: 501	Re: 454 smog pump delete I have read about the string method, but when I do this I may not have another car to run to the store in. Read once that the Dayco Poly Rib #5060530 was the belt I need, but wanted a second opinion. Worst case scenario I may just wait until I can borrow someone else's car though. __________________ 1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824

01-17-2015, 11:18 AM	#4
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: 454 smog pump delete Now that the sun's up. I used an O'Reilly belt 6k523. This is the number on the belt. I used them cause it's close. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

01-17-2015, 10:13 PM	#6
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: 454 smog pump delete I was back and forth a couple times till I got the right belt. Hope it works for you. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

01-17-2015, 03:31 PM	#5
Nodnarb76 Registered User Join Date: May 2013 Location: Mississippi Posts: 501	Re: 454 smog pump delete Thank you so much! Will be heading to O'Reilly's soon. Thanks for taking the time to look for me! This board rocks! __________________ 1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824

02-05-2015, 02:09 PM	#7
mattybilt79 Registered User Join Date: Nov 2014 Location: Arizona mostly Posts: 114	Re: 454 smog pump delete Donut thank you for posting the belt number as it saved my ass yesterday! I left the smog pump on the 87 BBC motor that I swapped into my 85 cc thinking I would delete it later but figured no harm just letting it pump air to no where. Well long story short the damn thing started seizing up on the road yesterday pulling the 5th wheel! Luckily one of the two auto parts stores in the bfe town we were in had one an 060523 gates hanging on the wall. I tried to push through and didn't put the belt on right away but it got so loud I finally stopped and put it on in the middle of no where. Luckily all I had to do was pull the pulley off the smog pump and get the new belt on and it cleared the pump. But I really do appreciate the forum and people like you who take the time to post good info like that! __________________ 85 3+3 with a tee-pee

03-02-2016, 06:34 PM	#8
Chevy3+3 Registered User Join Date: Oct 2013 Location: Winfield KS Posts: 489	Re: 454 smog pump delete I am deleting the smog pump on my 454 tbi truck but what do I do with the 2 wire connector running to a valve hooked to my smog pump? __________________ 88' Chevy V30 3+3 4x4 Dually 454 TBI/NV4500/NP205

03-02-2016, 07:01 PM	#12
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: 454 smog pump delete I'm surprised tha you can just remove emissions equipment with no cel. No way could you do that now I imagine. __________________ 1973 C20, 350/350

03-03-2016, 08:56 AM	#15
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: 454 smog pump delete Check engine light.

03-03-2016, 09:03 AM	#17
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: 454 smog pump delete No worries, I actually had to think a minute on that myself, I've called it CEL for so long I almost got stumped with that question



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