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#729823 - November 15th 2017 6:36 pm 1987 Chevy g20 smog pump  
Joined: Nov 2017
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CptTripps Offline
stranger
CptTripps  Offline
stranger

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OH
5.7/350 I can't seem to find a replacement for my smog pump without having to wait a week or more for shipping. I don't have that kind of time. I have seen alot about bypassing the pump, also can't seem to find a dummy pulley for my engine. Can I use a smaller belt? If so, does anyone know what size belt I would need exactly?

#729831 - November 15th 2017 9:06 pm Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
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frscke1 Offline
frscke1  Offline


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Van Diego California
Welcome to the site CptTripps ....

I dont know the answer to this one .


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#729846 - November 16th 2017 9:50 am Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
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tuner4life Offline
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tuner4life  Offline
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Indiana
Did 1987 use a serpentine belt? My 1985 305ci has v-belts and was as easy as removing the pump and anything else related to it, plugging the holes, and throwing the pld parts in the trash. No extra belt necessary.

I deleted the EGR while I was at it.

If you have a serpentine belt and can re-rout the belt without using an idler in place of the smog pump, just use a string to figure the correct length for a new belt


[Linked Image]

Last edited by tuner4life; November 16th 2017 9:51 am.

[Linked Image]
1985 Chevy G20 305ci/4spd Manual
#729882 - November 18th 2017 11:44 am Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
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CptTripps Offline
stranger
CptTripps  Offline
stranger

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OH
It is a serpentine, yes

#729885 - November 18th 2017 1:49 pm Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
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Wedgy Offline
old hand
Wedgy  Offline
old hand

Joined: Nov 2013
Posts: 796
West Texas
Welcome to the site Cptripps!

I believe that Tuner may be right on the belt suggestion .
My 90 G30 454 is serpentine with no smog pump. Your application uses no idler pulley with no smog pump.

A/C, PS. No K19 air injection OE. Belt #14102103

An '87 California 350 will no doubt have a smog pump.
49 state? IDK, but it looks like there is an application.
Ask your parts guy, it should come up.
The Truth is out there.

Good Hunting!


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#729888 - November 18th 2017 5:18 pm Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
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CptTripps Offline
stranger
CptTripps  Offline
stranger

Joined: Nov 2017
Posts: 4
OH
I took another trip to my auto part store, and luckily this time, the one guy there that really knows his stuff was working. Turns out they sell a belt specifically for bypassing the smog pump. Also, I do have an idler pulley, as well as the tensioner idler. Thank you guys for taking the time to try to help. I will be sticking around this site for sure, I've done some browsing here and find it quite interesting. Time for some cosmetic work on this American classic.

#729968 - November 21st 2017 3:46 pm Re: 1987 Chevy g20 smog pump [Re: tuner4life]  
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tyteric Offline
stranger
tyteric  Offline
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VAN BC
Originally Posted by tuner4life
plugging the holes,


Hey Tuner,

What did you use to plug the holes? same threaded hex head plugs?


2005 ASTRO CARGO LIFTED AWD
1989 G30 TBI CARGO with TMW
#729978 - November 22nd 2017 8:24 am Re: 1987 Chevy g20 smog pump [Re: CptTripps]  
Joined: Sep 2013
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tuner4life Offline
addict
tuner4life  Offline
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Joined: Sep 2013
Posts: 527
Indiana
Yeah, just pipe plugs. I took one of the old pipes to the parts store and just matched the threaded fitting up with a pipe plug, then bought 8 of them.


[Linked Image]
1985 Chevy G20 305ci/4spd Manual

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