The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-09-2021, 08:10 AM   #1
Hart_Rod
*************

 
Hart_Rod's Avatar
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,640
Smog equipment removal on 87 TBI

I want to pull the smog stuff off of my 87 Jimmy (350 TBI/ 700R4 Trans).

What can go?
What has to stay?
Will I see any improvements other than it will look cleaner under the hood? What is the plug size for the 2 holes in the manifolds?

Thanks!

Rob
Attached Images
   
Hart_Rod is offline   Reply With Quote
Old 07-11-2021, 09:04 AM   #2
Corts60
Just here to tinker
 
Corts60's Avatar
 
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,252
Re: Smog equipment removal on 87 TBI

I donít think youíll notice a gain buddy. Those TBI motors arenít power makers. If you do remove it all though, I think the plug size is the same size as a drain plug for a Cummins 5.9 oil pan. Iím pretty sure. Been awhile since I played with those manifolds.
Corts60 is offline   Reply With Quote
Old 07-12-2021, 08:03 AM   #3
Hart_Rod
*************

 
Hart_Rod's Avatar
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,640
Re: Smog equipment removal on 87 TBI

Quote:
Originally Posted by Corts60 View Post
I donít think youíll notice a gain buddy. Those TBI motors arenít power makers. If you do remove it all though, I think the plug size is the same size as a drain plug for a Cummins 5.9 oil pan. Iím pretty sure. Been awhile since I played with those manifolds.
Thanks for the info. Do you know what year of Cummins? I went to OReillys and we pulled up a couple of drain plugs, but they were the wrong thread pitch M22 - 1.5. Apparently, the thread pitch of the smog holes are M22 1.25. Appreciate the help and love your "summer" Burb!
Hart_Rod is offline   Reply With Quote
Old 07-12-2021, 09:47 AM   #4
Just call me Sean
Registered User
 
Just call me Sean's Avatar
 
Join Date: Jun 2014
Location: Orlando Florida
Posts: 808
Re: Smog equipment removal on 87 TBI

I get those type of plugs at Home Depot.
__________________
Quote:
Originally Posted by Early Cuyler
Fights begin, fingerprints are took, days is lost, bail is made, court dates are ignored, cycle is repeated.
Just call me Sean is offline   Reply With Quote
Old 07-12-2021, 02:30 PM   #5
Hart_Rod
*************

 
Hart_Rod's Avatar
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,640
Re: Smog equipment removal on 87 TBI

Quote:
Originally Posted by Just call me Sean View Post
I get those type of plugs at Home Depot.
HD carries M22 1.25?
Hart_Rod is offline   Reply With Quote
Old 07-15-2021, 09:07 AM   #6
Hart_Rod
*************

 
Hart_Rod's Avatar
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,640
Re: Smog equipment removal on 87 TBI

Update: I was wrong about the thread pitch, it is M22 1.5 not 1.25. I grabbed 2 oil drain plugs for a diesel at the parts store and they fit perfect, . For future questions on this matter, the part number is Dorman 652886.

ALSO, if anyone wants this smog equipment, I will gladly box it up and send it to you if you pay shipping, just let me know .
Attached Images
 
Hart_Rod is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:11 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com