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 02-04-2016, 10:10 PM   #1
65chev
Registered User
 
Join Date: Jun 2011
Location: Denton, Texas
Posts: 29
What is this

Hello
What is the round plastic canister? How or what does it hook up to?
Thanks, Mike
Attached Images
 
65chev is offline   Reply With Quote
Old 02-04-2016, 10:24 PM   #2
87 STEPPER
STILL PLAYS WITH TRUX
 
87 STEPPER's Avatar
 
Join Date: Nov 2002
Location: Melbourne, Fla.
Posts: 2,764
Lightbulb Re: What is this

It's a vacuum reservoir. It store's vacuum so your A/C and cruise control will remain working when there is a larger load or vacuum demand on the engine.

There should be a small check valve placed in the hose just b4 it if you are gonna reconnect it.

It just hooks up to any vacuum connection on the intake manifold.
__________________
~~Bruce~~

MY 87 STEPPER

MY 99 2D/WD TAHOE
87 STEPPER is offline   Reply With Quote
Old 02-04-2016, 11:41 PM   #3
65chev
Registered User
 
Join Date: Jun 2011
Location: Denton, Texas
Posts: 29
Re: What is this

Ok. The cruise works, so it must be for a/c. So a vaccum hose comes from the carb to the top. How does it get to the a/c controls? Thanks. mike
65chev is offline   Reply With Quote
Old 03-05-2016, 12:42 PM   #4
mwooten92
Registered User
 
mwooten92's Avatar
 
Join Date: Jul 2009
Location: Memphis
Posts: 336
Re: What is this

subscribed.. I'd like to know aswell..
__________________
85 C-10 ShortBoxChevy!

Build Thread of my 85' C-10
http://67-72chevytrucks.com/vboard/s...d.php?t=367919
mwooten92 is offline   Reply With Quote
Old 03-05-2016, 04:26 PM   #5
ironroad9c1
Master Hater
 
Join Date: Apr 2006
Location: Temple,Tx.
Posts: 402
Re: What is this

LOL funny I seen two holes in my truck this morning right where that is wondered what had been there.
__________________
1997 C1500 ECSB 4.3/NV3500 8.5 3.42
"This evening, all of you bleeding hearts... why don't just go ahead and hug yourself for the next 20 minutes or so, because there's a really good chance you're gonna be offended".- Captain Owen Honors
ironroad9c1 is offline   Reply With Quote
Old 03-09-2016, 07:45 PM   #6
87 STEPPER
STILL PLAYS WITH TRUX
 
87 STEPPER's Avatar
 
Join Date: Nov 2002
Location: Melbourne, Fla.
Posts: 2,764
Lightbulb Re: What is this

What you need to do is get a check Vlv and some vac hose cut a 1" piece of hose place it on the can nipple then place the ck vlv on the hose then hook Engine Vac to top of ck vlv be sure it's in the right ordination and then run a hose from the ck vlv nipple to your A/C Control head and anything else that may require it.

Here is a typical Vacuum check valve. you don't have to get one with two take offs there are many different types.
Name:  Vaccume Ck Vlv.jpg
Views: 167
Size:  4.8 KB

Hope this help's.
__________________
~~Bruce~~

MY 87 STEPPER

MY 99 2D/WD TAHOE
87 STEPPER is offline   Reply With Quote
Old 03-12-2016, 10:10 AM   #7
plumbers crack
Registered User
 
plumbers crack's Avatar
 
Join Date: Dec 2013
Location: Ont Canada
Posts: 65
Re: What is this

I'd guess that your truck was or still is a big block. It's a vac reservoir, big blocks don't make good vac at times and need the reservoir to keep up good vac.
__________________
1990 GMC R35 CC dually, VE cummins, 47RH
2005 Silverado ecsb, 5.3, 2/4 drop, daily work wagon
2000 Yukon xl, 5.3 all stock, wife's truck
2007 Yukon Denali, 6.2 back up truck
plumbers crack is offline   Reply With Quote
Reply

Bookmarks


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 04:11 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com