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 > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-29-2015, 10:08 AM   #1
Rich84
Registered User
 
Rich84's Avatar
 
Join Date: Mar 2012
Location: Woodbury, Ct.
Posts: 1,692
What is this on my LQ4

Name:  Vacuum.JPG
Views: 3732
Size:  40.5 KB

It is driven off of the serpentine belt.
The engine came out of a large box truck.
Rich84 is offline   Reply With Quote
Old 05-29-2015, 01:45 PM   #2
Clyde65
1965 Chevy C10, 2005 4.8L/4l60
 
Clyde65's Avatar
 
Join Date: Aug 2004
Location: DFW Texas
Posts: 8,546
Re: What is this on my LQ4

charcoal canister maybe???
__________________
Clyde65

Rebuild of Clyde
http://67-72chevytrucks.com/vboard/s...84#post8338184

69 Aristocrat Lo Liner build
http://67-72chevytrucks.com/vboard/s...84#post7561684



support our troops!
Clyde65 is offline   Reply With Quote
Old 05-29-2015, 07:07 PM   #3
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: What is this on my LQ4

What year/truck is it out of? I can't tell what its mounted on, is that on the power steering pump?

It looks like a diaphram sorta shape so maybe a charcoal cannister as Clyde said, or possibly a vacuum cannistor. It looks like there is a bunch of wiring going to it tho, instead of like vacuum lines or anything.

HD/Medium duty trucks have had so many cab configurations and special equipment like PTO's that its hard to diagram them or have a reference without knowing what it came out of. Trucks with dump beds or a refrigerated box or something like that have all sorts of weird wiring.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Old 05-29-2015, 07:36 PM   #4
Rich84
Registered User
 
Rich84's Avatar
 
Join Date: Mar 2012
Location: Woodbury, Ct.
Posts: 1,692
Re: What is this on my LQ4

It was a 2005 Isuzu box truck..it is above the power steering pump with its own pulley. It had one big hose that I think went to the valve cover. Everything was cut and removed..so it is hard to tell. It reminds me of the vacuum on the kick panels of ac trucks.
Rich84 is offline   Reply With Quote
Old 05-29-2015, 08:02 PM   #5
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: What is this on my LQ4

It is a Vacuum Pump, All 6.0L Isuzu NPR had them. Remove it & buy a new belt. You will need a Vacuum "Push-in" fitting for the back of the intake if your running Vacuum assisted brakes.

The Vacuum Pump supplies Vacuum to the brake booster, If the engine dies or the Pump Fails, They also had a back-up Electric Vacuum Pump, Kind of a weird system that is super expensive when parts are needed, IIRC the Vacuum pump alone is over $300 & is only available from Isuzu.

Last edited by clinebarger; 05-29-2015 at 08:12 PM.
clinebarger is offline   Reply With Quote
Old 05-31-2015, 01:09 PM   #6
MalibuSSwagon
Registered User
 
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
Re: What is this on my LQ4

That bracket looks kinda strange as well, you may just want to get a pickup bracket and belt.
MalibuSSwagon is offline   Reply With Quote
Old 05-31-2015, 03:18 PM   #7
Robznob11
Registered User
 
Robznob11's Avatar
 
Join Date: Feb 2004
Location: brownfield texas (west texas)
Posts: 1,936
Re: What is this on my LQ4

Also worth a lot of money to a hotrodder running a huge cam and wanting to retain power brakes.
__________________
The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride!
........................ ___
.........________//__{\_____
,,,,,,,/__(⊙)___//___/__(O)_/

@disciple2.rc 💪instagram💪
LED TAILS
Robznob11 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 01:02 AM.


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