76 Vacuum Filter
Thread Starter
Instructor
Joined: Aug 2007
Posts: 124
Likes: 0
76 Vacuum Filter
Hello..Ordered a new vacuum filter..goes before check valve...Car did not have one on before..Just the 3 port check valve...The filter is plastic/ white with one port on each end...I read in a vacuum paper from here states" pay attention when taking old filter off to install new one"..There is no clue/markings on which direction filter goes...I blew into it and it seems the same pressure on both ends..Help!..Thanks,Pete
Racer
Joined: Oct 2006
Posts: 396
Likes: 3
From: Buffalo New York
Hello..Ordered a new vacuum filter..goes before check valve...Car did not have one on before..Just the 3 port check valve...The filter is plastic/ white with one port on each end...I read in a vacuum paper from here states" pay attention when taking old filter off to install new one"..There is no clue/markings on which direction filter goes...I blew into it and it seems the same pressure on both ends..Help!..Thanks,Pete
Thread Starter
Instructor
Joined: Aug 2007
Posts: 124
Likes: 0
Thanks for the info..Now on the other hand...The vacuum line that will run to this filter and presently the 3 port filter is connected to back of carb...I had a friend email me a pic of his '76 engine and it runs to a "valve" behind carb that screws into engine..I think this "filter" helps filter out sediment into engine....My confusion is that my "valve" behind carb runs to a metal line which I found out may go to shift assist on transmission....Thanks for anymore help.....Pete
Instructor
Joined: Nov 2002
Posts: 175
Likes: 0
From: GRIMSBY N.E.LINCS. U.K.
Had mine off yesterday. It caused me a scare the day before.Headlight pods lifted real slow then one stuck up one went down on shut off.Wiper pod on 72 wouldnt open. NEARLY started a full troubleshoot of both vacuum sysems. Guess what! Had'nt cleaned that sucker out for 2 years checking back on my records.AMAZING just how much fine black dust came out it was fully blocked up.Now everything back to normal again.
POINT IS ITS A EASY THING TO OVERLOOK KEEPING IT CLEAN.
Hope this saves you and other readers some time in the future SAM.
POINT IS ITS A EASY THING TO OVERLOOK KEEPING IT CLEAN.
Hope this saves you and other readers some time in the future SAM.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
edit-does make sense though if the check valve was good it couldnt get passed it-could be wrong-sorry
Edit again-Just learned something today.All the books say the filter does in fact keep particles from entering the engine.Not sure how I got it in my head the filter protected the vacuum system from fuel vapors.Sorry for the misinformation.:o
Last edited by ...Roger...; Dec 6, 2007 at 02:00 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
- make sure that only Vacuum exists on the "demand" side of it
......(like when you stand on it, vacuum would go away without it)
- stop the vacuum system from loosing vacuum after shutoff
......(yea, right maybe 2 seconds!)
- keep the fumes and potentially fuel from being sucked into the vacuum system.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Yep, it can be a little fuzzy! The filter is there to primarily prevent any foreign objects from getting sucked into the intake. The check valve is SUPPOSED to
- make sure that only Vacuum exists on the "demand" side of it
......(like when you stand on it, vacuum would go away without it)
- stop the vacuum system from loosing vacuum after shutoff
......(yea, right maybe 2 seconds!)
- keep the fumes and potentially fuel from being sucked into the vacuum system.
- make sure that only Vacuum exists on the "demand" side of it
......(like when you stand on it, vacuum would go away without it)
- stop the vacuum system from loosing vacuum after shutoff
......(yea, right maybe 2 seconds!)
- keep the fumes and potentially fuel from being sucked into the vacuum system.