Vacuume hoses
Thread Starter
8th Gear
Joined: Dec 2016
Posts: 8
Likes: 0
From: Fl.
Vacuume hoses
Hello Everyone,
I want to change all of my vacuume lines on my 1994 base coupe since they are cracked and need to be replaced. Trouble is, I don't know the correct hose diameter's or where to get them. I've tried Corvette Central and Ecklers. No help. Can someone please help me? Thank You!
I want to change all of my vacuume lines on my 1994 base coupe since they are cracked and need to be replaced. Trouble is, I don't know the correct hose diameter's or where to get them. I've tried Corvette Central and Ecklers. No help. Can someone please help me? Thank You!
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 764
a couple years ago, I replace everything on my 85. only a few sizes are used. most was 5/32" and as I recall, there were only couple different sizes - (i'm thinking) 1/4, 7/32, and maybe 5/16 and 3/8 - ??? I bought a 50 ft, bulk roll of the 5/32" and probably used about half the roll. IIRC, gates brand and bought it through amazon,
. other sizes, in 10 ft rolls, some local, some on-line. while your at it, replace the windshield fluid lines, cruise, and vacuum lines for the fuel line emissions. the emissions lines require lines compatible with gas and oil. I do remember getting the emission line stuff at NAPA. can't recall what's needed on an LT1 car, but my 85 used some plastic tubing assemblies. I was able to replace my patch-work pieces with good used, and NOS. pull some of your original hoses and size-match for your needs. 
Last edited by Joe C; May 25, 2018 at 07:20 AM.
Melting Slicks
Joined: Oct 2016
Posts: 2,024
Likes: 363
From: Central Alabama
Since were talking vacuum hoses, I'll pile on with another question.
I know the HVAC control vacuum hose uses a bulkhead fitting on the firewall so the hose itself doesn't actually go though. Does the hose from the cruise to the brake switch have the same setup or does the hose go all the way through.
That one hose is turning to dust on my 92 Auto.
I know the HVAC control vacuum hose uses a bulkhead fitting on the firewall so the hose itself doesn't actually go though. Does the hose from the cruise to the brake switch have the same setup or does the hose go all the way through.
That one hose is turning to dust on my 92 Auto.
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Since were talking vacuum hoses, I'll pile on with another question.
I know the HVAC control vacuum hose uses a bulkhead fitting on the firewall so the hose itself doesn't actually go though. Does the hose from the cruise to the brake switch have the same setup or does the hose go all the way through.
That one hose is turning to dust on my 92 Auto.
I know the HVAC control vacuum hose uses a bulkhead fitting on the firewall so the hose itself doesn't actually go though. Does the hose from the cruise to the brake switch have the same setup or does the hose go all the way through.
That one hose is turning to dust on my 92 Auto.
In your FSM look at or near 9B-3. I had a '93 FSM open at the time and didn't check a '92.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
Unless I am having a total brain fart. That bulkhead connector that is behind the right valve cover area is not a point where the wiring harness separates. But rather it is only a point where GM bolts the harness to the firewall and seals it off from the interior.
And YES..I have replaced many and I use silicone grease and it is still FUN to get it to go through the firewall mat and all that.
DUB
