Help identifying the white vacuum hose
Thread Starter
Intermediate
Joined: May 2017
Posts: 34
Likes: 4
Help identifying the white vacuum hose
The little white vacuum hose on my 79 l-48 that goes through the firewall is brittle and has a hole in it. Can someone tell me what it is for? What is involved replacing it? Thanks in advance.
Emerging Vendor
Joined: Mar 1999
Posts: 1,599
Likes: 114
From: San Diego CA
Melting Slicks
Joined: Dec 2016
Posts: 3,193
Likes: 184
From: Central Bucks County, Pennsylvania
Pre packaged you get about 2 ft. If you don’t know the present length I would get 3 to 4 ft to be safe.
Last edited by Z06LMB; Oct 1, 2017 at 06:59 PM.
Melting Slicks
Joined: May 2015
Posts: 2,365
Likes: 428
From: Cape Girardeau Missouri
Judging by the direction that line is headed it may well go to the hot water shut-off valve. The valve is on the passenger side of the engine compartment about half way back. It has two good-sized heater hoses and one tiny vacuum hose attached. If such is the line it's easy to replace as it runs directly between the valve and the switch that you see on top of the HVAC "box" when you remove the glove compartment liner.
Thread Starter
Intermediate
Joined: May 2017
Posts: 34
Likes: 4
Judging by the direction that line is headed it may well go to the hot water shut-off valve. The valve is on the passenger side of the engine compartment about half way back. It has two good-sized heater hoses and one tiny vacuum hose attached. If such is the line it's easy to replace as it runs directly between the valve and the switch that you see on top of the HVAC "box" when you remove the glove compartment liner.
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Racer
Joined: Jun 2016
Posts: 336
Likes: 29
From: Il.
On my 77 with ac that vac line went from the heater hose valve pass side of engine compartment to the vacuum switch mounted to the top of the heater box on the passenger side,when you slide the heater control over to cold it closes the valve to prevent hot water from flowing thru the heater core. I had to replace mine and I also replaced the switch on top of the heater box.