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Replacing the heater control valve with a manual shut off valve

stevolwevol

Well-known member
Joined
May 28, 2015
Messages
239
Location
Michigan
Corvette
1977 light blue
I replaced the heater control valve on my 77, but it doesn't seem to be working properly, so I thought about sending in for a manual shut off valve, and using it instead. Anybody out there in Corvette land ever used one of these?
 

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,268
Location
Troy,NY
Corvette
1981 dark blue metallic
I use a pair of needle nose vice grips with a wire tie around them to keep them from opening :thumb:thumb
 

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,268
Location
Troy,NY
Corvette
1981 dark blue metallic
With needle nose style vice grips

Sent from my XT1650 using Tapatalk
 

stevolwevol

Well-known member
Joined
May 28, 2015
Messages
239
Location
Michigan
Corvette
1977 light blue
I traced the vacuum line that connects to the heater control valve, and I discovered a crack in the small plastic vacuum line, preventing the control valve from working. This is why I was getting the heat through the ducts. Hard to imagine a 41 year old plastic vacuum line cracking;). I still may install the shut off valve I purchased, cause it seems more fool proof, but I did find the problem. No more cooked leg syndrome.
 

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