Thermal Vacuum Valve Hose Routing

[ratman90]

Hello, I looked but did not see anything in searches of forum. We recently pulled a 72 C10 2WD LWB out of a field. She runs good for 60k miles on the 307 2 BBL. Trying to replace hoses and vacuum lines. Trying to figure out what the thermal vacuum valve was that is on the thermostat housing.

Does anyone have a diagram of the correct routing on this? We are in Longmont, Colorado and it will be cold this winter and I want it to be able to warm up and idle correctly for my 16 YO son.

Using a picture that i found on here as reference.

She was last tagged and registered in 2006 and last ran in 2011 best we can tell. New battery, Gas tank, fuel pump and some tires that hold air, she is on the road again!

Larry

[demian5]

Id just bypass for now. Unless you are keeping totally stock.

[ratman90]

Keeping it totally stock for now. But just wanted to run well and be reliable. As it has been sitting forever I want to give it every chance.

[geezer#99]

Burn us off some pics of your motor!

IIRC a '72 didn't have or need a thermal vac switch.

[toolboxchev]

Yea, Second that on the additional pics. To my knowledge the 307 did not have what looks like a more modern 305 thermostat housing.

Just my 2 cents.