missing vacuum line?
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Senior User
Joined: Jan 2004
Posts: 349
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From: MN
missing vacuum line?
I have been trying to install a coolant filter and in there pictures it shows this vacuum valve (I think) next to the oil filler. The valve has a line coming in the top, on the firewall side. And a nipple for a line coming horizontally off the front, in the center of the round part, but no line, at least on my truck. But in the photo it shows a gray line connected to this nipple.
What does that valve or whatever do? And should I have a line there?
What does that valve or whatever do? And should I have a line there?
Junior User
Joined: Jan 2009
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Vac valve is for the heater control. On mine the heater supply hose comes from the front steel tube to a rubber 3/4" hose about 8 inches long, to the heat control valve, then to the fire wall. the valve has a black plastic cap facing the fire wall with a small vac line in the middle of it. I put the filter tee between the steel tube and the heat control valve. Hope that helps
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Senior User
Joined: Jan 2004
Posts: 349
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From: MN
On mine there is a vertical line on the firewall side of the valve. But the nipple on the front, in the center of the round valve is empty. I think a vac line should be there, but I cannot find a loose one anywhere.
