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Ex-99 Deville and 04 DTS owner. Now 05 DTS and 07 Audi S6 owner. 5.2L V10 power!
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Discussion Starter #1
Hey guys. Previously I had posted about my A/C vents not opening up. I know Ranger was in the thread but I forgot who else was. But I was told it might be a vacuum problem. I looked at the line an sure enough under the hood, there was a leak. The vacuum line runs out of the firewall and splits at a T. One line goes down under the battery area and another goes under the engine cover. My line that went under the engine cover was snapped in half. Looked like a clean cut razor did it. Took me a while to figure it out though because I had one line in my hand from the firewall, but didn't know where to connect it to. After some searching, I found it though. Took some sticky foam tape and taped the lines back together and now my vents work. It's just a temp repair though. I'm not gonna replace the line, but I am gonna do a better permanent repair on the line this weekend. It's holding up really well witht the temp repair so I figure it doesn't need an elaborate repair, just something that will hold up to the heat and vibration from the engine. Just wanted to post this in case someone else might have this problem and need some help.
 

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Cadillac Technician
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11,051 Posts
If it is that plastic line, you can get some 7/32" vacuum hose and slide it over the tubing to reconnect the two segments of line.
It will last forever if you do it right.
 

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Registered
Ex-99 Deville and 04 DTS owner. Now 05 DTS and 07 Audi S6 owner. 5.2L V10 power!
Joined
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864 Posts
Discussion Starter #3
Sweet, thanks! I got some electrical tape on there now but it's getting gooey from the heat. Still holding though. Just curious though, how much is a replacement line if you know? I'm a cheap ass so I won't be buying a replacement line unless it's really cheap. If not, I'll get that vacuum hose and fix it.
 

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Cadillac Technician
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11,051 Posts
I rarely ever replace them. Usually they go all over the place and it is too much work to put new ones on.
The vacuum hose trick usually works best anyway and it won't break again like the plastic lines are prone to do.

It might not be 7/32 but I think it is. The stuff looks pretty tiny and you'll have to work it into place for it to stay.
If the stuff just slides on, it is probably too big and will end up leaking or coming off.
 
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