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Old Mar 17, 2006 | 07:54 PM
  #1  
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Default Heat/AC Vacuum

This is a subject everyone avoids. To finish the interior, I need to hook up the "Bubba" 'd heater/ac vacuum lines.
Does anyone have their guages out where you can draw me a diagram as to where these lines go?
The line to the heater hose valve is missing, there is one that goes to the fresh air. Thats all I have. Any help will be appreciated!
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Old Mar 17, 2006 | 08:06 PM
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Just finished redoing mine....found this on the forum...it was a lot of help! By the way, I cut the "gang-plug" and installed each vacuum line individually. I found some small silver clamps just the right size at AutoZone....Good Luck!
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Old Mar 17, 2006 | 08:16 PM
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Nice timing for this request.
I'll be putting mine back together this weekend.

Groovy!!
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Old Mar 18, 2006 | 12:50 AM
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Originally Posted by vetteguy75
Just finished redoing mine....found this on the forum...it was a lot of help! By the way, I cut the "gang-plug" and installed each vacuum line individually. I found some small silver clamps just the right size at AutoZone....Good Luck!
I did this last year on my 76 using this kit from Dr Rebuild. If you buy the kit it comes with the little clamps. I do remember removing the donut connector that attaches the hoses and attaching each hose separately. That's the only way you can do it since the original hoses are moulded into the donut ring. Read the note: plug and seal ports 4 and 7 on valve A (AC, heat, vent, defrost) and port 2 on B which I think was the temperature control for hot and cold.
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Old Mar 18, 2006 | 03:34 AM
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Originally Posted by AlCherry
This is a subject everyone avoids. To finish the interior, I need to hook up the "Bubba" 'd heater/ac vacuum lines.
Does anyone have their guages out where you can draw me a diagram as to where these lines go?
The line to the heater hose valve is missing, there is one that goes to the fresh air. Thats all I have. Any help will be appreciated!

Dr. ReBuild has the correct hose kit for your PARTICULAR year car. The kit comes with a vacuum diagram SPECIFIC for your year car.
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Old Mar 18, 2006 | 10:10 AM
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I've just bought my vacuum hose kit and got it in the mail yesterday. I had several leaks and decided to replace all at once.

Some of the hoses look bigger, are they supposed to be?

Do you have to remove the dash to install the hoses? If so, are there clear instructions on that procedure? If not, how do you?

Also, do you just connect the hoses to the console rotary and discard it? The package didn't come with one.

First time I've done this. Would appreciate any help.
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Old Mar 18, 2006 | 10:13 AM
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Why can't somone just come up with an electrical kit to replace all that crap?
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Old Mar 18, 2006 | 07:00 PM
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Originally Posted by wagonerjim
I've just bought my vacuum hose kit and got it in the mail yesterday. I had several leaks and decided to replace all at once.

Some of the hoses look bigger, are they supposed to be?

Do you have to remove the dash to install the hoses? If so, are there clear instructions on that procedure? If not, how do you?

Also, do you just connect the hoses to the console rotary and discard it? The package didn't come with one.

First time I've done this. Would appreciate any help.


Was the kit from Dr. Rebuild? The kits I've purchased from them in the past have had the correct size tubing, connectors, and color markings, and they came with a diagram specific for my year Corvette.
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Old Mar 18, 2006 | 08:14 PM
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Thanks for the diagram! I think it helped more people than you think. Would a '76 be the same as and '80?
I put this on my adobe photoshop and enhanced the back light. It became even clearer.

Last edited by AlCherry; Mar 18, 2006 at 08:30 PM.
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Old Mar 18, 2006 | 08:20 PM
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heres mine from the 73 assembly manual ,,i color coded it like the actual tracer,,, if you have any problems e mail me i have been thru the whole thing!!!!i ran a temp vaccume line from under the hood and hit all the loads 1 by 1 ,,by removing them from the vaccume selector switch(porta vaccume switch) i used a small plastic vaccume coulping to connect the lines to the temp vaccume source,,,to check there operation very e z ,,,,, carl-------------------------------------------------------------------------
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Old Mar 19, 2006 | 12:12 AM
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Originally Posted by AlCherry
... Would a '76 be the same as and '80? .....
Vacuum Hose configurations:

1968 - Unique to that year.
1969-71 are the same.
1971-early 75 are the same.
Late 1975 - 76 are the same.
1977-82 are the same.

You will save yourself some time and aggravation if you get the proper kit from Dr. ReBuild (includes the proper diagram).

Last edited by mapman; Mar 19, 2006 at 01:20 AM.
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Old Mar 19, 2006 | 08:25 AM
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Originally Posted by mapman
Vacuum Hose configurations:

1968 - Unique to that year.
1969-71 are the same.
1971-early 75 are the same.
Late 1975 - 76 are the same.
1977-82 are the same.

You will save yourself some time and aggravation if you get the proper kit from Dr. ReBuild (includes the proper diagram).
Darn! anybody got a Dr Rebuild diagram for a 80? I already have this hose kit.
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Old Mar 19, 2006 | 09:58 AM
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I needs to get me one of those kits for my 78.
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