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post #1 of 7 (permalink) Old 06-12-2017, 12:13 PM Thread Starter
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a/c

I have a 1967 coupe factory original drive train with factory a/c...a/c works just blowing under dash cannot get the upper vents to blow a/c thru them. Any insight on this would be great.
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post #2 of 7 (permalink) Old 06-12-2017, 02:49 PM
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There are vacuum operated doors inside the housing under the dash. Get a vacuum diagram and a hand operated vacuum pump. Use the pump to manually operate the appropriate doors to see if the vacuum motors work. If they do check the vacuum hoses for correct routing and cracks. You can purchase a complete hose kit from the suppliers. Also check your vacuum canister for rust through. I did this on my '68 and got everything working. I also had a problem with the lever assembly not sending the vacuum to the correct door and had to replace it.
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post #3 of 7 (permalink) Old 06-12-2017, 03:08 PM
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Quote:
Originally Posted by ronni67 View Post
I have a 1967 coupe factory original drive train with factory a/c...a/c works just blowing under dash cannot get the upper vents to blow a/c thru them. Any insight on this would be great.
I'm glad that you followed your thread, you'll get much better traffic and subsequent help here.

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post #4 of 7 (permalink) Old 06-12-2017, 04:02 PM
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By upper vents, you mean the ones in the face of the dash? If the hoses, control, or vacuum motor fails, the fail-safe is to route the air to the defroster. Are the big hoses from the blower connected to the dash vents? Probably, it would be odd for all three to be disconnected.

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post #5 of 7 (permalink) Old 06-12-2017, 05:52 PM
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The 67 also used a check valve in the vacuum lines. It can fail causing issues.

I just installed my 68 factory A/C and spent a lot of time getting all the vacuum lines, etc set up correctly. The replacement ,lines they sell are not correct, you are better off just buying bulk vacuum line if you need some. Three lines start at the control panel then route to the vacuum actuators & the Vacuum canister (right side of engine compartment) The canister gets vacuum from the engine manifold port. Make sure it doesn't have any leaks. I have spare check valves and actuators if you need some.

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68 289 convertible Candy-apple red & white
66 200 coupe Blue
94 GT convertible Red & black
98 GT convertible White & black
98 V6 convertible White & tan


Last edited by Flade; 06-12-2017 at 05:56 PM.
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post #6 of 7 (permalink) Old 06-18-2017, 09:53 PM Thread Starter
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the vacuum canister is in engine compartment or under dash? Thanks for all the help!
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post #7 of 7 (permalink) Old 06-19-2017, 10:22 AM
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Originally Posted by ronni67 View Post
the vacuum canister is in engine compartment or under dash? Thanks for all the help!
In 67 the canister is bolted to the fender apron under the passenger side hood hinge. In very late 67 and all of 68, a round canister was bolted to the outside of the apron under the fender. A hole was drilled through the apron for the hoses.

There are provisions for a second canister under the battery box. This was for the Swing away steering, but I have heard of cases where the factory used this location for the A/C.

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68 289 convertible Candy-apple red & white
66 200 coupe Blue
94 GT convertible Red & black
98 GT convertible White & black
98 V6 convertible White & tan

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