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AC Hose to Passenger Vent
I am working on reconnecting the AC on my '78 SC. I have the hoses connected to the driver side vent and the central vent but can't figure out the passenger side. Coming off the evaporator there is a connection that goes into the cabin facing the passenger side but the vent on the passenger side seems to connect from within the trunk. Question is how does the connection going into the cabin get to the passenger side vent?
  
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Robert 1978 911 SC |
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05-28-2018, 11:46 AM
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Member 911 Anonymous
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From inside the cab up from the penlum and "Y" into the heat pipe then to the side vents. Yeah really crappy design, was not better improved until '86. The pre86 just whispers cool or hot air to you. Actually my driver side works better, if you can call it that.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-28-2018, 08:40 PM
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Registered
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pic a numba
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Kuehl 1987 911 cab, modified https://griffiths.com/ |
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05-29-2018, 03:47 AM
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Thanks, PET didn't really help as it doesn't show where or how the line connects.
It shows the line comes off the evaporator and goes into the interior. Draco you mentioned it is meant to go through the interior. Still can't seem to figure out how it goes from inside the cabin back to the trunk to connect to the line on the passenger vent. What am I missing?    
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Robert 1978 911 SC |
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05-29-2018, 09:52 AM
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Member 911 Anonymous
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#43 and #38 (Hoses) connect to #40 (Y) then #44 (hose) connects to P-side Vent.
You may be missing the Y, if so get a copper plumbing Y divertor at your local ACE. There are plastic ones but they do not hold up well to the heat That hole/port in your frunk pic is not used
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-29-2018, 09:59 AM
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Registered User
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Hmm, the hose I have coming into cabin is labeled #13. Looking at hose #8, it connects directly into the driver side vent. I believe #13 must connect directly into the passenger side. Do the small side vents get heat or just AC? If they get both, I don't understand how #13 and #8 connect in to allow for heat. Tempted to just run #13 to the vent and call it a day.
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Robert 1978 911 SC |
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05-29-2018, 11:13 AM
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Member 911 Anonymous
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You sure can, but no heat will get to that p-side vent.
The diagram shows two methods: #43-44 connect via 39-40 up from foot blower motor ( 3.2s ), AC, Heat and Fresh air vs Just #13, direct feed no heat or fresh air
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-29-2018, 03:14 PM
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Registered User
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That is very helpful. I didn't get that the diagram was showing two options so that was what had me confused. I do not have parts 35, 36 or 40 so it must be that mine was directly connected AC only. Thanks for helping me figure this out!
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Robert 1978 911 SC |
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05-29-2018, 03:36 PM
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Member 911 Anonymous
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You are most welcome, So circa '78 does not have heat at foot wells? Strange.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-30-2018, 07:59 AM
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Marble Grey
