75 Stingray A/C
Thread Starter
Instructor
Joined: Mar 2013
Posts: 126
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St. Jude Donor '14
75 Stingray A/C
Like I said in other posts this is my first corvette. My question is the car came originally with A/C. But for some reason was taken out. Do you need the A/C unit to run heater and defroster? I see no heater hose so I assuming the A/C is needed to run everything. I don't care about A/C but defroster and heat would be good. Thanks for your help
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Not needed for a '76 so I doubt it's req'd for a '75 to run htr/def. I removed my condensor, compressor and the associated tubing/hoses back to the VIR. Htr/def works normal. Are the hoses still connected running from the top of your intake manifold and the water pump back to the heater core?
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
The inlet/outlet tubes for the heater core are tucked well under the firewall and may not be seen looking down into the engine bay. You may have to feel for them or look from underneath.
Thread Starter
Instructor
Joined: Mar 2013
Posts: 126
Likes: 2
St. Jude Donor '14
75 Stingray A/C
Thanks, so if there is a connection the water pump hose connects to which heater core tube? And the intake connection is at the inlet or where ? the motor is a crate vortec 350 96-00 Gen1.
Instructor
Joined: Mar 2013
Posts: 108
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From: Georgia
If I remember right, the hose sizes are not the same. The water pump hose goes to the bottom heater coil connectiong and the top heater coil connection goes to the front passenger side of the intake. There should be a hose nipple up by the thermastat housing.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Not sure but you may also need a diverter valve(?) that is vacuum operated that stops the flow of water into the htr core.
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Team Owner
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From: Southbound
Cruise-In II Veteran
Roger: the 75 assembly instruction manual (AIM) could be a help for you. The AIM shows the correct routing for the heater hoses. You're going to want the AIM for more than just heater hoses.
Last edited by Easy Mike; May 9, 2013 at 09:43 AM.
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