Just kidding. Air conditioning is the ticket.
Heated up
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Heated up
I usually hang out in the C4 section but I have a friend whose wife who won’t ride with him because it is to hot inside the passenger compartment of his C3. I told my buddy that I would check on here to see what you guys have found to be effective. Thanks for in advance for any help you can offer.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
Well, here's the deal. There is an extremely hot water heater hose from the engine to the heater core. GM engineers thought it would be a good idea to be able to control that amount of hot water from the dash / console levers. So far, so good. But they also thought the shut-off valve at the heater hose should be operated by engine vacuum. Now this is on a vehicle that has more vacuum needs than most. I am sure the valve worked the first year of production. Not so much, later.
So, C3 owners figured out how to add a manual shut-off valve on the heater hose. This instantly reduced cabin temps by 2,000 degrees, give or take 1,950 degrees.
The shut-off valves can be had from NAPA as well as other places. About $25. Fits either 5/8" hose or 3/4". Simple turn off / on like a petcock. Just splice the heater hose, install valve, clamp.
Close it in the summer. Open in Spring / Fall.
So, C3 owners figured out how to add a manual shut-off valve on the heater hose. This instantly reduced cabin temps by 2,000 degrees, give or take 1,950 degrees.
The shut-off valves can be had from NAPA as well as other places. About $25. Fits either 5/8" hose or 3/4". Simple turn off / on like a petcock. Just splice the heater hose, install valve, clamp.
Close it in the summer. Open in Spring / Fall.
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,557
Likes: 7,006
From: New Or-leens Loo-z-anna
Look at the "Interior Heat" thread....everything you can possibly do to cool down the engine compartment and the car interior!
Click on the link below...…..
https://www.corvetteforum.com/forums...rior-heat.html
Click on the link below...…..
https://www.corvetteforum.com/forums...rior-heat.html
Melting Slicks
Joined: Feb 2017
Posts: 3,232
Likes: 1,232
From: PHX AZ
Heat build up....
1. Aforementioned heater hose to heater core.
2. Boot UNDER the gearshift of shifter quadrant...everybody forgets those.
3. Boot over the shifter...there are TWO.
4. Tunnel insulation...the exh. pipes are running there.
5. Floorboard insulation.
6. Tell wife to keep her mouth shut....she's heating up the car!
Early C-3's had JUST a fiberglass one layer floor and tunnel....mid-years had a steel sandwiched floor....late models had steel, fiberglass and balsa floor.
Unkahal
1. Aforementioned heater hose to heater core.
2. Boot UNDER the gearshift of shifter quadrant...everybody forgets those.
3. Boot over the shifter...there are TWO.
4. Tunnel insulation...the exh. pipes are running there.
5. Floorboard insulation.
6. Tell wife to keep her mouth shut....she's heating up the car!
Early C-3's had JUST a fiberglass one layer floor and tunnel....mid-years had a steel sandwiched floor....late models had steel, fiberglass and balsa floor.
Unkahal
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