Generating heat
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
Yes. But there are several common sources of unwanted cabin heat: unshielded exhaust heat; disintegrated jute insulation under carpet; bad seal on right-side kickpanel vent door; missing or collapsed rear hood seal; etc, etc.
There are inexpensive pamphlets that list all of the usual heat sources and how to address them. Just be aware that when these cars were new, they had little problem keeping the engine cool AND the passengers cool. Eliminate/minimize the sources of heat and you will ride much cooler.
There are inexpensive pamphlets that list all of the usual heat sources and how to address them. Just be aware that when these cars were new, they had little problem keeping the engine cool AND the passengers cool. Eliminate/minimize the sources of heat and you will ride much cooler.
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 254
From: Catlett VA
I have the entire floor and firewall lined with aluminized stick-on insulation and even with the top down on my 68 convert there is still a lot of heat transferred from the engine and exhaust to the cabin of the car.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The rear hood seal and the right-side kick panel door seal are two 'big ticket' items when it comes to heat. The hood seal gets compressed (or missing) after some years and the engine compartment heat flows out the [unsealed] gap at the rear of the hood and directly into the cabin air intake (cowl area). It then flows through that right kick panel door, even if it supposed to be closed, because that seal has long worn down.
VOILA' engine heat in the cabin!!
VOILA' engine heat in the cabin!!
Last edited by 7T1vette; Jul 5, 2018 at 06:11 PM.
Safety Car
Joined: Apr 2006
Posts: 4,057
Likes: 421
From: BC
The rear hood seal and the right-side kick panel door seal are two 'big ticket' items when it comes to heat. The hood seal gets compressed (or missing) after some years and the engine compartment heat flows out the [unsealed] gap at the rear of the hood and directly into the cabin air intake (cowl area). It then flows through that right kick panel door, even if it supposed to be closed, because that seal has long worn down.
VOILA' engine heat in the cabin!!
VOILA' engine heat in the cabin!!
I found the biggest change in cabin temp was by installing a shutoff valve in the heater core inlet hose. The heater core is inside the car so keeping the core cool is a must no matter how good all the seals are.
Last edited by CanadaGrant; Jul 5, 2018 at 06:44 PM.
Instructor
Joined: May 2016
Posts: 178
Likes: 22
From: Vermont
I had the same problem with my 71-454 until I discovered that the trans. tunnel insulation pad & the foam collar heat shield ( see Corvette America 2018 cat. page 148 ) were not replaced when the car was restored. I could feel the heat poring through the shifter. Now.. no more heat problems. The collar is what seals engine heat away from the interior.
