thought's on keeping interior cooler
Thread Starter
Instructor
Joined: May 2008
Posts: 167
Likes: 1
From: kenmore ny
thought's on keeping interior cooler
Any thought's on keeping the interior cooler on hot summer days from unwanted heat on my 76 with no A C.
like
Dyno mat, Elc. fan, High perf. water pump, Dif. thermostat
MY thought is if I keep the engine running cooler it maybe might reduce heat or am i going to half to deal with it.
thanks for looking
like
Dyno mat, Elc. fan, High perf. water pump, Dif. thermostat
MY thought is if I keep the engine running cooler it maybe might reduce heat or am i going to half to deal with it.
thanks for looking
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
Check threads on heater core shut off valve. One way to check if you are getting heat from the heater core when heat is shut off.
Drive car in morning when outside temp. is low
Check outside air temp. with thermometer, digital if available.
Then while driving fully warmed up car check air temp. from vents with full cold setting.
If there is an increase of 10 or more degrees you heater control valve may be leaking hot coolant into heater core. First and easiest thing to check.mds...
Drive car in morning when outside temp. is low
Check outside air temp. with thermometer, digital if available.
Then while driving fully warmed up car check air temp. from vents with full cold setting.
If there is an increase of 10 or more degrees you heater control valve may be leaking hot coolant into heater core. First and easiest thing to check.mds...
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
When I had my Heater/AC Cover off, for other issues.
I used spray-On truck bed Insulator with several coats inside and out,
to insulate the cover, and help Insulate from Hot motor air.
with the dash out you can take insulator Matt all the way up the firewall.
lots off places for air leaks too. 69VETT
I used spray-On truck bed Insulator with several coats inside and out,
to insulate the cover, and help Insulate from Hot motor air.
with the dash out you can take insulator Matt all the way up the firewall.
lots off places for air leaks too. 69VETT
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
Check for leaks at grommets where vac hoses come through
Check for leaks at clutch linkage boot
Check for leaks at firewall where speedo and tach cables come through
Install a pair of heat deflectors from a 69
Install foil water heater insulation from Home Depot or Lowes beneath carpet
Replace rear hood seal to keep hot air out of vent intakes
Install heater hose valve as mentioned above
Install window film
AND most important - drive only at night!
Check for leaks at clutch linkage boot
Check for leaks at firewall where speedo and tach cables come through
Install a pair of heat deflectors from a 69
Install foil water heater insulation from Home Depot or Lowes beneath carpet
Replace rear hood seal to keep hot air out of vent intakes
Install heater hose valve as mentioned above
Install window film
AND most important - drive only at night!
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Burning Brakes
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
Put reflective insulation on the underside (outside) of the floorpan, trans tunnel and firewall. This reflects a significant amount of heat before it gets into the fibreglass body.... then a good internal insulation barrier under the carpet helps reduce it further from entering the cabin.
Here's my underside, using 3mm fibreglass matting which has a reflective aluminium surface layer.... purchased from a trucking supply shop. Used extensively to reduce heat in turbocharged apps.
Material is rated to 950*F..... I used a high temp silicon adhesive to bond it to floorpan.
Before I installed it, after 15 minutes it would become unbearably hot underfoot in summer time.
I now have no problems with 2 hour country drives even on hottest days. The A/C actually provides reasonable cooling effect now.
Here's my underside, using 3mm fibreglass matting which has a reflective aluminium surface layer.... purchased from a trucking supply shop. Used extensively to reduce heat in turbocharged apps.
Material is rated to 950*F..... I used a high temp silicon adhesive to bond it to floorpan.
Before I installed it, after 15 minutes it would become unbearably hot underfoot in summer time.
I now have no problems with 2 hour country drives even on hottest days. The A/C actually provides reasonable cooling effect now.
2nd Gear
Joined: Oct 2004
Posts: 2
Likes: 0
81 Vette w/AC 4 speed manual, Pull your glove box insert out and check the end of your cable when sliding from Hot to Cold, there is a mechanical contact that closes your vents at the end of the cable. Mine was not making full contact until I adjusted the cable, cool as a cucumber now.
Pat
Pat
