I need your help (Please) engine heat in car
Thread Starter
Cruising
Joined: Jan 2007
Posts: 12
Likes: 0
From: Arcadia Florida
I need your help (Please) engine heat in car
Ok i bought this 1976 factory ac a few months ago been working on it slowly interior,brakes,radiator etc etc Im finding many things that need attention But the one that has me puzzled is
Heat from engine compartment is comming thru ac vents
I know its from engine compartment because I had valve cover leak and smoke from oil on manifolds came in ac vents allso
Probably simple but it has me stumped.
Need your input Thanks
Heat from engine compartment is comming thru ac vents
I know its from engine compartment because I had valve cover leak and smoke from oil on manifolds came in ac vents allso
Probably simple but it has me stumped.
Need your input Thanks
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
Ok i bought this 1976 factory ac a few months ago been working on it slowly interior,brakes,radiator etc etc Im finding many things that need attention But the one that has me puzzled is
Heat from engine compartment is comming thru ac vents
I know its from engine compartment because I had valve cover leak and smoke from oil on manifolds came in ac vents allso
Probably simple but it has me stumped.
Need your input Thanks
Heat from engine compartment is comming thru ac vents
I know its from engine compartment because I had valve cover leak and smoke from oil on manifolds came in ac vents allso
Probably simple but it has me stumped.
Need your input Thanks
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Check the cowling seal on the rear of your hood. If it is not sealing, engine heat will enter your cabin duct work. Just put a little grease on it and shut the hood. If it's sealing, the sealing portion of the cowling will have grease on it. Good luck!
Thread Starter
Cruising
Joined: Jan 2007
Posts: 12
Likes: 0
From: Arcadia Florida
ok checked all. found that vent door stays open when everything is off and when ac is on high. close in all other positions even when vent is supposed to be on?? can that be right??
Thanks again for all your help
Thanks again for all your help
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Instructor
Joined: Jan 2006
Posts: 225
Likes: 0
From: Auburndale Florida
Just a few un-trained thoughts....
I recently purchased a beautiful 72 454 BB. And I have noticed the same heat in the pass. compartment (but without the smoke). I am preparing to wrap all exhaust pipes with a heat wrap and plan on pulling the interior and heat shielding every square inch of the glass I can find to cut down on the intrusion, again just a thought.
Ken
Ken
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
Melting Slicks
Joined: Aug 2002
Posts: 3,334
Likes: 4
From: Midland TX
I recently purchased a beautiful 72 454 BB. And I have noticed the same heat in the pass. compartment (but without the smoke). I am preparing to wrap all exhaust pipes with a heat wrap and plan on pulling the interior and heat shielding every square inch of the glass I can find to cut down on the intrusion, again just a thought.
Ken
Ken
Many people put foil backed heat and sound insulation under the carpet. I'll do that when I work on my interior.
As for the exhaust in the a/c vents - as mentioned - make sure the weatherstrip is sealing off on the rear edge of the hood. The air intake for the a/c system is on the passenger side in the wiper trough (base of the windshield). If the hood is not sealing off, air will be forced out this area and right into the wiper trough.
Thread Starter
Cruising
Joined: Jan 2007
Posts: 12
Likes: 0
From: Arcadia Florida
I allready installed heat shield and insulation when I installed carpet
I will replace hood seal as I have new one that came with weather strip kit it looked ok but I didnt think it did much
thanks for the info
I will replace hood seal as I have new one that came with weather strip kit it looked ok but I didnt think it did much
thanks for the info
Intermediate
Joined: Nov 2005
Posts: 36
Likes: 0
From: Boonville Missouri
Cabin Heat
Florida Vette, Did it make any difference when you installed your rad? I just changed out mine and hoping for a cooler cabin. Weather here is bad now, so I haven't had it out to see if it made a difference.
Racer
Joined: Mar 2006
Posts: 366
Likes: 1
From: Houston Texas
Have you checked that the exterior fresh air flapper (passenger side behind wire mesh at fender with the wiper linkage) is opening and the seals around the blower motor are good? If this is closed and the kick panel flapper is closed you may be drawing air from the engine compartment through a bad fan seal. You should be able to see the fan through this fresh air intake.
Safety Car
Joined: Dec 2004
Posts: 4,876
Likes: 1
From: Jersey Shore Exit 98
Cabin heat is a problem w/all vette's. Many guys myself included install a shut-off valve in the heater core line. In the summer you shut off the flow to the heater core & shut-down the cabin heat. In the winter (if you need heat) you turn the valve on to return the flow. You can get a shut-off valve at any hardware store under $10. you will need a piece of pipe, 4 inchs long that has threads on both ends. You cut the pipe in half screw into both sides of the valve then cut your hose to the heater core, you then install the valve between the cut hose w/a clamp on each side. done no more cabin heat.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
I published this quite a while ago and I've recommended this fix to many on the forum. Quite a few people have had excellent results performing this fix and it's cheap to do. Read the article and do a little investigating. I think you'll be surprised by the amount of heat coming into your system from this area. Good luck.
https://www.corvetteforum.com/techti...=241&TopicID=3
https://www.corvetteforum.com/techti...=241&TopicID=3
w/vettfixr!