Engine Temp
Race Director
Joined: Feb 2005
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Sounds ok.the 82's were set up to run higher temps....my 78 L-82 runs 185-200....you might want to flush cooling system and hose clean rad,though...
What conditions are you seeing 210 ?
What conditions are you seeing 210 ?
Last edited by rihwoods; Nov 19, 2005 at 08:35 AM.
Race Director
Joined: Feb 2005
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Originally Posted by 71redskin
thats about nomal, my 71BB ran those same temps until i put a new rad on...now i run 155-160
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
My 76 runs 195...engine runs fine, but in the summer, the cabin gets real hot...a/c doesn't work...gotta get that fixed...anybody know why it gets so hot inside? even with the tops off, at 80* weather, it's uncomfortable...really hot...but was really comfortable yesterday at 24* 
Race Director
Joined: Feb 2005
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Originally Posted by kb2fzq
My 76 runs 195...engine runs fine, but in the summer, the cabin gets real hot...a/c doesn't work...gotta get that fixed...anybody know why it gets so hot inside? even with the tops off, at 80* weather, it's uncomfortable...really hot...but was really comfortable yesterday at 24*
I've tried all kinds of different products on the 78 under carpet..nothing worked...then a poster here said best way is to stop heat is on engine side....just for info,my 78 footwells read 175 F (engine side) and 120 F cabin side with my mini-temp IR gun...in 90 F weather..
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
So rhiwood....what have you done to cool her off...like you said it's just damned uncomfortable and of course, 90 + weather is my favorite time to run the vette..
Race Director
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Originally Posted by kb2fzq
So rhiwood....what have you done to cool her off...like you said it's just damned uncomfortable and of course, 90 + weather is my favorite time to run the vette..
The 69 footwell shields are mounted with a 1" gap on clips.(about 12"x 12" )...then insulation was installed between shield and external footwell surface....you want insulation that will resist at least 500 degrees exhaust temp....another interesting point is these are not the 69 stock metal shields..they are some kind of card board material almost like heavy roofing material....have not figured that out yet,but I must get to Home Dump or Lowes to look at some roofing material for comparison...it is about 1/8" thick...
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Race Director
Joined: Feb 2005
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Originally Posted by kb2fzq
So rhiwood....what have you done to cool her off...like you said it's just damned uncomfortable and of course, 90 + weather is my favorite time to run the vette..
You can see the shield is not metal....when I do the 78,I'll bond the insulation to the shield so it will be a neater installation...then put it against footwell on clips...
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Hey rhiwoods..I gotta jump off, but wanted to put this in...maybe you can advise...
You say you tried insulation inside, under the rug? I think you said it didn't work? must be something you can get...
Also...I have stock exhaust....the heat in your opinion is coming from the exhaust or the engine compartment?
I really have to address this problem...I may live in the great white north, but...summers up here get nasty hot...
Any additional help is greatly appreciated...thanks..
You say you tried insulation inside, under the rug? I think you said it didn't work? must be something you can get...
Also...I have stock exhaust....the heat in your opinion is coming from the exhaust or the engine compartment?
I really have to address this problem...I may live in the great white north, but...summers up here get nasty hot...
Any additional help is greatly appreciated...thanks..
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Originally Posted by AlCherry
What should the running temp be? Mine runs 190 to 210. Doesn't seem to be overheating, no performance loss, no boil over. Mine is a 1980 L82 with a 350.
Melting Slicks
Joined: Jul 2004
Posts: 3,296
Likes: 8
From: Avon, Indiana
Mine stays centered on the "2" in "200" under normal driving, but when I drive up a small mountain range it creeps up so the needle is on the middle "0" in the number "200" . If I accelerate , I get a light knock. Sounds like shaking small gravel in a tin can. Does this sound like a carb or a timing issue? Radiator and hoses are new.
Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
Originally Posted by Yellow73SB
I run 200-210 with no fan and about 160-170 with the fan. The fan is a factory GM electric fan that I got at the junkyard 
Racer
Joined: Apr 2005
Posts: 464
Likes: 0
From: Charleston South Carolina
Here are some very interesting tips about the corvette cooling system
http://www.c3sharktank.com/tech2/cooling.html
http://www.c3sharktank.com/tech2/cooling.html
Race Director
Joined: Feb 2005
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Originally Posted by kb2fzq
So, let me ask you...you think the 69 shields are stock equipment?..or did someone like us get sick of the heat and just fix the problem?
Metal heat shields at footwells were a factory item on 69 vettes..the previous owner installed the shields in the picture...not sure what year GM stopped this,but my 78 did not come with them..
Burning Brakes
Joined: Aug 2005
Posts: 1,126
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From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by rihwoods
Metal heat shields at footwells were a factory item on 69 vettes..the previous owner installed the shields in the picture...not sure what year GM stopped this,but my 78 did not come with them..
Race Director
Joined: Feb 2005
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Originally Posted by kb2fzq
My 76 does not have these...I have a stock exhaust...you think the heat is definately from the pipes...not coming thru the fire wall into the cabin from the engine compartment? I definately want to stop that heat before next summer...
Take a flashlight at night and have someone shine it inside vette at your firewall while you look from engine side...seal off any areas where you see light....then you are just left with the exhaust radiant heat....also,sometimes hot air can come thru passenger side vent at kick panel...check your vacuum actuated door there...
