Overheating
Thread Starter
2018 Grand Sport
Joined: Nov 2005
Posts: 755
Likes: 21
From: Tarpon Springs Florida
Overheating
Ok need some help.
Just got the Tstat replaced and it was running fine. Last night took ol girl out and it started over heating and then when I stop I saw antifreeze on the passenger side pass the door leaking on the ground.
I looked under the hood and could not see where it was coming from. Anyone have any ideas.
it is a 61 carb...283 eng.
Just got the Tstat replaced and it was running fine. Last night took ol girl out and it started over heating and then when I stop I saw antifreeze on the passenger side pass the door leaking on the ground.
I looked under the hood and could not see where it was coming from. Anyone have any ideas.
it is a 61 carb...283 eng.
Last edited by sprk33; Jan 20, 2008 at 12:41 PM. Reason: car year
Tech Contributor
Joined: May 2005
Posts: 15,576
Likes: 118
From: Conroe Texas
The heater core is on the passenger side.
Assuming your car has a heater, check the 2 hoses going into the heater core above the battery, see if they are leaking. A heater core failure would leak into your interior, not on the ground.
What's your definition of overheating? If it is simply based on where the needle was on the gauge, you could have a bad temp sender.
Assuming your car has a heater, check the 2 hoses going into the heater core above the battery, see if they are leaking. A heater core failure would leak into your interior, not on the ground.
What's your definition of overheating? If it is simply based on where the needle was on the gauge, you could have a bad temp sender.
Drifting
Joined: Sep 2007
Posts: 1,369
Likes: 0
From: Detroit MI
The heater core is on the passenger side.
Assuming your car has a heater, check the 2 hoses going into the heater core above the battery, see if they are leaking. A heater core failure would leak into your interior, not on the ground.
What's your definition of overheating? If it is simply based on where the needle was on the gauge, you could have a bad temp sender.
Assuming your car has a heater, check the 2 hoses going into the heater core above the battery, see if they are leaking. A heater core failure would leak into your interior, not on the ground.
What's your definition of overheating? If it is simply based on where the needle was on the gauge, you could have a bad temp sender.
Race Director
Joined: Jul 2002
Posts: 11,593
Likes: 173
From: Clayton NC
It could also be that the shop that replaced your tstat put to much water in or there is/was an air bubble in the system. It will be important to know if you were actually overheating or simply pushing some fluid. Dave
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
If your Vette has the optional deluxe heater then check for the core leaking as another post {Jeff} sugggested as you may just be low in coolant. If so, merely loosen the pressure cap to the first notch after refilling the system. This will get you most anywhere in an emergency. 
Thread Starter
2018 Grand Sport
Joined: Nov 2005
Posts: 755
Likes: 21
From: Tarpon Springs Florida
Well I found out it was the heater core...As i was driving it to the shop to get looked at. it over heated again and antifreeze was all over the passenger side floor board. I felt my stomach cringe....looking at the floor board when i got there it was puddled up on the floor in the passenger side. Guess they will have to pull out the carpet and clean them all up and detail it. along with fix the heater core!
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Tech Contributor
Joined: May 2005
Posts: 15,576
Likes: 118
From: Conroe Texas
There's a heater control valve that is separate from the heater core, but connected to it via hoses.
If they have to pull all that out to fix a bad core, consider replacing the heater control valve too if it looks iffy.
See e-bay linky (not mine) for picture of valve
http://cgi.ebay.com/ebaymotors/1958-...spagenameZWDVW
If they have to pull all that out to fix a bad core, consider replacing the heater control valve too if it looks iffy.
See e-bay linky (not mine) for picture of valve
http://cgi.ebay.com/ebaymotors/1958-...spagenameZWDVW
Race Director
Joined: Oct 2005
Posts: 12,468
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
There's a heater control valve that is separate from the heater core, but connected to it via hoses.
If they have to pull all that out to fix a bad core, consider replacing the heater control valve too if it looks iffy.
See e-bay linky (not mine) for picture of valve
http://cgi.ebay.com/ebaymotors/1958-...spagenameZWDVW
If they have to pull all that out to fix a bad core, consider replacing the heater control valve too if it looks iffy.
See e-bay linky (not mine) for picture of valve
http://cgi.ebay.com/ebaymotors/1958-...spagenameZWDVW
I was under my dash twice in a month 20 years ago replacing pasrts and cleaning up antifreeze because the valve failed about 2 weeks after I replaced the core.
Doug
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
By refilling the system with coolant and then leaving the pressure cap tightly screwed down the fluid got forced out of the core on to your carpet. You could have left the cap at the first notch thus eliminating the pressure and therefore no antifreeze would have been pushed out of the core. It would not have overheated the engine either. Too late now, let hope no further damage. 
Thread Starter
2018 Grand Sport
Joined: Nov 2005
Posts: 755
Likes: 21
From: Tarpon Springs Florida
Ok took your all word on it. I had them order the control valve and replace it while im doing the heater core. that way i dont end up back under there again in a month or sooner like some. thks
