over heating need help
Thread Starter
Instructor
Joined: Feb 2002
Posts: 152
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From: margate florida
over heating need help
i have a LS6 in my 70 vette p/s pb, and a/c the stat is 160 the temp gauge is reading 200 when i stop and shut the car off it's antifreeze out the over flow time. :U jim
Burning Brakes
Joined: Apr 2000
Posts: 1,012
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From: Minnesota
Re: over heating need help (1970LS6)
Lots of possibles
1.Drain radiator,fill with 25% antifreeze,75% distilled water, and a bottle or two of "water wetter"
2. New radiator cap
3.Remove front license plate bracket if your state allows only 1 plate
4.Check all radiator support seals and replace if necessary
.More drastic measures if still not cured or satisfied such as:
1.Hi Flow water pump--several good brands(check Jegs or Summit)(beware a new hi-flow water pump may knock things loose and you will have heater core problems)
2. Remove radiator and have it rodded out--many years old
3.New aluminum radiator--several good brands(a bit spendy though)
Other members may have other ideas-not an uncommon problem with the Corvettes
SEMPER FI--1970 Dave :)
[Modified by 1970 Dave, 8:28 PM 7/26/2002]
1.Drain radiator,fill with 25% antifreeze,75% distilled water, and a bottle or two of "water wetter"
2. New radiator cap
3.Remove front license plate bracket if your state allows only 1 plate
4.Check all radiator support seals and replace if necessary
.More drastic measures if still not cured or satisfied such as:
1.Hi Flow water pump--several good brands(check Jegs or Summit)(beware a new hi-flow water pump may knock things loose and you will have heater core problems)
2. Remove radiator and have it rodded out--many years old
3.New aluminum radiator--several good brands(a bit spendy though)
Other members may have other ideas-not an uncommon problem with the Corvettes
SEMPER FI--1970 Dave :)
[Modified by 1970 Dave, 8:28 PM 7/26/2002]
Le Mans Master
Joined: Jul 1999
Posts: 7,072
Likes: 4
From: Maryland
Re: over heating need help (1970LS6)
Have you let it belch itself and then settle down to a lower level? They tend to increase in temp after you shut down since the fans aren't running and the block is heat soalked. I know on occasion when I've overfilled mine it belches once or maybe twice and then it's fine. ~Juliet
Senior Member since 1492
Joined: Aug 2000
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: over heating need help (Juliet)
Sounds like my Vette when I bought it. If you're running a consistant 200 then I'd bet a 160 thermostat is always open.
I removed the stat & installed a Moroso restrictor plate and stock aluminum over flow tank. I run about 130-140 now & no vomitting! :D
I removed the stat & installed a Moroso restrictor plate and stock aluminum over flow tank. I run about 130-140 now & no vomitting! :D
