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Topic: 1970 454 Overflow

in Forum: C3 Cooling and Heating Systems


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1970 454 Overflow (1/2)
 4/15/07 4:32pm
BBCorv70
Former Member
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Vette(s):
1970 Coupe, 454, 4 speed

Joined: 4/15/2007
Posts: 1

I have a 1970 couple, 454, 4 speed.
It has an annoying habit of spilling coolant out the overflow tube
after driving for a while, then parking. This seems to only happen
after turning off.
 
This car is configured with the separate expansion tank mounted
on the fender well. The tank and cap have been replaced.
 
When driving, even on a cool day like yesterday, low 40's, I noted
the temp gauge sitting at about 215 or 220. I don't recall seeing
it getting much higher on warmer days though it's been a while
since I've driven this car regularly.
 
It seems odd the overflow would happen after shutting down.
Has anyone else had the same experience? Is this a common
flaw with the big blocks? I could put a recovery tank on but it
seems like a patch to treat a symptom.
 
 
 
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1970 454 Overflow (2/2)
 4/15/07 5:19pm
eddie20875Lifetime Member
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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

as far as i know that would be the only solution is the recovery bottle. when you shut car down water gets hotter as it is not floowing and expands more. probably common no matter what size engine.

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