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Old 08-10-2009, 05:42 PM
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truck over heating 63 chevy pannel

Hi I have a 63 pannelvan 468 gm
when i hit the gas the temp goes like the speedometer up to 180' then when i dropoff the gas it goes down then
if I really get on it it climbs slowly up to 190 or 200
I have a 160' therm (do i need to drill a 3/16 hole like it says in the guide) does it help?
what mix of coolent,and what psi radator cap?
some time drag strip the truck.

I have a elect flexlite fan and a new alum. radator . (24by18)
I allways shut it down when it hits 200 temp
I'm puting alum heads on ,I need so ideas
so I dont fry my new heads.
thanks

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Old 08-10-2009, 06:15 PM
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Um, let me get this straight... 468 as in cubic inches?
Number 1, you have a 160 degree thermostat which cubes that size will never run that cool. I would install a 180 with 1 drilled 3/16 hole.
Number 2, 200 is not hot, and is rather common for a big block. Big blocks are known to run hotter than small blocks. Your not running hot until it reaches 240, then I would worry. The majority of factory engines today run in the 220 range.
Number 3, you don`t have enough fan.
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Old 08-10-2009, 06:20 PM
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so i need to get a clutch fan that runns all the time or clutch
my last engine was a 350
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Old 08-10-2009, 06:27 PM
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I certainly perfer 7 blade thermal clutch fans with the proper shroud for best cooling.
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Old 08-10-2009, 06:30 PM
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thanks for the info
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