Racingjunk Forums - Over heating Pontiac 400

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chipper1644

11-05-2009 11:26 AM

Over heating Pontiac 400

I have a over heating pontiac 400. I've went to a aluminum rad. Electric water pump electric fan flushed block removed water drains to make sure its not clogged. 10 to 1 compression, 525 lift cam 280 duration dont know whats left to do. runs up in the 230's.

DirkaDirka

11-05-2009 11:32 AM

Does it have a thermostat in it? If so it may be staying closed. What I would do is take it out and run it to see if it over heats again.

Also are you sure that the water pump is turning? Or is it turning the right direction?

TheYellaBrick

11-05-2009 05:03 PM

How many miles on the engine ?
How long to get that high of temps ?
230 while motating down the road or in traffic ?
Done a coolant system pressure check ? Could be a leaking head gasket.

oldandtired

11-07-2009 06:06 AM

What's your timing set at?
Dave

TS1955

11-07-2009 03:05 PM

Also are you sure that the water pump is turning? Or is it turning the right direction?[/quote]

Possible have the pump wired backwards?

TS1955

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