*406 Runs Too Hot*

[AGVI]

I think I should start with

1) Removing the under drive pulleys.
2) Remove the A/C condenser that is blocking air flow to the rad
3) Install the rad seals.
4) Install electric fans
5) Go with a mix of less coolant/more water and some water wetter additive.
6) I know a proper tune can help also.

Anyone else have suggestions?

 

[Vette79]

Have you used an IR Gun to determine the actual temperature of your vette?

 

[bob_robert]

What do you consider Too Hot? What does you temperature gauge read most of the time? I have a 406 in my 78 which is pretty much the same setup as yours. My temp runs around 195' most of the time except when the outside temp is over 100' then it goes up to 210' running @ 75 mph.

The only things I have pertaining to cooling are a heavy duty rad, 160' thermostat with a 1/8" burp hole drilled in it, flex fan and regular coolant with "Water Wetter" added.

 

[petes74ttop]

Start with #3.

You might want to start with #3 Install rad seals, that will help a lot. PG.

 

[KANE]

I think I should start with

1) Removing the under drive pulleys.
2) Remove the A/C condenser that is blocking air flow to the rad
3) Install the rad seals.
4) Install electric fans
5) Go with a mix of less coolant/more water and some water wetter additive.
6) I know a proper tune can help also.

Anyone else have suggestions?

Are you running a stock fan clutch? If so- check it and see if it isn't worn out.

 

[AGVI]

Installed a new one recently.