[Healeys] radiator over flow problem

[John Harper]

Sam

Is it possible that you fitted a type of thermostat without a venting 
'jiggle pin'?

I had this problem many years ago. What happens is that with the 
thermostat fully closed and no way for a small amount of coolant to move 
around the system and allow warm coolant to reach the thermostat bellows 
the thermostat doesn't open.

The coolant then boils inside the head. This cases back pressure and 
forces coolant out of the radiator overflow. Eventually steam or hot 
coolant will get to the bellows and they will open.. The system then 
operates normally as you describe.

I suggest that you have a look to see that you have the correct type of 
thermostat fitted.

Regards


>New problem for Healey guys and gals. As my 100-4 is warming, I get a sudden
>gush of Antifreeze from (I assume) the over flow.The engine has just been
>rebuilt. About a 1/2 quart ends up on the floor. I let the engine continue to
>run, didn't overheat. It has done this several times. Any ideas?
>Thanks,
>Sam
>_______________________________________________
>ah at jharper.demon.co.uk
>
>Healeys at autox.team.net
>http://autox.team.net/mailman/listinfo/healeys

-- 
John Harper