Cortina

Rally car is getting a rebuild: Heater has been deleted .... long time ago !!
I notice original builder of the car has looped the connection from the back of the engine - round to the front - via a Y piece ..... etc etc
Is this necessary , or could I simply blank off the relevant connections ??

(I can think of two possible reasons to have a loop : a) air bleed path , b) a water path for the time up until thermostat opens)

Reasons to blank : simplicity , and save a little bit of weight ................... every gram helps !!.

I reaslise the number of you who will have left a heater out of your cars .... is a very small number (the odd race car possibly ?) - so I realise I am asking a very small audience ...... anyways !!

Alan

When the heater valve is closed (all summer for me) there is no circulation. So there is no need for a loop. Maybe a loop seemed easier than capping both ends.

Alan

drooman

No more advice without pictures of the rally car!

Hey_Allen

Someone might have been thinking GM, as their V8 engines seem to require coolant circulation either through the valve or through the heater core.

Rob Edwards

Just block it off, though you might want to add a bleeder hole so you can make sure there are no trapped air pockets in the head(s).

Here are the bleeders in the old Zombie track motor.

FredR

I have no need for a heater over here so run without the heater core connected. I use the stock heater control valve with the actuator arm and vacuum system disconnected. I only open the valve when refilling the coolant. Strictly speaking this should not be required as the block vents through the heads both sides. I found it easier to configure this way.

The valve must be left in the closed condition otherwise the radiator would in effect be partially by-passed!

Cortina

Circuit of Ireland - 2010

Lots of people here will have seen this and the videos before / after .................. so apologies for boring those that have !