3 replies to this topic

[Efini611]

Hello everyone! Since summer began (And summer here in Spain is really hot with more than 35C) I have a “minor niggle” with my ‘72 Authi Mini…

 

Everytime I stop the engine after a ride, it burps a little bit of coolant from the rad’s overflow hose…

 

The cap is fine (It’s an aluminium Fletcher rad with no expansion bottle) The coolant level is always fine as I can’t see the fins and the car doesn’t overheat (It runs between 85 and 90)

 

Is this normal or do I have a big issue lurking around?

[cal844]

The cap isn't fine if it's burping coolant.

You ideally want to get the coolant checked for exhaust gas content. If none, change the cap for a new item and also fit a coolant expansion tank at a minimum

Edited by cal844, Yesterday, 05:42 PM.

[Spider]

If you are filling the Radiator to the very top, this is normal. The recommended fill level is about 3/4" (or 20 mm) down from the bottom of the filling neck. Ideally, an over-flow tank should be fitted, this will keep all air out of the system and that in turn will allow your coolant to last longer and also greatly reduce corrosion and rust in the cooling system. It's an oddity that the Minis didn't get one of these tanks until very late, all the other cars in the BL / Rover lone up had one. It's something I've fitted to my Minis and has greatly helped them.

[Steam]

This is usually a sign of a faulty cap.