23-02-2016, 02:35 PM
Perfectly possible to have HG failure and not have oil/water mixing.
Is the cooling system excessively pressurising? If so, I'd say it's more than likely HG failure and certainly the other symptoms would fit.
I don't know about Mini's particularly, but generally speaking even if the thermostat is jammed closed you should still get coolant flow to the heater matrix. That you haven't suggests that either there's no coolant flow (possible waterpump) or that it's air locking, which together with losing coolant without any evidence of leaking would point towards HG.
To be honest, even if it wasn't a HG failure originally if you've cooked it badly enough that the temperature gauge maxed out then there's a reasonable likelihood that it has warped the head now!
Is the cooling system excessively pressurising? If so, I'd say it's more than likely HG failure and certainly the other symptoms would fit.
I don't know about Mini's particularly, but generally speaking even if the thermostat is jammed closed you should still get coolant flow to the heater matrix. That you haven't suggests that either there's no coolant flow (possible waterpump) or that it's air locking, which together with losing coolant without any evidence of leaking would point towards HG.
To be honest, even if it wasn't a HG failure originally if you've cooked it badly enough that the temperature gauge maxed out then there's a reasonable likelihood that it has warped the head now!
1990 Peugeot 205 GTi 1.9 // 1991 Peugeot 205 GTi 1.9 16v // 1992 Peugeot 205 GTi 1.9 // 1999 Peugeot 306 HDi Estate