Talbot Express Motorhome Heater Matrix Will it leak

Heater matrix components. How the heater matrix works. Heater fan repair. How the heater goes together. Heater matrix repair. Heater matrix bleeding. Heater matrix leak repair. Heater control valve.
Talbot Express Peugeot J5 Citroen C25 Fiat Talento
2.0lt 2Lt 2 Litre Petrol