Originally Posted by DonM

I put a ‘Taxi heater control valve’ on my ‘82 4/4.
It seems to work fine.

£14.50 on eBay.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F202736344035


Yes I'm sure that would work fine on an earlier engine. I guess the modern equivalent with four way valve is to not upset the overall coolant flow on current prissy engines irrespective of heater setting.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone