As title, does anyone know if I can use the same collant type for both the 2.9 Cologne engine and the 3.6 SP6 engine? Need to renew coolant in both and it would be handy just to have 'common' spare.
You can't go by colour alone, ethylene glycol based coolant is available in many colours I have pink,green & blue in glycol
as well as your hoses I'd be concerned with the gaskets that come into contact with coolant, not sure how they'd react to different coolant from original spec.