Had anyone ever used a Prestone AF-Kit Flush 'N Fill on their XKR? I've read people complain about only flushing half of their system. I've used this kit successfully on other cars and it does a great job flushing out all of the crap in the system.

Any thought?

 

That is actually a good question. Not sure if it would be worth the pain of getting to the heater inlet hose and cutting it and installing the connector. I also have used those one cars in the past, usually american V8's. Those had an actual radiator cap and the heaters hoses were easy to get too. Me, I wouldn't attempt it. Maybe someone else would chime in who have actually done it.