Many Mazda Bongo coolant header tanks are discoloured making it tough to see the level of coolant in the tank at a glance.
This video shows you how to check the level using a dipstick.
NOTE: If you own a 2.5 TD or V6 Bongo, ensure the cooling system is manually bled if the coolant level has dropped below the level of the lower pipe in the header tank or if you've completed any work on the system. Search on YouTube for videos on how to do this properly, it'll save you a new engine head!
