Hi. I need to change and refill the cooling system on my 106 2003 Independence. As somebody experience of this as I have heard that some of the heating system hoses are higher than the expansion tank and that this can cause problems with air locks. Apparently one can improvise with a homemade header tank which raises the hight of the coolant in the expansion tank. Or better still buy the proper tool! Anyone know where to buy or the best way to improvise? Hoping that somebody can share their experiences of having done this. Many thanks.