I have a 2004 CX613 Mac truck and am having a lot of problems in past 3 years, but more persistant problems in past 3 months, with the top plastic antifreeze tank. This is the tank I add antifreeze to, and it continues to crack and leak. I replaced it in January, we had a problem after 1 month and was given a new tank which now 2 months later is cracked again and leaking antifreeze. The original tank came with a 15 # cap, now when we purchase a new tank it came with a 10 # cap, which did not work so we put on the 15# cap and it seems to work good but the tank keeps cracking. I am not sure what is wrong? any suggestions? Thanks.
