rbetcher Posted April 29, 2016 Share Posted April 29, 2016 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. Quote Link to comment Share on other sites More sharing options...
DCR Posted April 29, 2016 Share Posted April 29, 2016 Get the metal replacement tank. Much better than the double plastic tank, only one tank 1 Quote Denny330-550-6020A "Mack Pack" Charter Member Link to comment Share on other sites More sharing options...
TimberJack Posted May 3, 2016 Share Posted May 3, 2016 I had the same problem with my 2004 CH and I went with the one piece tank that's metal. 1 Quote Link to comment Share on other sites More sharing options...
turckster Posted May 3, 2016 Share Posted May 3, 2016 All mack grey engines take a 10 lb cap unless it is an aset ac engine, it has a 16 lb cap with the metal upper coolant tank. Quote Link to comment Share on other sites More sharing options...
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