MARK2842 Posted April 2, 2023 Share Posted April 2, 2023 Hello. I'm new with Mack trucks. I have a 98 ch613 E7-427. It started pushing antifreeze out of overflow hose. I called Mack to question them. And they were good and full of answers, but the wrong ones I think. To this date I replaced the air compressor(per Mack). The water pump,water , pump housing(per Mack),fan clutch, thermostat and reservoir cap. When started it up it pushed about 3/4 gal of antifreeze out. Never went over 190 degrees. Ran it for about 2 1/2 hrr at 1600 rpms. Did bottle test and was getting some bubbles but not all the time. Should I go deeper? I pull a walking floor trailer and haul heavy mulch with it. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
fjh Posted April 2, 2023 Share Posted April 2, 2023 Check for combustion gas in the rad you may have low liner protusion ! 1 Quote Link to comment Share on other sites More sharing options...
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