manolumber Posted January 21, 2015 Share Posted January 21, 2015 2013 CXU with SCR. Noticed what appeared to be exhaust pulsations leaking out of the SCR under the mounting strap along with a trail of soot while regening. Dealer says this is normal to see from a weep hole which is apparently intended to drain condensate from between the inner and outer shell of the SCR? But with a trail of soot? Thanks in advance for any comments. Quote Link to comment Share on other sites More sharing options...
j_martell Posted January 21, 2015 Share Posted January 21, 2015 I'm no expert, but it doesn't seem right.......the granite I used to run never did it....... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment Share on other sites More sharing options...
manolumber Posted January 23, 2015 Author Share Posted January 23, 2015 Any Mack dealer techs familiar with this weep hole? Thanks Quote Link to comment Share on other sites More sharing options...
Macktech689 Posted January 24, 2015 Share Posted January 24, 2015 I have seen steam from water collected in the system coming out from under the front mounting strap before, usually disappears after a couple of minutes. First started noticing this in 2013 trucks. There should not be any soot coming from there though, indicates a problem with the filter or excess smoke being exhausted from the engine. Quote Link to comment Share on other sites More sharing options...
manolumber Posted January 25, 2015 Author Share Posted January 25, 2015 Thanks...that is exactly where it is, under the front strap. The truck is also a 2013. Quote Link to comment Share on other sites More sharing options...
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