TimberJack Posted June 7, 2016 Share Posted June 7, 2016 Having to replace turbo on my 2004 CH 427. The turbo I took off has 631GC5176DM3X part number and the one Mack said should be on it is a 631GC5171AMX. What are the differences between the two? Quote Link to comment https://www.bigmacktrucks.com/topic/45560-turbo/ Share on other sites More sharing options...
mrsmackpaul Posted June 8, 2016 Share Posted June 8, 2016 To new for me to be of any help sorry Paul Quote Link to comment https://www.bigmacktrucks.com/topic/45560-turbo/#findComment-335882 Share on other sites More sharing options...
Mickey603 Posted June 8, 2016 Share Posted June 8, 2016 (edited) Casting changes were made to the turbocharger. These changes, which include additional material added to the upper front mounting stud flange and to the spiral section of the turbine housing, were implemented to prevent cracks from developing in the housing. See Bulliten Here Edited June 8, 2016 by Mickey603 Quote Link to comment https://www.bigmacktrucks.com/topic/45560-turbo/#findComment-335885 Share on other sites More sharing options...
TimberJack Posted June 8, 2016 Author Share Posted June 8, 2016 Thanks Micky for the info. Quote Link to comment https://www.bigmacktrucks.com/topic/45560-turbo/#findComment-335927 Share on other sites More sharing options...
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