thom2and Posted August 18, 2012 Share Posted August 18, 2012 I have a 2008 Mack with the MP8, 485 hp, and about 40,000 miles. Lately it's been asking for a regen every couple of days. During the regen process the exhaust temp doesn't go over 600*F. I've been told the 7th injector needs cleaning. I'm wondering if anyone knows how to do this. Also, is a gasket kit needed to reassemble? Any help is appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/26858-2008-mp8-7th-injector-cleaning/ Share on other sites More sharing options...
staxx Posted August 18, 2012 Share Posted August 18, 2012 Yes you will need a kit to reseal, 2 hold down bolts and the 2 gaskets remove the 2-- 5/16 bolts careful not to break lift injector up remove gaskets use a soft tooth brush and some carb cleaner and carfuly clean end of injector reinstall gaskets and bolt put some antisieze on the bolt and u will be good to go.Just be very careful not to break the 2 bolts. Quote Link to comment https://www.bigmacktrucks.com/topic/26858-2008-mp8-7th-injector-cleaning/#findComment-133932 Share on other sites More sharing options...
staxx Posted August 18, 2012 Share Posted August 18, 2012 The 7th injector is located after the turbo it has 2 coolant line attached to it and a fuel and later models air line the 2 bolts going down into diffuser pipe are the ones you need to remove. Quote Link to comment https://www.bigmacktrucks.com/topic/26858-2008-mp8-7th-injector-cleaning/#findComment-133934 Share on other sites More sharing options...
thom2and Posted August 19, 2012 Author Share Posted August 19, 2012 Thanks for the input. Quote Link to comment https://www.bigmacktrucks.com/topic/26858-2008-mp8-7th-injector-cleaning/#findComment-134100 Share on other sites More sharing options...
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