Paul1890 Posted August 19, 2017 Share Posted August 19, 2017 Hi I need some help. I cant seem to find anything on internet or from mack I have a 70 U model, with a thermodyne,at least that is what valve cover says. Purchased truck in 83, we did an in frame overhaul on engine in 2004. All parts available from Mack then Was running perfectly, but it knocked out a wrist pin bushing, about 25,000 miles since in-frame. It has a 1-5/8" wrist pin, I don't seem to be able to find these wrist pins or bushings. Mack is no go and PAI also does not show them. I'm a little confused , i thought all Mack turbocharged diesels had 2" pins. Wondered if these parts were still available. This engine does not have wrist pin oil nozzle coolers. Any help would be greatly appreciated. The motor is perfect except for wrist pins, hate to change if we don't have to Thanks again Quote Link to comment https://www.bigmacktrucks.com/topic/50816-help-with-thermo-dyne/ Share on other sites More sharing options...
theakerstwo Posted August 20, 2017 Share Posted August 20, 2017 http://memorialmachine.com/portfolio-item/connecting-rods/ call these people and ask for james. I have used them for many years but not in the last 15years but if they can be found he would know were.Tell him it is a END673 with 18 head bolts head. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/50816-help-with-thermo-dyne/#findComment-377896 Share on other sites More sharing options...
Paul1890 Posted August 24, 2017 Author Share Posted August 24, 2017 Ok thanks will Try there Quote Link to comment https://www.bigmacktrucks.com/topic/50816-help-with-thermo-dyne/#findComment-378290 Share on other sites More sharing options...
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