mackr1989 Posted December 17, 2017 Share Posted December 17, 2017 my 2000 mack rd with a 400 18 speed has a pyrometer temp that is running between 600-900 degrees while accelerating. i put a thermometer gun to where the sensor is in the pipe and it was reading the same as the gauge in the cab. turbo temp was around 725 at the time that i pulled over to check when the pyrometer was reading around 850. the temperature quickly drops while i start slowing down or run the truck around 1300 rpms. gauge says to not exceed 1100 degrees. is my truck running hot? Quote Link to comment https://www.bigmacktrucks.com/topic/51973-pyrometer-temp-seems-high/ Share on other sites More sharing options...
Lmackattack Posted December 17, 2017 Share Posted December 17, 2017 From the trucks I drove it sounds normal to me. as long as it does not go over 1050 I would not worry about it. also depends where the probe is. most are after the turbo. Quote Link to comment https://www.bigmacktrucks.com/topic/51973-pyrometer-temp-seems-high/#findComment-387646 Share on other sites More sharing options...
fjh Posted December 17, 2017 Share Posted December 17, 2017 Yup agree with Trent fairly normal however if you find that temp is coming on faster than normal could be you have a boost leak! Quote Link to comment https://www.bigmacktrucks.com/topic/51973-pyrometer-temp-seems-high/#findComment-387651 Share on other sites More sharing options...
mackr1989 Posted February 7, 2018 Author Share Posted February 7, 2018 if i do have a boost leak, how is the problem fixed and is it expensive? Quote Link to comment https://www.bigmacktrucks.com/topic/51973-pyrometer-temp-seems-high/#findComment-391410 Share on other sites More sharing options...
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