Cooling system (and other) issues, with pics! 6v92T

[JackConrad]

The 8V71 in our MC-8 had an overheat switch in each thermostat housing from the factory and 1 temperature gauge sender (in left thermostat housing).  We added a temeperature gauge and sender on the right thermostat housing as well as a mechanical gauge in the engine compartment (connected to right thermostat housing). Also made sure both overheat switches were connected to a working visual AND audible warning at driver's area.  We did remove the automatic shutdown when we replaced all bus wiring.  Jack

[Chopper Scott]

I bought a pair of Murphy gauges and ran one to each side. They are a mechanical gauge with an adjustable temp shutdown needle. I set the temps at 210 and wired them into the original shutdown wiring and eliminated the original shutdown sending units. I have ran it hard enough to hit that temp twice now. It doesn't shut the bus down entirely but makes it lose power off and on and lights up the overtemp light. I probably should run them through a relay to do it correctly but haven't got that far along.

[philiptompkjns]

yup, when I get it  running I need some new instrumentation for sure... I have no way to know how accurate  the factory ones are.

If anyone has any of the parts I might need let me know.

Thanks
philiptompkins@usa.com

[busnut104]

A little ways back in this post, I wrote about my dump truck having a heating problem, Well I installed a new recorded radiator with extra tubes, Cked the water plump was ok. So time to do a test, It still runs on the warm side. So I got my temp gun and cked both sides, it seamed to be about 18 to 20 degrees cooler. I had room on the right beside for another gauge, So I went to the local auto parts store and bought a Stewart Warner gauge. Installed that and now to give it a test. I left the old but new gauge in beside the new SW. the Sw read about 20 degrees cooler very close to my temp gun. Mater of fact I had a hard time getting the temp to 170 degrees, I will test it further but I may have spent 1900 dollars for nothing, but now I have a new radiator. The DD shop said that the gauges that they installed where quality gauges??? After I test a little more I will give them a call and let them know what I think of there so called quality gauges, I think the make was esspro, not sure those, but I will ck and post the make. 

[Dave B]

I was having heating problems with my 8V92 and after new thermostats and cleaning the dirt accumulation on the fins produced only a slight improvement.  Closer inspection revealed a small leak on a tube and that the fins were crumbling when touched. I pulled the radiator and removed the end tanks.  This is what I found, so a new $2,000 core was purchased.  Apparently it had been leaking for quite a while because the bottom bracket was rusted through and there was quite a bit of rust and corrosion in the engine compartment in the radiator area.

Don't have it back in yet but I am hopeful that this was my problem.