Thermostat Replacement

twopopper · Apr 17, 2016

Ok guys, going to put new thermostats in the 930 diesel this week. I have the double thermostats with the 4 bolt housing and the three with nuts are loose, but the bolt that goes into upper housing is STUCK!!! Sprayed it with PB blaster and will let it soak a few day! 3 questions, if it does not come loose, do I heat it, and what do I do if the bolt breaks off? I have been told to drill a small hole in each thermostat, is this necessary when the tractor has a thermostat by-pass hose?
Thanks!

Case Nutty 1660 · Apr 17, 2016

this Always works for me when you have a steel bolt /fastener in cast iron, heat the head of the bolt Very cherry red,,,, WALK away until its completely cold, then turn out the bolt
cnt

Dune Country · Apr 17, 2016

yup, heat up the head, let it cool.
Lately I have been testing any thermostat I install in boiling water, just to be sure.

Thermostat Replacement

twopopper

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Case Nutty 1660

Well-known Member

Dune Country

Well-known Member

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