This Tech Tip, one in a series we publish for the industrial diesel engine community, focuses on Deutz Model 1011 and 2011 thermostats. It follows earlier Foley Engines Tech Tips on these popular 1011, 1011F and 2011 Deutz engines. See for example
- Tech Tip #83: Deutz Diesel Crankshafts: A Cautionary Note;
- Tech Tip #86: Deutz Fuel Systems: Identifying The Correct 912 Series Fuel Injection Pump;
- Tech Tip #90: Six Things To Know About Deutz 912 & 913 Liners and
- Tech Tip #234: Changing Your 1011 & 2011 Timing Belt.
Deutz Models 1011 and 2011 engines are widely used in concrete saws, aerial lifts, stump grinders and other applications. Like most engines, they require regular maintenance and filter changes. One element of these engines that is a little different is that they have a timing belt that should usually be replaced every 800 hours or so. Since they are “interference engines”, if the timing belt breaks or even skips it can cause the valves to hit the cylinder head.
We’ve noticed a common issue with with Deutz 1011 and 2011 thermostats. They are installed horizontally and can easily be installed backwards which can result in no oil pressure and the disastrous and expensive results of running an engine without sufficient oil.
But we use a simple saying to remember the correct way to install the thermostat. As the saying goes for Daylight Savings Time: “spring ahead, fall back”. In this case, the first half is all you need for 1011/2011 thermostats too! Just keep “spring ahead” in mind.
Below are two photos showing the correct and incorrect installation of the thermostat. We urge you to take care when changing thermostats on the 1011 and 2011 Series Deutz Diesel Engines and insert the thermostat spring first.
Deutz Part Number: 4179928
