This Foley Engines Tech Tip helps people identify the differences between two similar Deutz engines. For example, the F4L1011F and the F4M1011F share a very close model number, but they are very different engines. While these two engines are both four cylinder, naturally aspirated (i.e. non-turbo) 1011F engines, there are important differences between the “M” and the “L” nomenclature. The M Series is often called the water-cooled version and the L Series is often called air-cooled. This is not completely true since both engines are oil cooled. The difference lays in the location of the oil cooler. The “F” stands for “integrated cooling”, while the “M” is external cooling.
Both the L and the M versions of this engine have engine serial numbers stamped into the engine block. In most cases the stamped-in number is to the left of the oil filter housing, towards flywheel housing.
But maybe your application doesn’t allow you to see your data tag or the stamped engine serial number easily; don’t want to get your khakis in an uproar. Below is Foley Engines’ handy cheat sheet on how to tell these engines apart from one another.
- “L” Engines: The L engines have an integrated oil cooler on top of the engine. They will have a cooling air blower fan and housing mounted to the top left-hand side of the front of the engine. These engines will also have cooling air ducting bolted to the engine to help direct the cooling air flow up and out of the integrated oil cooler covering the injection pumps.
- “M” Engines: The M engines still have an oil cooler, but this is often supplied by the equipment manufacturer and they are often mounted within the engine bay instead of directly on top of the engine like with the L engines. These coolers will be supplied oil from the engine via easily visible “hydraulic” style hoses. Additionally, the cooling fan on the M engine is usually mounted directly to the crankshaft pulley with a hub, but it may also be mounted to the front of the engine with a central console that is bolted to the front of the engine in some cases.
Without the engine serial number we can’t identify every component on your engine, but by knowing the Series (i.e. 1011F), the number of cylinders, naturally aspirated vs. turbo, and L vs. M, we will have a good start. With this information we are able to identify the common parts that don’t vary by equipment application so we can get you the right parts the first time so you can get back up and running.
If you need a little more detail on were to locate your serial number for you engine, the following tips will help: Tech Tip #199: Deutz Engine Serial Number Locations Made Easy.
We hope that this Foley Engines Tech Tip has been helpful. We believe that Tech Support Matters and publish this ongoing series of Tech Tips for the industrial engine community. We welcome your feedback. To contact us directly, email us at info@foleyengines.com. Need parts for your engine, you can check out our website for some of the most common parts, but if you don’t see what you need we stock much, much more so don’t hesitate to call us at 800.233.6539 or e-mail us at info@foleyengines.com. Need a replacement engine? Let us know what you need and we will get back to you with options.
