Engine cooling fans keep oil temperature within range

Two test runs in near identical conditions demonstrate how Cool My Hog engine cooling fans work to control oil temperature. The forced cooling is directed at the cylinder heads but the entire engine benefits.

Run 1: Cooling fans off.  Ride from Parramatta to Sydney City in morning peak traffic.  Oil temperature sits at over 120°C for the last part of the journey, peaking at 123.4°C.  (On a warmer day and without an oil cooler this could have easily have been over 130°C.)  The Engine Idle Temperature Management System (EITMS) kicked in frequently, at just about every red light.

(Harley states normal operating oil temperature is 110°C – see oil temp gauge fitment guide)

Run 2: Cooling fans on.  Ride from Parramatta to Sydney City in morning peak traffic.  Oil temperature sits between 105°C and 110°C during the last part of the journey, peaking at 110.8°C. EITMS did not activate at all.

Preventing oil temperature going over 120°C – that’s important.

Read about the importance of controlling engine oil temperature at http://coolmyhog.com.au/cooler-engine-oil/