Reference

1) Noise - Fan noise is sometimes evident under the following normal conditions:

  • When clutch is engaged for maximum cooling.
  • During first few minutes after start-up until the clutch can redistribute the silicone fluid back to its normal disengaged operating condition after overnight settling.

Fan noise or an excessive roar will generally occur continuously, however, under all high engine speed conditions (2500 rpm and up) if the clutch assembly is locked up due to an internal failure. If the fan cannot be rotated by hand or if there is a rough grating feel as the fan is turned, the clutch should be replaced.

2) Looseness - Under various temperature conditions, there is a visible lateral movement that can be observed at the tip of the fan blade. This is a normal condition due to the type of bearing used. Approximately 1/4" (6.5 mm) maximum lateral movement measured at the fan tip is allowable. This is not cause for replacement.

3) Silicone Fluid Leak - The operation of the unit is generally not affected by small fluid leaks which may occur in the area around the bearing assembly. If the degree of leakage appears excessive, however, proceed to item 4.

4) Engine Overheating - If the fan and clutch assembly free-wheels with no drag (revolves over five times when spun by hand), the clutch should be replaced.

How To Tell If A Fan Clutch Is Defective:

1) Check for oil streaks (or dust collected on oil streaks) on the fan clutch - It's a sure sign that the internal fluid that provides the clutch action is leaking.

2) Check for a worn bearing - Grasp the fan blade on either end, with the engine off, and check for lateral movement. If there's more than 1/4" of side-to-side movement, the bearing is worn and the unit needs replacement.

3) Check for proper fan clutch operation - First, run the engine until operating temperature is reached. Next, with the engine off, give the fan blade a gentle spin. If it rotates more than twice, the clutch is worn and needs replacing. If fan rotation is rough or noisy, or the fan fails to turn, the unit is worn out and needs replacement.

Tags: 

Top Jeep Articles

Blog
What Are The Differences In Jeep Trailer Hitch Classes
  • Matt Konkle
  • April 19, 2019
If you have, or are installing, a hitch on your Jeep, then you should know not all hitches are created equal. They have difference classes and not every hitch will meet you needs.
How-tos
How To Safely Tow With Your Jeep
  • Matt Konkle
  • April 18, 2019
While it doesn't have quite the overall tow capacity of a larger truck, your Jeep still can be useful when towing a trailer. Here is what you need to know.
How-tos
How To Do An Oil Change On A 2018 And Newer Jeep Wrangler JL 3.6L Pentastar V6
  • Rob Jarrell
  • April 12, 2019
How to do an Oil Change on a 2018 and newer Jeep Wrangler JL 3.6L Pentastar V6
IMAGE GALLERY
April 2019 Jeeps and Java
  • Matt Konkle
  • April 9, 2019

For April, Quadratec's Jeeps & Java event went out on the road to visit our friends at Jeff D'Ambrosio Jeep in Downingtown, Pa. Good weather also followed, which certainly helped the turnout.

Blog
Jeep Releases 2019 Easter Jeep Safari Concept Lineup
  • Matt Konkle
  • April 8, 2019
Five Gladiators help makeup the six-truck-strong concept field that Jeep is taking to Moab, Utah this year for EJS.
Reference
What Are The Differences In Off-Road Jacks
  • Eric Ammerman
  • April 4, 2019
Forget the factory scissor jack when you go off-road. Other, larger versions will safely get that vehicle up in the air to help with any issues.
Blog
FCA Reports March Sales Drop As Wrangler Again Tumbles
  • Matt Konkle
  • April 2, 2019
Brand tumbles 11 percent against last March thanks to Wrangler, Cherokee and Compass slide.
Blog
Jeep Releases Images Of Two Easter Jeep Safari Concept Vehicles
  • Matt Konkle
  • April 2, 2019
Always a staple during Easter Jeep Safari week, Jeep has released two images of its 2019 EJS concept vehicle lineup.
Blog
Jeep Announces Plans For Two Door Gladiator Truck
  • Matt Konkle
  • April 1, 2019
Automaker reverses stance and says it now plans to bring smaller truck to market.