Quick tutorial on how to refill your viscous fan clutch with proper fluid and reseal the chamber.
NOTE: This fix will NOT help if your fan clutch is mechanically worn, or if the thermal valve is stuck closed or open.
Silicone oil used in this video:
http://www.rcplanet.com/Kyosho_Silicone_Oil_5000_p/kyosil5000.htm?codesf=4012476105&gclid=CI2ypaPZuMkCFYI_aQodzRMD7w
The fan clutch featured in this video is from a 2002 Suzuki XL-7 V6:
https://www.youtube.com/playlist?list=PLVsGvNkPZC6ovCedbyH9yHkXdoPr4nNWp
Thanks for watching!