I've recently gone through most of my cooling system, new CSF radiator, Aisin water pump, OEM radiator cap. Did not change out the thermostat because it has been working properly. I also reused the fan clutch that's been in a few years. With the warming temperatures I was seeing water temps around 210F at speeds > 60 mph so I decided to swap in a new fan clutch. I went with the Aisin FCT-049 which is for a 3FE in the FJ80. I've read this is an upgrade over the 2F fan clutch.
Installed the new fan clutch and saw no difference in water temps at interstate speeds. Swapped the old fan clutch back in, which also is a FCT-049 and last was working ok. Today I split open the new fan clutch to replace the silicone oil. I went with 10,000 weight and used one bottle. I also noticed that the fan clutch is adjustable.
The setting out of the box is with the screws set far left in the slot. I loosened and reset to far right. I'll swap the modified fan clutch in later this week to see if these changes make a difference.
The pedestal of the FCT-049 is a sage green.
Installed the new fan clutch and saw no difference in water temps at interstate speeds. Swapped the old fan clutch back in, which also is a FCT-049 and last was working ok. Today I split open the new fan clutch to replace the silicone oil. I went with 10,000 weight and used one bottle. I also noticed that the fan clutch is adjustable.
The setting out of the box is with the screws set far left in the slot. I loosened and reset to far right. I'll swap the modified fan clutch in later this week to see if these changes make a difference.
The pedestal of the FCT-049 is a sage green.