HD Cooling for YJ 4.0
Awhile back, I was looking to improve upon the electric fan set up I had on my 05 LJ Rubicon. It was unreliable; having failed once in the Arizona heat and once around town. These failures were both due to the relays and wiring, but I was not confident in the system after that, and decided I wanted to go back to a factory mechanical fan.
After researching several threads, I came across one that used a 9-blade Ford Explorer fan and an HD Fan clutch. After buying a new MOPAR radiator, the proper HD fan clutch for my LJ and the Reverse rotation 9-blad fan, fresh fluid and a MOPAR thermostat, the LJ temp stays at just under 210 on the factory gauge. This was true in Death Valley in July at over 120°, and the entire Rubicon Trail Trip in June. Along with excellent cooling, I have found that, when compared to the 5-blad fan of my friends TJ, the 9-blade fan was a lot quieter.
Gathering parts for my daughter's YJ 4.0 swap, I decided to see if I could provide the same HD Cooling for hers. After some research and speculation, I ordered the "AC Equipped" Fan Clutch for the 98 TJ engine I am using (as HD as I could find and the same will fit any 4.0 YJ) and the same 9-blade reverse rotation Ford fan. My concern is that the fan blade center opening would not fit over the stud base of the YJ fan clutch, as my LJ has the screw on style fan clutch. I took a gamble and ordered the parts.
The parts came in today and I immediately set about to see if it would work. It appears as if this set up will work. In the pictures below, you will see the fan blade on the fan clutch, as well as the part numbers for anyone thinking this may be a good fit for their build.
FAN: 620-112
Price: $25.99
Fan Clutch: 922737
Price: $36.99
I will report back once I have it installed. My fear is that I will need to find a more robust fan clutch, but I do not know this to be true at this time.
Awhile back, I was looking to improve upon the electric fan set up I had on my 05 LJ Rubicon. It was unreliable; having failed once in the Arizona heat and once around town. These failures were both due to the relays and wiring, but I was not confident in the system after that, and decided I wanted to go back to a factory mechanical fan.
After researching several threads, I came across one that used a 9-blade Ford Explorer fan and an HD Fan clutch. After buying a new MOPAR radiator, the proper HD fan clutch for my LJ and the Reverse rotation 9-blad fan, fresh fluid and a MOPAR thermostat, the LJ temp stays at just under 210 on the factory gauge. This was true in Death Valley in July at over 120°, and the entire Rubicon Trail Trip in June. Along with excellent cooling, I have found that, when compared to the 5-blad fan of my friends TJ, the 9-blade fan was a lot quieter.
Gathering parts for my daughter's YJ 4.0 swap, I decided to see if I could provide the same HD Cooling for hers. After some research and speculation, I ordered the "AC Equipped" Fan Clutch for the 98 TJ engine I am using (as HD as I could find and the same will fit any 4.0 YJ) and the same 9-blade reverse rotation Ford fan. My concern is that the fan blade center opening would not fit over the stud base of the YJ fan clutch, as my LJ has the screw on style fan clutch. I took a gamble and ordered the parts.
The parts came in today and I immediately set about to see if it would work. It appears as if this set up will work. In the pictures below, you will see the fan blade on the fan clutch, as well as the part numbers for anyone thinking this may be a good fit for their build.
FAN: 620-112
Price: $25.99
Fan Clutch: 922737
Price: $36.99
I will report back once I have it installed. My fear is that I will need to find a more robust fan clutch, but I do not know this to be true at this time.