Successful update!! See Post 18 - Factory fan clutch fluid replacement.
I have two factory fan clutches that were discovered faulty after temp gauge mod and outside temps warming up. I first bought a Hayden unit from Napa and the loud roar was there and temp gauge stayed in the middle. I wanted to try out the fluid replacement so I picked up two bottles of RC diff fluid, one 40mL of 6K, 50mL of 10K. Drained and filled one bottle in each of the clutches. Tried the 10K first, outside was 70-80 at first the gauge was 1/3 for an hour trip and I thought life was grand. Then the next trip it went up to the bottom of the red, into the red if I push it, slight drop if I turn off A/C and slightly more if I run heater, wouldnt drop unless I idled in P/N or turned it off. A/C did not cut off, still cool. Tried the other cluth, again got a slight roar at start up, initial low temp, then running hot with no clutch engagement.
I put the tops in the oven and the ports opened but maybe at too high temp? What am I doing wrong? Can the unit itself just be bad? BTW these are standard late clutches, NOT blue or black hub. All test driving done on hilly roads at least an hour trip each time, little extra weight, usually the red zone was towards the end of the hour trip. I read the clutch fluid replacement threads and everyone seems to have success with it, I can't figure out what I ddi wrong, please help! TIA!!
I have two factory fan clutches that were discovered faulty after temp gauge mod and outside temps warming up. I first bought a Hayden unit from Napa and the loud roar was there and temp gauge stayed in the middle. I wanted to try out the fluid replacement so I picked up two bottles of RC diff fluid, one 40mL of 6K, 50mL of 10K. Drained and filled one bottle in each of the clutches. Tried the 10K first, outside was 70-80 at first the gauge was 1/3 for an hour trip and I thought life was grand. Then the next trip it went up to the bottom of the red, into the red if I push it, slight drop if I turn off A/C and slightly more if I run heater, wouldnt drop unless I idled in P/N or turned it off. A/C did not cut off, still cool. Tried the other cluth, again got a slight roar at start up, initial low temp, then running hot with no clutch engagement.
I put the tops in the oven and the ports opened but maybe at too high temp? What am I doing wrong? Can the unit itself just be bad? BTW these are standard late clutches, NOT blue or black hub. All test driving done on hilly roads at least an hour trip each time, little extra weight, usually the red zone was towards the end of the hour trip. I read the clutch fluid replacement threads and everyone seems to have success with it, I can't figure out what I ddi wrong, please help! TIA!!
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