Fan Clutch Rehab - Heat Gun Mandatory?
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Racer
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Anyone added the silicone fluid without using the heat gun for the rehab process? I've read numerous articles on cooling fan clutch rehab, and none mention heating the clutch up with a heat gun while adding the fluid.
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By the way, I still had to replace my fan. Once I took the fan front apart to put in new fluid, it leaked out pretty easily and eventually made a sticky mess of the fan shroud.
Matt
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I have read other stories about the fluid leaking out after completing the rehab.
Anyone know of rebuilt units available? All I can find are new, $400 - $500.
Are there any other manufacturers fan clutches (VW, Volvo, etc.) that are compatible and more reasonably priced?
Anyone know of rebuilt units available? All I can find are new, $400 - $500.
Are there any other manufacturers fan clutches (VW, Volvo, etc.) that are compatible and more reasonably priced?
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Burning Brakes
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Matt
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The heat source helps. Using a hypodermic helps as well.
There really isn't much disassembly required, certainly none that will cause leakage.
Mark the flat spring across the center, and manipulate it out without bending it. (It is a bimetallic thermal spring that moves the little pin in and out to operate the clutch.)
Here is an old post that you might not have seen. Toyota did have two or three different grades of oil for the fan clutches - I would suggest the thickest version.
http://www.nichols.nu/tip482.htm
There really isn't much disassembly required, certainly none that will cause leakage.
Mark the flat spring across the center, and manipulate it out without bending it. (It is a bimetallic thermal spring that moves the little pin in and out to operate the clutch.)
Here is an old post that you might not have seen. Toyota did have two or three different grades of oil for the fan clutches - I would suggest the thickest version.
http://www.nichols.nu/tip482.htm
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Burning Brakes
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100 weight silicone oil is available at hobby shops. It is used for the shocks on r/c cars. I was able to get a bottle for a couple bucks and it was more than enough for the job.
Matt
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Unless you have solved the leak, I found it a wasted exercise. Toyota MAY still use it, the 2 oz bottle I ordered looked like it had been on the shelf since '85. It usually leaks around the fill pin and mine just continued to do so although I had increased the tension from the metal spring that holds it in; I suppose I'm running cool longer than it would at start up, but no other ill effects that I know of. Electric fans are probably the way to go.
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