Grand Wagoneer Fan Blade/Viscous Fan

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Yes that fan clutch easily, or it should be easily, unbolts from the waterpump. You might have to move the fan shroud out of the way. Not sure if I disposed of my low mileage fan clutch from my '82 Wag 360 that I bought just before I retired my Wag.

OK, so if the fan clutch "wobbles" on the shaft, then simply replacing the fan clutch and not the water pump is fix? I cannot as yet see how the fan clutch separates from the fan, but will figure that one out by inspecting the fan.

Many thanks!

Upon closer inspection, I was able to see how the clutch unbolted from the water pump and did so, replaced the fan clutch, and, unable to locate a new or used fan shroud on short notice, managed to MacGyver the old one by re-installing it, and using old friend Gorilla Glue to fuse the cracked fan housing together!

Jeep now purrs like a kitten, no ratting of the fan striking the fan housing--fan steady as a rock.

I do have one question though: The new fan clutch milled attachment plate, where it bolts to the water pump, is about 1/4 inch thicker than the old one. As a consequence, the studs are not long enough to come all the way through the lock nuts. I can see the stud a fraction short of emerging from the hex nut, but have always been told that the stud should protrude beyond the nut. They do have lock washers, and they are on there very tight, but is this something to be concerned about?

Thanks again!

Sometimes the studs thread on both ends and will work back. But I'm at a loss as to why the plate would be 1/4" thicker. Considering this is a vibration area and a loose fan can eat your radiator for lunch, I'd at least put some blue threadlock on the nuts. Also watch the radiator to fan clearance. You don't want fan flex to munch the rad.

I don't know why the mating plate is thicker. This one has the slots instead of bore-through holes. I do worry about anything that is not properly installed, and I have long believed that studs should go all the way through the nut. These are close, but I believe you should see two or three three threads protruding. I could take the fan clutch off and grind it down some, but I don't want to unbalance any part of it.

LONGER STUDS!!! Using Blue Locktite is good too for safety! ;-)

I don't know why the mating plate is thicker. This one has the slots instead of bore-through holes. I do worry about anything that is not properly installed, and I have long believed that studs should go all the way through the nut. These are close, but I believe you should see two or three three threads protruding. I could take the fan clutch off and grind it down some, but I don't want to unbalance any part of it.

Can I remove the studs from the frontspiece of the water pump and replace them with ones another 1/4" - 1/2" longer?

Yes! You can use 2 nuts and lock them together on the stud which will basically make that stud a bolt which you can use a wrench on the inner nut to remove the stud. ;-) Give it a try and let us know!

Can I remove the studs from the frontspiece of the water pump and replace them with ones another 1/4" - 1/2" longer?

I replaced the studs, but now the fan will not turn at start-up-- squeals and it smells hot. Before I replaced the studs and reinstalled the fan, the fan turned smoothly and quietly.

too long.

You bound the pump and caused the belt to slip.

When replacing studs always check to make sure the fan turns freely. Somtimes they have to be cut down a few threads.

Doug--

OK, that's what I had begun to suspect as I was pondering over the change in behavior. The water pump is not turning.

Do you recommend removing the studs and cutting them off by 1/4"?

Thanks very much.

use a bit of wire to measure the depth of the threaded sections and to check just how far back you go before hitting metal.

The old studs should also give you a good idea how far they went in.

OK. Will do.

This all started with a new fan clutch that was milled thicker than the OEM part. I'm worried now that any stud length that will work with the new thicker fan attachment plate will be too long. I'll know in the morning.

Thanks very much again, for all the help.