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  #1  
Old February 11th, 2005, 08:48 PM
bjenk
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Brian Jenkinson
1994 D90
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Click...Click...Click...

I have a constant click from the the front of the engine. It sounds like it is coming from the viscous fan. It is a click, not a whine like bearings. Fan blades are not hitting anything. I can hear it softly when listening to the water pump shaft with a screw driver. I called rovers north and they said it was a viscous fan going. I drove it until temp. was normal and then shut it down. I then spun the fan and it had no resistance, and no click to it. At cold temp. the fan has resistance. Anyone ever have this distinct clicking? My plan is to remove the viscous and start the truck and see if the clicking is gone. Thanks for all the help and good info.
brian
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  #2  
Old February 11th, 2005, 10:03 PM
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Mike Hippert
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94 D-90 Grinding Rover
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Sounds about right, when mine died it did the same thing (well I never heard it ticking), hard to turn when cold then easy to turn when hot. Pulling the fan is a good way to be sure.
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Old February 11th, 2005, 11:15 PM
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Brian Jenkinson
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Mike, can't remember while reading through all the searches about viscous fans, did you go with a flexlite electric fan? If so, any problems?
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  #4  
Old February 11th, 2005, 11:27 PM
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Yup! I did, and even though I have drowned itin mud a few times they work great. I once tested it to see how well it worked, on a warm night I switched them off while the engine was running and I was parked, I let the temp get up to 3/4 and then I switched them back on. In almost no time they brought the temp back to 1/2.
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  #5  
Old February 11th, 2005, 11:30 PM
bjenk
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Brian Jenkinson
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thanks mike
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  #6  
Old February 12th, 2005, 06:37 AM
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James
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How about a stone in your tyre
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  #7  
Old February 12th, 2005, 04:50 PM
bjenk
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Brian Jenkinson
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Nope, no stones, has not seen dirt in a while, just some snow to convince me that I need better tires (tyres).
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  #8  
Old February 12th, 2005, 05:12 PM
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Chris Davis
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Possibly a sticking lifter or noisy rockers. Never heard of a viscous making a ticking although the folks at Rovers North are pretty damn knowledgable.
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  #9  
Old February 13th, 2005, 01:41 PM
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Bradlee Duncan
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Yeah ^^^^^ that's what I was going to say. When our viscous went out, it didn't make any clicks. Our disco did make the classic lifter/pushrods/rocker arm clack though. That could be your problem. Try the "screwdriver trick" on the valve covers or go buy a stethoscope and check it out.
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  #10  
Old February 13th, 2005, 06:10 PM
bjenk
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Brian Jenkinson
1994 D90
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Thanks bradlee and chris for the help, but everything under the valve covers sound good...I will post what I find when I take off the the fan...I hope that will solve it.
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  #11  
Old February 15th, 2005, 09:05 PM
bjenk
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Brian Jenkinson
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Well, I found the click. It was the inner pulley (AC drive pulley) attached to the water pump. I took the viscous fan off (holy cow, it was on there) and then spun the water pump pulley as fast as I could and still had the click. Took the pulley off and found that the inner pulley was cracked into pieces where the three bolds held them on the water pump shaft. (See Pictures). Thanks everyone for the input on possibilities.
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