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Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

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post #1 of (permalink) Old 09-10-2002, 05:25 PM
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Roaring Wrangler

I'm getting a really loud occasional roaring of the engine above 2200 rpm. it happens through all gears and continues to the redline. Sometimes it will ease back into regular engine sound, and when it does this it almost feel as if you were feathering the clutch as when it catches I can feel it pull a bit and the power picks up.
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post #2 of (permalink) Old 09-10-2002, 06:04 PM
 
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Re: Roaring Wrangler

1. What type of engine is it?
2. What year wrangler is it?
3. Auto or Manual?
4. Do you mean that once you get above 2200 rpm it just revs?

Sounds like a slipping clutch to me......but you're kind of vague. Post some more info and maybe the other guys will have an idea.

~Jay
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post #3 of (permalink) Old 09-11-2002, 11:18 AM
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Re: Roaring Wrangler

'01 4.0, manual, above 2200 engine noise doubles, sounds as if an auxillary fan (which it doesn't have) kicks in. Jeep still accelerates but not a clean as below 2200. At times, around 3500 the noise will slowly stop and return to regular engine sound.
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post #4 of (permalink) Old 09-11-2002, 11:23 AM
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Re: Roaring Wrangler

1. Bad Fan Clutch?
2. Loose timing chain?
3. Valves not timed causing sound to be forced into manifolds?

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post #5 of (permalink) Old 09-11-2002, 11:25 AM
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Re: Roaring Wrangler

Dealer couldn't find anything wrong (imagine that). I need to get this fixed asap as lift kit is in the mail and will probably void what warranty I have left.
post #6 of (permalink) Old 09-11-2002, 01:08 PM
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Re: Roaring Wrangler

I'm with LEVE, sounds like the fan clutch.

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post #7 of (permalink) Old 09-11-2002, 01:24 PM
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Re: Roaring Wrangler

I just went thru this on my 258, its a bad fan clutch, did exactly what you describe.
post #8 of (permalink) Old 09-11-2002, 02:55 PM
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Re: Roaring Wrangler

Hey there,

A few have mentioned the fan clutch being bad. Not sure if you're aware how to check or not. Normally (I may not be completely right)how I check is while its not running I grab the fan and spin it. If it spins very easily, or if it has play (front to back) than its bad.

Just thought I would mention my .02 cents since nobody said how to check.
post #9 of (permalink) Old 09-11-2002, 03:28 PM
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Re: Roaring Wrangler

How I figured out mine was bad was pretty easy. I had the engine running, opened the hood and shut down the engine, before the fan quit spinning it was squeaking as it slowed to a stop! [img]images/icons/smile.gif[/img]
post #10 of (permalink) Old 09-24-2002, 01:56 PM
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Re: Roaring Wrangler

For anyone interested, spoke to someone at the dealer that actually drives a Jeep, and his explaination was this was caused by engagement of the "fan clutch lock" which engages the fan at a certain temperature and keeps it engages at a higher speed until the engine cools sufficiently. which would explain the occassional occurance. Unfortunatly this is a temporary loss of 40 h.p. until cooled off enough. Anyone put an electric fan on an 01 tj yet. Any thoughts on these setups?
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