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High pitched noise after warm up
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92wrangler
New User
Jan 30, 2010, 12:09 PM
Post #1 of 6
(3247 views)
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High pitched noise after warm up
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I have 92 jeep wrangler 2.5L with about 175000 and last couple weeks ive noticed a high pitched noise coming from the engine compartment after driving speeds of 35mph+. It only does it after driving that fast and i slow down to speeds of 20 mph or slower even at idle. It also idles high when it does it. I have a manual transmission so anytime the clutch is in or in neutral it does it after driving the 35mph +. Ive tried replacing the iac valve throttle position sensor cleaned the trottle plate and replaced the water pump and timing chain. Still no solution. Any help would be appreciated.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 30, 2010, 7:21 PM
Post #2 of 6
(3239 views)
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Re: High pitched noise after warm up
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Hmmm? If this only does this when pushing the clutch the throw-out bearing could be the cause. Most growl vs the high pitched noise but they didn't ask me how to make noise, T
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92wrangler
New User
Jan 31, 2010, 8:34 AM
Post #3 of 6
(3227 views)
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Re: High pitched noise after warm up
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yeaaa that is what i was thinkin because it sounds like its coming from the back of the engine too
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92wrangler
New User
Jan 31, 2010, 8:39 AM
Post #4 of 6
(3226 views)
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Re: High pitched noise after warm up
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But it does it when in neutral too like out of gear with the clutch out and even sometimes when it its in low gears going any where from 0 to 20 mph
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 31, 2010, 9:20 AM
Post #5 of 6
(3223 views)
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Re: High pitched noise after warm up
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When you have your foot off the clutch the throw-out bearing is static (just sitting there in wait) and when in neutral with foot off clutch the main shaft of trans is spinning at engine speed. There's a pilot bushing that would be more likely to make a noise as described but should be markedly worse in neutral, sitting still with foot off clutch. That historically is just a bronze bushing to center the transmission's splined input shaft from engine/pressure plate and clutch. None of the timing of the noise is adding up yet. May be something not isolated yet and a mechanics stethoscope or listening rod (careful of moving parts!) would help locate source of noise, T
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92wrangler
New User
Jan 31, 2010, 9:40 AM
Post #6 of 6
(3219 views)
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Re: High pitched noise after warm up
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Yeah ill check it out and let you know what i find. Thanks
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