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Old 01-10-2013, 03:06 PM   #1
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TJ cold weather engine squeal/ whistle

2001 Wrangler TJ with 200,030 miles. My rig is making a very high pitch whistle noise only during the winter months and when the jeep is coasting. At idle it fades away a little but when I accelerate the whistling starts. Spring summer and fall months it doesnt whistle. Just when its cold out. My check engine light is on with miss fire in bank 1. Thinking it's the manifold gasket or headers for both problems or the water pump for the squeal. Can't really tell what area it's coming from bc it's so damn loud. Help needed!

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Old 01-10-2013, 03:36 PM   #2
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mine does something similar when its cold. i start mine and it will whistle/squeal, kind of sounds a little like a tea pot until its warm and seems to go away with more rpms. im thinking mine has something to do with a pulley, just not sure or had time to investigate. as im always in a hurry for work or school when it does it.

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Old 01-16-2013, 09:22 AM   #3
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Mine's been doing the same thing. It's been seriously cold here, (no warmer than 19 during the day and in the negatives at night) and it started doing it last night. No check engine light, no loss of power or any other issue but the noise didn't go away when the engine warmed up. Haven't had this when it's warmer and the noise is really irritating.
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Old 01-16-2013, 11:56 AM   #4
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Mine does something very similar when I first start it up when it's real cold but then goes away once warm and doesn't do it all the time more like a squeak does sound like a pulley but I'm not sure any ideas??
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Old 01-16-2013, 12:04 PM   #5
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2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.
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Old 04-01-2013, 06:36 AM   #6
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Well I replaced the valve cover gasket and intake/exhaust manifold gasket with both fel-pro brand gaskets. Used copper silicone on the manifold gasket, tightened up the bults and no more squeal. Cost me about $40 total for parts and took about 4 hours on a Saturday to complete and this was my first attempt. If I could do it you could also. 4 bolts holding the manifold from underneath were the hardest to get to. Also replaced the foil recall debris heat shield part cost about $5 from dealership. Gaskets I got from rockauto.com, copper silicone from autozone and these are the write ups I followed.

Manifold for beginners - Page 2 - JeepForum.com
[Repair] Exhaust Manifold Replacement Guide

The belt tension and power steeling pump are different. Belt tensioner is on left side and used a 1/2 in ratchet to remove. Steering pump has 2 bolts on top 1 on bottom and easier to use a ratchet by going through the pulley.

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