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Unread 10-29-2013, 09:03 PM   #1
TheBootlegger
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1995 YJ Wrangler 
 
Join Date: Aug 2013
Location: Montreal, QC
Posts: 107
Engine screaming like it saw something very scary

My 4 cyl just goes nuts when I turn it on.. Loudest screeching, squealing sound evar. I started it for the first time tonight after 4 months of changing a bunch of stuff on it, I expected a rough start, but everytime I turn the key all hell breaks loose. I hear the engine running fine under the loud *** scream though, and it was running great last time I started it. Temperature is under the freezing point most of the time now, and I suspect the serpentine belt or water pump to be the criminals. Is there anything else that could cause such a disturbing, evil, ear shattering sound? Thanks!

note: I started it inside so the squeal might have sounded louder lol

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Unread 10-29-2013, 09:07 PM   #2
SH00T3R
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1987 YJ Wrangler 
 
Join Date: Jun 2012
Location: Boise, Idaho
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Belts, Check the tension on your serpentine. Even check for wet or dryness.
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Unread 10-30-2013, 06:30 AM   #3
SeanB95YJ
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sounds like one of the accessory drive bearings is gone.... my bet would be on the idler pulley, but COULD be alternator, water or PS pumps.
remove the belt and see if any of the pulleys can be wobbled by hand. they SHOULD be rock solid with no noticeable movement. start with the idler which is the pulley that's just bolted to the block, not driving any motor or pump

Good luck
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[FONT="Comic Sans MS"][COLOR="Blue"]Sean B. - Schenectady, NY - 95 YJ, 350/700r4/NP241, JB Shorty SYE, 8.8 rear, 2" BDS, 1" homebrew shackles, Daystar 1" BL, TJ flares, 35x12.50 General Grabber AT2 on 15x10 Bart D-Truckers, Polyshield polycarbonate windshield, HD over/under crossover steering
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Unread 10-30-2013, 09:11 AM   #4
pbmustache
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1993 YJ Wrangler 
 
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The alternators seizes up all the time after they sit for awhile. Take the belt off and spin the pulleys. You should be able to tell which one is bad or seized.
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Unread 10-30-2013, 11:23 AM   #5
TheBootlegger
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1995 YJ Wrangler 
 
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Awesome thanks! I'll check it as soon as I got time.
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Unread 10-30-2013, 08:01 PM   #6
ROTTEN
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1994 YJ Wrangler 
 
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Location: SGF, NY
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Start it with no belt first. For piece of mind. Just for a minute
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Unread 11-03-2013, 07:35 PM   #7
TheBootlegger
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Solved. Alternator was Seized!
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Unread 11-12-2013, 09:45 PM   #8
pbmustache
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That's good news @thebootlegger
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