What is this noise?!?!?!?!
Senior Moderator
January 2010 ROTM Winner
January 2010 ROTM Winner
Joined: Oct 2007
Posts: 18,306
From: The 'Burbs of Chicago
Sounds like a dry idler pulley bearing, alternator, or the A/C clutch. Remove the belt as Massey suggested, then run the engine again and listen.
While the belt is off, give all the pulleys a turn by hand and listen for any noise.
It sounds too loud to me for it to be an internal engine noise.
While the belt is off, give all the pulleys a turn by hand and listen for any noise.
It sounds too loud to me for it to be an internal engine noise.
Overdrive Member
Joined: Apr 2010
Posts: 3,354
From: Spanaway, WA
The first camaro we bought had a loud tapping noise at the front of the engine that sounded like something under the valve cover was broken, and that was what we hoped for but once we disassembled it, the piston had marks on the top of it where it had hit the head and made the image of where the head is cut for the valves. The bearing was shot on that cylinder so bad that one half of it had slide under the other half.
That would raise the piston up and cause that to happen. I would have hated to see how bad that crank would have been scored. I think I would have used that engine as a core and just went and bought a rebuilt one from my local part supplier.
Massey
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May 2013 ROTM
Joined: May 2009
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From: Farmington Hills, MI
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A/C Clutch seems like a possibility, since my AC stopped working a week ago (the AC worked fine with the noise for 2 weeks). I have the car sitting at a dealer service shop for diagnosis right now, should have it back around lunch. I told them to take off the belt and check the accessory pulleys, so hopefully that will do it.
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May 2013 ROTM
Joined: May 2009
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From: Farmington Hills, MI
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shop said it's a lifter, but they never removed the accessory belt like I originally asked them to. I told them to do that and see what happens...no word back from them yet.
Fourth Generation Moderator
October 2009 ROTM
October 2009 ROTM
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From: Eastern PA,
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Even if he is wrong I came up with the same thing the dealer did from a crappy movie LOL.If you are wondering what the heck I am talking about go look at WIspartan project thread where he posted the video first.
4th Gear Member
Joined: Jan 2009
Posts: 1,646
From: Knoxville, Tn
I scrapped everything except the block. The cranki had groves in it that made it look like the threads on a bolt.
Overdrive Member
Joined: Apr 2010
Posts: 3,354
From: Spanaway, WA
LOL yea I kinda figured something like that would have happened.
A lifter!? hmmm I have never heard a lifter squeek... AC clutch bearings sure they usually squeek when they are about to die. Not sure if there is an idler available to put in place of the AC comp if you dont want to replace it right away. There is an idler for the 3.4L engine, and the 3.4 and LT1 use the same comp so you may be able to use the one for the 3.4 if you dont have the $$ for a new comp.
Massey
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May 2013 ROTM
Joined: May 2009
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From: Farmington Hills, MI
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I think I'm gonna take the car to a shop to get a 2nd opinion...But I have much bigger issues with my transmission right now which need to get fixed first.
Fancy Sparkle
Joined: Jun 2007
Posts: 1,119
LOL yea I kinda figured something like that would have happened.
A lifter!? hmmm I have never heard a lifter squeek... AC clutch bearings sure they usually squeek when they are about to die. Not sure if there is an idler available to put in place of the AC comp if you dont want to replace it right away. There is an idler for the 3.4L engine, and the 3.4 and LT1 use the same comp so you may be able to use the one for the 3.4 if you dont have the $$ for a new comp.
Massey
A lifter!? hmmm I have never heard a lifter squeek... AC clutch bearings sure they usually squeek when they are about to die. Not sure if there is an idler available to put in place of the AC comp if you dont want to replace it right away. There is an idler for the 3.4L engine, and the 3.4 and LT1 use the same comp so you may be able to use the one for the 3.4 if you dont have the $$ for a new comp.
Massey