That's what it sounds like. And it's worse at idle. I'm thinking it could be a belt. Especialy if it's the original of the car. 98 Z with 113k miles on it. Anything else it could be? Doesn't seem to get any worse when the AC is on.

 

might be knock retard.

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1999 Camaro SS A4 Black/Black/Dark Gray w/ Torch Red Hood Scoop and Torch Red Rear Stripe... 3:23 || SLP Loudmouth || SLP AirBox Lid w/ K&N || SLP Bowtie Grille || SLP CAI || SLP SFC || SLP STB || AZP&S Adjustable Fuel Pressure Regulator w/ 3psi Boost || Sullivan Aluminum Racing Pedals || Yank ST3500 || B&M 24K Tranny Cooler || Jet-Hot Hooker LT Headers w/ ORY || Dual 3'' Summit Cutouts || Hypertech 160 T-Stat || SLP Fan Switch || MAF-Translator || 17 x 9.5 Aluminum Z06 Wheels || Nitto 555R's || Macewen White Faced Gauges w/ Red Dash Bulbs & White Shift Selector Overlays || Xenon Headlights.

Me <------- Saving EVERY PENNY from now (Aug. '02) until summer '03 to TURBOCHARGE the SS!!

 

Well, I'm thinking it could be a belt or pulley. I had a similiar sound with my truck and the tension spring was going bad.

 

I've got a similar problem on my 98Z. When the engine is cold, it'll sound like a swarm of crickets in my engine for maybe 5 minutes, then the noise goes away. Although I haven't messed with it, I'm also assuming it's a pulley or belt.

Just need to pickup a can of astroglide before taking it to the dealer.

 

There is a service bulletin on this, I just saw it on LS1.com.

The belt, pulley, and bracket can be replaced to fix the problem.

It is caused by misalignment.

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1983 Monte Carlo, 307 Stroker, TH350, 3.73 10-Bolt - SOLD 8/19/02

Future F-Body Owner

[This message has been edited by BlackHawk T/A (edited August 28, 2002).]

[This message has been edited by BlackHawk T/A (edited August 28, 2002).]

 

It sounds like it's probably the bearing in the idler pulley (tensioner). They do eventually wear out, and with over 100k, it's not unlikely. I don't think they're that expensive either. That's my best guess anyway. If that's not the problem though, maybe you just need some Raid!

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2002 Z28 - A4, 2.73's, Blk/blk, leather, T-tops, sport appearance package - just bought on June 26, 2002! - Pics

1981 Z28 - 383, TH350 trans., 3.42 posi - sold August, 2000 - Pics

1973 Camaro - Dad's & my project in the works - to be built: 355 Chevy, 11.5:1 pop-ups, "camel hump" heads (w/2.02 valves), solid cam, 4-speed.....it should be quick! - Pics

 

Exactly, Blackhawk T/A - that was probably me who posted the TSB. I just got done having it fixed. It's more than just the belt - they end up changing out the alternator bracket, and installing a double-wide idler pulley - exactly right - an alignment problem. Here's the TSB:

Accessory Drive Belt - Squeak/Chirp Noise

BULLETIN NUMBER: 00-06-01-008

SECTION: 06 - Engine/Propulsion System

DATE: March 2000

SUBJECT: Accessory Drive Belt Squeak/Chirp Noise (Install New Double Row Idler Pulley, Generator Bracket and Serpentine Belt)

MODELS:
1998-2000 Chevrolet Camaro
1998-2000 Pontiac Firebird
Built Prior to VIN Breakpoint Y2107225 with 5.7L V8 Engine (VIN G - RPO LS1)

CONDITION: Some customers may comment on a squeak/chirp noise coming from the accessory drive serpentine belt. The noise will be most noticeable at idle and low engine speeds.

CAUSE: The serpentine belt squeak/chirp noise may be caused by misalignment between the idler pulley and crankshaft pulley. A slight rocking motion of the idler pulley causes the misalignment, which results in noise.

CORRECTION: To correct this condition on vehicles built prior to the above VIN breakpoint, install the new generator bracket, double row idler pulley and serpentine belt following Service Manual procedures.

Important: The new generator bracket can be identified by the depth of the idler pulley mounting pilot. The pilot dimension (2) on the new generator bracket is 10 mm. Dimension (2) on the previous bracket was 8.3 mm.

Part#
12563326 - Double Row Idler Pulley Assy
12563327 - Generator Bracket
12562626 - Serpentine Belt

Email me for the diagram. Good Luck!

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'99 Z28 A4 BLACK
▪ SLP air lid, K&N filter, air box mod, Borla exhaust, HPP3, 160* stat, Magnecor 8.5 mm wires, NGK TR55 plugs
▪ Pioneer DEH-P77DH, Polk speakers

 

So if there is a service bulletin. That doesn't mean it's a recall that's free? What kind of expense would this be. Can it be rode as is? Without causing problems.

 

jgkinsofla : It probably was. What's your name over there?

 

I have that same problem, I have already changed the tensioner pulley and the serpentine belt and it didnt help a thing. The squeeking sound that comes from mine is in the area of the left catalytic converter. It kind of shakes and shimmies and makes that chirping sound. I dont know how to fix it though.

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Fully stock 1999 Camaro Z28. I plan to start mods soon.
"99 The Z"

 

I ahve the same deal going on and I had it fixed once a while back. Of coarse the mechanics fix was to put belt dressing on it and tighten the belt.
Thanks for the TSB

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70RS .060over,Hookers,freemods,groundup resto
2000z-28 freemods,Whisper K&N,Flowtech Cutout, Taylor 8mm wires & TR55's, FRA, BMR Strut Tower Brace 13.785 @ 105

 

Are you asking my name? It's Irby Bocksnick.

 

My name's John. It's a different idler pulley (double row idler pulley) and the alternator bracket changes the alignment of the alternator in relation to the other pulleys. If the mechanic didn't know about the TSB, he probably replaced the old idler pulley with the same (part number) new one.

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'99 Z28 A4 BLACK
▪ SLP air lid, K&N filter, air box mod, Borla exhaust, HPP3, 160* stat, Magnecor 8.5 mm wires, NGK TR55 plugs
▪ Pioneer DEH-P77DH, Polk speakers

 

Here's some prices -

Part# Dealer ALL GM Parts (on-line)

12563326 41.26 30.81
12563327 16.18 12.08
12562626 31.25 20.48

S & H 9.95

TOTAL 88.69 73.32

ALL G.M. Parts website -
http://www.parts.com/index.cfm?actio...nt&sfid=213800

 

Let me try this again -

Here's some prices -

Desc / Part# / Dealer / ALL GM Parts (on-line)

Double Idler pulley / 12563326 / 41.26 / 30.81
Alternator Bracket / 12563327 / 16.18 / 12.08
Serpentine Belt / 12562626 / 31.25 / 20.48

S & H - ALL GM Parts - 9.95

TOTAL / Dealer - 88.69 + tax / ALL GM - 73.32