99 Cobra making weird sound

1999SVTVert

New Member

Nov 2, 2003

70

0

0

Gainesville, FL

Feb 17, 2004

#1

• Feb 17, 2004

• #1

Lately my 99 cobra has been making a strange noise- It only happens in the morning after it has cooled overnight. When I start it up, it makes a "tsss, tsss, tsss" sound until it gets fully warmed up. Each "Tsss" is about a half a second apart at idle, and varies with RPM. I don't know how better to describe it-

I have two small .wav files, but can't attach them or know of where to host them so I can post a link.

Anyone who has any idea what this sound could be, I would appreciate your insight. It is really starting to worry me. Can't really isolate where in the engine compartment it is coming from-

Thanks,
Adam

PS- If anyone could host them for me, I would really appreciate it- I'll rip them to MP3s, and they should be under 100K each-

 

I

isdnmatt

Founding Member

Mar 22, 2001

368

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0

Smithtown, NY

Feb 17, 2004

#2

• Feb 17, 2004

• #2

Can you hear it inside the car? It sounds like an exhaust leak to me. It may be that as the pipes heat up the expand enough to seal it.

Email them to me at nospam@servematt.com and I'll host them for you.

Matt

 

T

Thunder5.0

New Member

Jul 25, 2003

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0

Feb 18, 2004

#3

• Feb 18, 2004

• #3

When you start the car up have someone check to hear where it's coming from.

 

I

isdnmatt

Founding Member

Mar 22, 2001

368

0

0

Smithtown, NY

Feb 18, 2004

#4

• Feb 18, 2004

• #4

Ok here are the sound clips for you.

http://servematt.com/host/sound.mp3
http://servematt.com/host/sound2.mp3

 

missouri_guy197

New Member

Aug 31, 2002

1,441

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St. Louis, MO

Feb 18, 2004

#5

• Feb 18, 2004

• #5

Sounds like the serpentine belt either slipping while it's cold maybe its deteriorating in one spot...Might want to try replacing it with a new one to see if it goes away...

 

1999SVTVert

New Member

Nov 2, 2003

70

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0

Gainesville, FL

Feb 18, 2004

#6

• Feb 18, 2004

• #6

Thanks for hosting the clips, Matt-
I'll try another serpentine belt and see if that may be the cause- It's really hard to isolate, but I don't think it is coming from the header to X-pipe connections-

 

Hissmann

Founding Member

Sep 5, 2002

243

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0

West Virginia

Feb 18, 2004

#7

• Feb 18, 2004

• #7

I think that it is either the tensioner or Throw out bearing...

 

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Lo Pony

Founding Member

Apr 28, 2002

495

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Atlanta, GA

Feb 18, 2004

#8

• Feb 18, 2004

• #8

Definitely the belt or idler or tensioner pulley. Nothing serious - just change the belt.

 

1999SVTVert

New Member

Nov 2, 2003

70

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0

Gainesville, FL

Feb 19, 2004

#9

• Feb 19, 2004

• #9

Thanks for your help, guys- You pegged it- Changed out the belt last night and it was perfectly quiet on startup this morning-

I wouldn't have guessed that the belt could make that sound, more used to the squealing noises- I was worried it was more of a valvetrain related noise, but it looks like the belt was it-

Thanks,
Adam

 

Hissmann

Founding Member

Sep 5, 2002

243

0

0

West Virginia

Feb 19, 2004

#10

• Feb 19, 2004

• #10

Glad to hear you licked your problem.

 

missouri_guy197

New Member

Aug 31, 2002

1,441

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0

St. Louis, MO

Feb 19, 2004

#11

• Feb 19, 2004

• #11

Good deal...