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Hissing sound from engine. Is this normal?

 
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Old 21 Jun 2011, 10:17 pm
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Default Hissing sound from engine. Is this normal?

Wasn't sure if this is normal engine noise, I haven't had the car too long. But I hear like a hissing noise when engine is on. Could it be exhaust leak? Car drives normal.

2002 LE model - 80k miles
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Old 21 Jun 2011, 11:01 pm
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Default Re: Hissing sound from engine. Is this normal?

Try looking for any cracked or damaged vacuum hoses, particularly from the UIM to the engine.

Take off your modesty cover, (says dohc 16v) its pretty easy and turn on the car and listen around.

Commonly pts in our year model start to have wear on the vacuum lines. In fact tomorrow ive got to replace one on the right side of my uim going into my engine, ends are starting to deteriorate.

Easiest way is to run the car, lift the hood and listen around and squeeze hoses in the sound area looking for cracks or nething odd
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Last edited by Dill; 21 Jun 2011 at 11:04 pm.
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Old 23 Jun 2011, 02:57 pm
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Default Re: Hissing sound from engine. Is this normal?

Yes, the hose that connects to the manifold and valve cover is cracked on the ends. Thanks for the tip.
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Old 24 Jun 2011, 04:36 pm
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Default Re: Hissing sound from engine. Is this normal?

What is a UIM?
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Old 24 Jun 2011, 05:31 pm
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Default Re: Hissing sound from engine. Is this normal?

Quote:
Originally Posted by HYE_PTC View Post
Wasn't sure if this is normal engine noise, I haven't had the car too long. But I hear like a hissing noise when engine is on. Could it be exhaust leak? Car drives normal.

2002 LE model - 80k miles
yes this is fine as your pt sounds like its got a special edtion viper engine
lol
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Old 24 Jun 2011, 07:33 pm
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Default Re: Hissing sound from engine. Is this normal?

Quote:
Originally Posted by mperkins37 View Post
What is a UIM?
Upper Intake Manifold
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