98 S70 T5 intake rattle

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Sep 5, 2010 | 07:25 PM

mcg122

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Joined: Sep 2010

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98 S70 T5 intake rattle

Hi, I'm new to this forum, but not to Volvos. I recently bought a 98 S70 T5 with 206k on it. Second owner, clean, seems to have been well maintained. I've noticed that sometimes on start up there is a buzz, or rattle. It appears to be coming from a cylinder, for lack of a better word, in front of the left wheel well. It has a small, maybe 1" diameter hose going to the air filter. I haven't tried taking it apart because I wasn't sure what I was looking at. Is there some sort of check valve or something in there that would need replacement? My 99 V70 with no turbo doesn't have it so I assume it's turbo related?

Sep 5, 2010 | 07:31 PM

tech

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Joined: Sep 2004

Posts: 36,349

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From: Orlando, Florida

That is the air pump they are known to go bad.
If they work normally it sounds almost like a hair dryer. If it sounds different it might be going bad.