Knocking Underhood

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Knocking Underhood

04-22-2001, 12:26 PM

Cardude

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Join Date: Sep 1999

Location: Atlanta, GA USA

Posts: 281

Does my 1987 300E have a smog pump? If so when and if they start malfunctioning do they get extremely noisy almost to a knock. I'm hoping its not my engine. It doesn't seemed to coming from the water pump either. Any help would be appreciated.

Help,

Cardude
300E 177,000miles

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