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DiscoWeb Bulletin Board » Message Archives » 2003 Archives - Discovery Technical » Archive through August 01, 2003 » Strange engine rattling noice at different speeds - Disco II 1999 « Previous Next »

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Jorge D. Hinojos (Tenoch)
Member
Username: Tenoch

Post Number: 43
Registered: 02-2003
Posted on Monday, July 28, 2003 - 12:01 pm:   Edit Post Delete Post Print Post

I have noticed a rattling noise coming off the engine when I step on the gas at different speeds. as soon as I release the gas the rattling goes away. it happens at speeds greater than 50 mph.

any ideas??
 

Chris Browne (Chris_browne)
Member
Username: Chris_browne

Post Number: 248
Registered: 02-2003
Posted on Monday, July 28, 2003 - 12:40 pm:   Edit Post Delete Post Print Post

Sounds almost like the engine is pinking...
 

Sandy Grice (Apg)
New Member
Username: Apg

Post Number: 14
Registered: 02-2003
Posted on Monday, July 28, 2003 - 01:55 pm:   Edit Post Delete Post Print Post

Could be rattlin' cats. I've got one.

The matrix in the catalytic converters breaks down and rattles around with age. Mine sounds like a loose washer on a big bolt, and is somewhat dependent upon temperature, like when cold but not hot.

Low tech treatment is to use a drywall screw to try to hold it in place, but then the cat is doomed...might get you a few more week's worth.

Cheers
 

Christopher Boese (Christopher)
Member
Username: Christopher

Post Number: 112
Registered: 10-2002
Posted on Monday, July 28, 2003 - 04:42 pm:   Edit Post Delete Post Print Post

Does sound like something loose in the converter. I had this on my '95, and the tech at my dealer tapped on the cat with a rubber mallet while I listened. You could hear the rattle then, and while driving at various speeds.

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