320 CDI engine noise - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 03-24-2006, 12:42 PM Thread Starter
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320 CDI engine noise

Hi Every one
Here's an odd one ! e class 320 CDI engine noise.must be - engine hot,between 1000-1500 rpm and under light load.It makes an awful metalic rattle but out side these conditions no a sound! runs fine?One garage said they had heard it before-dont worry does'nt do any harm leave it alone !!!.I do not like all the noise sounds like it's going to blow up.any ideas how to fix it-many thanks
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post #2 of 4 (permalink) Old 03-24-2006, 03:22 PM
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RE: 320 CDI engine noise

Harmonics--something's vibrating.

Probably a metal line or exhaust pipe or something, i.e. not engine parts.

Kent Christensen
Albuquerque
'07 GL320CDI
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post #3 of 4 (permalink) Old 03-25-2006, 09:23 AM
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RE: 320 CDI engine noise

If the sound is like a loose piece of tin more than likely it's a loose heat shield or sound deadening panel.

It takes effort to find noises like this, something most mechanics aren't interested in doing.

DB
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post #4 of 4 (permalink) Old 03-26-2006, 10:36 AM Thread Starter
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RE: 320 CDI engine noise

It's the owner-thanks for your replys,but i have done further investigation it is resonance of the block in relation to number 1 cylinder-i have also found out that merc know all about it and cover it up as there's no fix.I did hear some cars were bought back by merc-any one know details-lemon law ?
many Thanks
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