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Join Date: Jul 2007
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Engine noise (diesel-like) 318i '93 4cyl

My '93 318i (E36 4cyl 117k miles) makes a rattling engine noise after I run the car hard. The rattling noise sounds like a diesel engine. I've been reading how problems with the VANOS unit will cause a diesel like engine noise, but I'm not certain that my vehicle is equipped with VANOS. Comments appreciated on what could be the cause and cure for the rattling noise.

Old 07-18-2007, 08:57 AM
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Could be a loose timing chain.
Old 07-18-2007, 09:24 AM
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For reference here is the answer I gave in my reply to your email:

I'm pretty sure it does not have vanos.

Sometimes chain slap or chain rattle can be described as a diesel sound. If that is the case it is most likely your chain tensioner which is a very easy replacement.

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Old 07-18-2007, 10:45 AM
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