E90 Engine rattle under load - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-17-2011, 02:24 PM
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Unhappy E90 Engine rattle under load

I have an 06 320 SI which has developed a rattle from the engine bay only under load when the engine is hot, it does not do it when it is cold.

It may be coincidence but I think it started following an oil change, engine flush through, new front pads & discs by a local mecahnic.

It started off up to 2500 rpm in 3rd and 4th gear a few weeks ago but is now occurring at lower revs as well in all gears, still only under load. It does not tend to happen above 4,000 rpm.

When the noise first appeared a few weeks ago I took it to a dealership who suspected pinking and I now use higher octane unleaded.

No improvement using the new fuel so far (only half a tank so far), in fact it is now rattling under load in 1st and 2nd gear.

Any ideas would be greatly appreciated.

Just had a bad day having to spend 1,700 on new tyres and wheels following a couple of incidents with pot holes!! As soon as I got home from the garage I noticed I had a nail in the new run flat and had to go back and by another one!!!

I have a feeling I am on my way back to the dealership.

Last edited by DazzaT; 01-17-2011 at 02:33 PM. Reason: Additional detail about engine being hot
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