I look into a used 320i M52 today.
The engine looks fine except the following problem:
It has a really really loud whistling noise when the engine is running.
It was quite 1st time we start it up, but after it warm up then the whistling sound came...even while we drove it.
The sound was so loud that we can even hear it with the hood closed and in a busy street!!!
any idea what the problem is guys??
Also, what is top overhaul?
should I consider buying a beemer that already has top overhaul ?
That could be possible because a warm engine will have slightly more tension on the belts than a cold one because of expansion. But on the other hand, the belt will become more elastic as its temperature rises.
AMG can't build an NA engine that can compete with M engines, so they stick in a supercharger and say their cars are faster. BMW could simply do the same, but they don't out of principle.</span>
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