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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 12-04-2004, 10:11 AM   #1 (permalink)
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hi...

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 ?

Thx!!
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Old 12-05-2004, 02:18 AM   #2 (permalink)
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anybody???
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Old 12-05-2004, 11:54 AM   #3 (permalink)
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my guess is that it could be one of your pullies making that whinning sound.
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Old 12-05-2004, 11:55 AM   #4 (permalink)
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how does it run when you hear this noise?
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Old 12-05-2004, 12:27 PM   #5 (permalink)
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you may just be hearing the fan in the front of the car, all e36s have those noisy fans, but if its extremely loud and obnoxious its definately not the fan
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Old 12-05-2004, 12:34 PM   #6 (permalink)
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The pulleys might be torqued down too tight, that happened to a friend after we installed his undrive pulleys. Maybe be the belts too???
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Old 12-05-2004, 03:12 PM   #7 (permalink)
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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.
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Old 12-06-2004, 12:45 AM   #8 (permalink)
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Had a similar problem with mine, replaced the upper drive pulley and no more howling.
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Old 12-06-2004, 04:21 AM   #9 (permalink)
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Originally posted by Sagas@Dec 6 2004, 01:45 PM
Had a similar problem with mine, replaced the upper drive pulley and no more howling.
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Thx for all your suggestions.
I'll check on the pulleys right away

The dealer dod mention about some cover having a hole and that the air passing through that hole is making a noise.
But I was not clear on wich cover he meant.

Another thing, is it safe to buy a beemer that already has a top overhaul?
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