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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 05-31-2005, 05:32 PM   #1 (permalink)
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I have just bought a 2001 BMW 520i SE, was first used in Feb 2002, has 65000 miles, the main attraction was the interieur for my wife. There are two concerns I have:

(1) At cold start it has a slight chirping until the engine temperature remains in 50% of the blue zone, after about 50% of the blue zone is exceeded the chirping disappears and the engine sounds like normal. I never heard anything like this with my other cars.

(2) when the engine already well warmed up and I drive at low speeds so that the tyre noise is low and I can hear the engine again, I can hear a hardly audible but still present whooshing (low frequency whistling) with variable amplitude. First I thought I am just imagining it but my wife confirmed it. It is disturbing as I did not hear this with my other cars.

Given the price of the car I am concerned whether these sounds are normal?
I would be eager to know whether these are indicators of problems later to develop. Would be grateful for any comments.

Sandy
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Old 05-31-2005, 07:55 PM   #2 (permalink)
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When engine is cold it is normal to hear the sound of the auxiliary air pump, but not for too long!

If What u described as chirping is in fact a hissing whooshing sounds think air/vacuum/pvc plate leaks.
Chirping as ticking can be injectors sound
Chirping as noise like in a rotating object sounds a pulley related etc....

I say more info. needed plus any check engine light for a code?
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