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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Whistling noise f30 N55
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      12-13-2020, 01:31 PM   #1
Somlo
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Whistling noise f30 N55

after a coolant flush I turn the car on and a super loud whistling noise was coming from down the hood.
I check my pcv with the fire test and was and pcv valve fail.
I changed with the upgrade kit . didn't glue the very top only sides as supposed to be ..
turned the car on and after little warm the whistling noise started again but now 80% less before car had a terrible idle and now is 90% good .
engine shakes a little on idle .
test pcvnwith fire again and passed .. its working well.
I have no oil leaking at all . gaskets looks great.
now I try to open the oil cap when whistling and there is a lot pressure and the whistling go away ..
is it gasket problem ? why I don't have leaking problem? pcv solved 80% to 90%.
by the way car has a fault for valvetronic but when I turn the car on the is no noise coming from the hood as a broken one sounds.
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      12-14-2020, 06:55 PM   #2
Somlo
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Quote:
Originally Posted by Somlo View Post
after a coolant flush I turn the car on and a super loud whistling noise was coming from down the hood.
I check my pcv with the fire test and was and pcv valve fail.
I changed with the upgrade kit . didn't glue the very top only sides as supposed to be ..
turned the car on and after little warm the whistling noise started again but now 80% less before car had a terrible idle and now is 90% good .
engine shakes a little on idle .
test pcvnwith fire again and passed .. its working well.
I have no oil leaking at all . gaskets looks great.
now I try to open the oil cap when whistling and there is a lot pressure and the whistling go away ..
is it gasket problem ? why I don't have leaking problem? pcv solved 80% to 90%.
by the way car has a fault for valvetronic but when I turn the car on the is no noise coming from the hood as a broken one sounds.
update.. just got a video of the noise thats going crazy now ... I found a potential oil leak as well
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      12-20-2020, 09:23 PM   #3
Somlo
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      12-20-2020, 09:25 PM   #4
Somlo
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      12-20-2020, 09:27 PM   #5
Somlo
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https://linksharing.samsungcloud.com/j9rYsLbYvha9


thats the noise
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