Excessive vacuum from crankcase and whining noise pls help

Robbybombom · 02-24-2021, 04:35 AM

BMW 328i N20 Engine. 118000 miles and excessive vacuum from crankcase and excessive whining noise
Also I've checked all the diagrams of all the n20 engines online and I can't seem to figure out what a certain vacuum hose on top of the engine is for. I've been plagued with problems as of late. I'm trying to get her up and running for a little while before I have timing chain issues. I use Carly to diagnose my car and I'll post some of the codes it's popping. I recently replaced the drive belt and battery. Can anyone help me out?? I'm at a loss I'm a self proclaimed DIY'er and I want to fix these issues myself without going to the dealer. So any feedback would be greatly appreciated

LA1Z24 · 02-24-2021, 04:41 AM

Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.

Robbybombom · 02-24-2021, 05:31 AM

Quote:

Originally Posted by LA1Z24

Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.

Quote:

Originally Posted by LA1Z24

Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.

Yes so currently the diaphragm has a small hose that looks like it runs to the intake box. It's broken. Could that be the issue? It's a vacuum hose because when I turn on the engine the whining sound happens but also the line creates suction. But it's not connected to anything.

njdangelo · 02-24-2021, 06:09 AM

Quote:

Originally Posted by Robbybombom

Quote:

Originally Posted by LA1Z24

Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.

Quote:

Originally Posted by LA1Z24

Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.

Yes so currently the diaphragm has a small hose that looks like it runs to the intake box. It's broken. Could that be the issue? It's a vacuum hose because when I turn on the engine the whining sound happens but also the line creates suction. But it's not connected to anything.

I was going to say this could also be a symptom of a leaking PCV system. I would venture a guess that the broken hose you mention, which is probably the issue at hand, is part of your PCV system. Look the part up on real oem and get a new one. Should be good to go

02-24-2021, 04:35 AM	#1
Robbybombom Registered 0 Rep 2 Posts Drives: F30 bmw 328i Join Date: Feb 2021 Location: CA iTrader: (0)	Excessive vacuum from crankcase and whining noise pls help BMW 328i N20 Engine. 118000 miles and excessive vacuum from crankcase and excessive whining noise Also I've checked all the diagrams of all the n20 engines online and I can't seem to figure out what a certain vacuum hose on top of the engine is for. I've been plagued with problems as of late. I'm trying to get her up and running for a little while before I have timing chain issues. I use Carly to diagnose my car and I'll post some of the codes it's popping. I recently replaced the drive belt and battery. Can anyone help me out?? I'm at a loss I'm a self proclaimed DIY'er and I want to fix these issues myself without going to the dealer. So any feedback would be greatly appreciated
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02-24-2021, 04:41 AM	#2
LA1Z24 Captain 358 Rep 767 Posts Drives: 2014 435i M Sport Join Date: Oct 2020 Location: Long Island iTrader: (0)	Usually the whining is caused by a failed diaphram which is integral to the valve cover. The fix is to replace the cover itself, most times.
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