Question about 2001 BMW 325

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BMW Engine chirping noise

Chirping noise in engine - goes away when the oil cap is removed.

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Sounds like a bad crankcase vent valve located underneath intake

Posted on May 24, 2009

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Posted on Jan 02, 2017

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1 Answer

Where is the filler cap located in my bmw 325i 2002 model


Your question did not specify what "filler cap".
The above response from FTjoe is for the power steering filler cap.

The following RealOEM link is for the engine oil filler cap (Item 4) which is square and black and is on top of the engine. It goes through the plastic cover into the cylinder cover
http://www.realoem.com/bmw/showparts.do?model=ET37&mospid=47720&btnr=11_2172&hg=11&fg=15
25.png

The engine oil filter housing cap (Item 3) is shown below:
http://www.realoem.com/bmw/partgrp.do?model=ET37&mospid=47720&hg=11&fg=30
239.png

Oct 10, 2014 | 2005 BMW 325i Automatic

1 Answer

My 2003 x5 bmw 4.6is, makes a knocking noise in the Engine upon stating it up, but usually goes away after a few seconds.


Sounds like excess bearing clearance, when the engine sits overnight the oil between the bearings and the crankshaft is able to run back into the oil pan. When you first start it up it takes a few seconds for the oil pump to fill the spaces back up and you get some clatter.

Jul 26, 2014 | 2003 BMW 5 Series

1 Answer

I have a chirping noise that starts when I start the car. It used to die down as I would drive, now it's louder and does not go away as before.


The chirping noise is probably a worn belt
You should check all pulleys and belt tensioner for alignment and or looseness
The knocking noise could be an internal engine noise
Which is common for the little 2L engines and I'm just guessing that's what engine you have
Make sure to use a good quality oil filter to prevent oil drain back and also the proper weight of oil
Too thick of oil can also cause this until engine warms up
You should use 5w30 or 10w30
The owners manual may say and sometimes the oil cap will give the recommended weight of oil

Mar 03, 2014 | 2000 Dodge Neon

1 Answer

Whistle noise


Start the car, open the hood, remove the oil filler cap off the valve cover, if the noise goes away, the problem is in the "positive crankcase ventilation" system (blown diaphragm).

Jan 12, 2014 | BMW Cars & Trucks

1 Answer

Noise sounds like a metallic chirp from valve train.


To narrow it down, while the engine is running, don't get near moving parts, you can use a long piece of steel, metal, put 1 end on the valve cover, the other to your ear and listen for rattling. You can move it around to narrow down the source of the noise. It's like a stethoscope but works well. I use a 3' long screwdriver.

Jul 04, 2017 | 1999 Dodge Grand Caravan

1 Answer

2004 ford taurus chirping noise when engine revs


Hello, There are several things which can do this. First, cut off the A/C and then rev the engine as before. If the chirping goes away, the noise was either the A/C clutch or the Serpetine belt slipping with the load. For the A/C clutch, you can try a little rust removal between the drive plate and the pulley with the engine OFF. You can use sandpaper and try to knock off the rust. Then put a little oil on to condition the metal. Then try it with the A/C on.

If the chirp is still there, you have to check bearings on the Pulley tensioner, Alternator, Water pump, and Power steering. It is possible for the Pulley tensioner to have a weak spring or you may have a stretched Serpetine belt. This condition would cause the belt to skip under a load. If the belt is checked with small cracks, just replace the belt. Take off the tensioner and compare the spring tension and wobble in the pulley to a new unit at the Autoparts store.

If still no success, the chirp could be a water pump bearing. The old way off using a piece of wood on the housing of a part while the engine is running is dangerous, but effective. I believe you should have already found your problem before this measure is needed. Dry Serpetine belts make quite a lot of noise and is probably your problem.

I hope my Solution is very helpful to you.

Jun 28, 2011 | 2004 Ford Taurus

1 Answer

My 1997 Malibu is holding up very well. Recently, I have noticed a slight chirping noise whenever I idle (especially after starting the car) and when I accelerate to about 45 or 50. It is NOT a whine...


Remove the serpentine belt notating the direction of travel. Start the vehicle long enough to confirm the chirp is either still present or it has stopped.

If the chirp stops manually spin all the pulley by hand to see if you can duplicate the sound. If nbothing else is making noise and the belt is in good shape put the belt back so that it travels in the opposite direction. If the noise persists replace the belt. If the noise goes away see how long it lasts. I have had many that have not returned after rotating the belt.

One other thing you can try is putting a small dab of di-electric grease on the belt, with the engine off of course. Spread the dab around a little with a finger, again with the engine off. Start the vehicle, give it a couple of seconds to let the grease work around the belt. If the noise goes away replace the belt.

Nov 14, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

Chirping when @3500 to 4000 rpms, 2000 taurus


3500 rpms is about 80 mph. Is this noise in 1st, 2nd & 3rd gear? Is check engine light on?
Chirping could be accessory belt noise. Spray them one at a time with belt dresing to see if it goes away and which belt is doing it.

Dec 16, 2009 | 2001 Ford Taurus

3 Answers

S40 t5, check engine , whistling sound


Read my other posts to the same problem. if the noise goes away with the oil filler cap removed you need to replace the oil filter housing and hose. good luk

Jul 08, 2009 | 2005 Volvo S40

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