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George
George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience:  BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
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2000 BMW 740IL: Loud noise..convertor..rpms but stays..think a pulley

Resolved Question:

2000 BMW 740IL Question...... Loud noise coming from transmission convertor area. The noise comes and goes with rpms but stays with idle. At first you would think a pulley of some sort or belt noise. A much louder noise though. Thank you liz
Submitted: 3 years ago.
Category: BMW
Expert:  George replied 3 years ago.
Pull out the engine oil dipstick while the engine is idling and see if the noise changes. Let me know what happens.
Customer: replied 3 years ago.
Will be trying this in the am. how do i get back to you? Txs Liz
Expert:  George replied 3 years ago.
Just respond to your question and it will send it back to me.
George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience: BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
George and 7 other BMW Specialists are ready to help you
Expert:  George replied 3 years ago.
Hi Liz you did not have to open another question all you need to do is respond back to this question.
Expert:  George replied 3 years ago.
Hi Liz
Customer: replied 3 years ago.
Hi George 1st time using this not familier. George we pulled dip stick out and noise stopped. Vaccum related? Did look up tsb's Crank seals area and howling noise which is right on........ Looked up type of vaccum system on vehicle. Back of engine intake pulled tube off which feeds brake vaccum and y's off to throttle body intake. Plenty of vaccum in engine. Are we on the right track? Thanks liz
Expert:  George replied 3 years ago.

The problem is your Crankcase Vent Valve has gone bad and will need replacement. It is allowing major buildup of pressure inside your engine which will do major damage internally quick. So do not run it unless the dipstick is pulled out so the pressure has somewhere to escape. The noise you are hearing is the pressure inside the engine escaping past the rear main crankshaft seal thats why you have the high pitch noise.

If you give me the last 7 digits of your VIN # XXXXX will look up the part for you.

George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience: BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
George and 7 other BMW Specialists are ready to help you
Expert:  George replied 3 years ago.
DPO9429 Is not coming up as a valid VIN # XXXXX if you can double check to make sure this is correct.
Expert:  George replied 3 years ago.

Liz these should be the correct parts that you need to change, # XXXXX is the Crankcase Vent Valve. You will also need # XXXXX

 

Thank you very much for the Bonus,

George

 

No. Description Supplement Qty From Up To Part Number Price Notes
01INTAKE MANIFOLD109/199811611435361$615.48
02Cover109/199811617501563$78.84
03O-ring20,0X3,55109/199811151736140$2.10
04PROFILE-GASKET109/199811151702291$3.46
05Connector109/199811611741735$11.03
06Blind plug109/199811611704792$9.56
07Vent pipe109/199811611742826$30.86
08Bracket109/199811611704805$1.28
09O-ring12,5X2,0MM109/199811611745195$1.19
10PROFILE-GASKET109/199811611729728$7.54
11PROFILE-GASKET109/199811611729727$7.54
12FLANGE109/199811617506742$43.93
13ScrewM6X251309/199811141460752$0.60
14PROFILE-GASKET409/199811611433328$27.37
15Spacer1009/199811611736648$3.54
16Hex nut with plateAM71009/199807129902630ENDED
16Hex nut with plateAM7 ZNNIV SI1009/199807129905541$0.64

Notes

George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience: BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
George and 7 other BMW Specialists are ready to help you
Expert:  George replied 3 years ago.

Thank you very much again I closed the other question for you so you will not have to worry about it.

George

 

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