engine whine

smokie999 · 15th June 2007, 19:54

my 75 diesel engine has developed a high pitched engine whine from the drivers side .car drives ok no sign of anything amiss other than this any ideas what to look for

Keith · 15th June 2007, 20:07

Is it a constant speed noise or does it vary with engine speed?

you have the belts on that side for various functions plus the turbo itself is drivers side rear
Might be worth taking the wheel arch liner off which may help pinpoint the noise

David3807 · 15th June 2007, 21:45

Thats a coincidence just read this link from .org

http://bavarian-board.com/forum_posts.asp?TID=37607

May have nothing to do with this thread of course.

Ross R75 · 15th June 2007, 21:56

air con can do this too if there is insufficient oil in the refrigerant circuit. Have you tried driving with the climate control in "econ" mode?

smokie999 · 16th June 2007, 16:20

get the whine whether air con on or off

smokie999 · 16th June 2007, 16:22

the whine is a constant from starting up goes up with the engine revs but is more audible in first and second

Ross R75 · 16th June 2007, 21:49

Quote:

Originally Posted by David3807

Thats a coincidence just read this link from .org

http://bavarian-board.com/forum_posts.asp?TID=37607

May have nothing to do with this thread of course.

Thats a different turbo and a different engine. Its still an M47 series engine but its fitted with dual balancer shafts and a Garrett GT1749V turbo with variable vane technology, 150bhp out of the factory. The R75 has a mitsubishi turbo that does not sport VNT. This is why you can get 170bhp+ from nothing more than a remap on a 320D but about 15bhp less on an MG/Rover CDT. The upside is that the R75/ZT has much less of a reputation for eating turbos, a trait that is more common on 320d's than BMW would like to admit.

Quote:

Originally Posted by smokie999

get the whine whether air con on or off

possibly a split in one of the boost hoses then. Check the hose from the turbo to the intercooler and the one from the intercooler to the EGR valve. If there's a small split, it can cause a whooshing, wistling or whining noise.

The mitsubishi industries turbo fitted to our cars is one of the most reliable turbos around. Its not unthinkable but its highly unlikely to be a turbo problem. How many miles has the car covered, what oil are you using and how often does the oil get changed?

smokie999 · 17th June 2007, 09:02

Quote:

Originally Posted by Ross R75

Thats a different turbo and a different engine. Its still an M47 series engine but its fitted with dual balancer shafts and a Garrett GT1749V turbo with variable vane technology, 150bhp out of the factory. The R75 has a mitsubishi turbo that does not sport VNT. This is why you can get 170bhp+ from nothing more than a remap on a 320D but about 15bhp less on an MG/Rover CDT. The upside is that the R75/ZT has much less of a reputation for eating turbos, a trait that is more common on 320d's than BMW would like to admit.

possibly a split in one of the boost hoses then. Check the hose from the turbo to the intercooler and the one from the intercooler to the EGR valve. If there's a small split, it can cause a whooshing, wistling or whining noise.

The mitsubishi industries turbo fitted to our cars is one of the most reliable turbos around. Its not unthinkable but its highly unlikely to be a turbo problem. How many miles has the car covered, what oil are you using and how often does the oil get changed?

oil was changed in feb at the service not sure what they put in the mileage is 33.000

Ross R75 · 17th June 2007, 23:03

Quote:

Originally Posted by smokie999

oil was changed in feb at the service not sure what they put in the mileage is 33.000

Like I said, I wouldn't be too concerned about turbo probs although you can never be 100% certain. The engine will be just about run in at that mileage. Check the hoses I mentioned and also the tension of the auxiliary drive belt.

smokie999 · 18th June 2007, 05:37

will get it checked next sat but I thought the belts where on an automatic tensioner

15th June 2007, 19:54	#1
smokie999 Regular poster mgtf Join Date: Nov 2006 Location: leeds Posts: 91 Thanks: 0 Thanked 0 Times in 0 Posts	engine whine my 75 diesel engine has developed a high pitched engine whine from the drivers side .car drives ok no sign of anything amiss other than this any ideas what to look for

15th June 2007, 21:56	#4
Ross R75 Posted a thing or two Rover 75 Saloon Join Date: Apr 2007 Location: Edinburgh Posts: 1,535 Thanks: 137 Thanked 229 Times in 156 Posts	air con can do this too if there is insufficient oil in the refrigerant circuit. Have you tried driving with the climate control in "econ" mode? __________________ Copperleaf R75 CDT 160

15th June 2007, 20:07	#2
Keith This is my second home ZT400 Join Date: Oct 2006 Location: Ellesmere Posts: 5,948 Thanks: 0 Thanked 43 Times in 29 Posts	Is it a constant speed noise or does it vary with engine speed? you have the belts on that side for various functions plus the turbo itself is drivers side rear Might be worth taking the wheel arch liner off which may help pinpoint the noise

15th June 2007, 21:45	#3
David3807 Posted a thing or two 2002 R75 Conn SE 2.5l Auto Tourer, 2001 R75 Conn SE 2.5 Auto Saloon Join Date: Nov 2006 Location: Gravesend Posts: 1,897 Thanks: 0 Thanked 2 Times in 2 Posts	Thats a coincidence just read this link from .org http://bavarian-board.com/forum_posts.asp?TID=37607 May have nothing to do with this thread of course.

16th June 2007, 16:20	#5
smokie999 Regular poster mgtf Join Date: Nov 2006 Location: leeds Posts: 91 Thanks: 0 Thanked 0 Times in 0 Posts	get the whine whether air con on or off

16th June 2007, 16:22	#6
smokie999 Regular poster mgtf Join Date: Nov 2006 Location: leeds Posts: 91 Thanks: 0 Thanked 0 Times in 0 Posts	the whine is a constant from starting up goes up with the engine revs but is more audible in first and second

18th June 2007, 05:37	#10
smokie999 Regular poster mgtf Join Date: Nov 2006 Location: leeds Posts: 91 Thanks: 0 Thanked 0 Times in 0 Posts	will get it checked next sat but I thought the belts where on an automatic tensioner