M47 Diesel Engine Whine / Whistle On The Overun - Page 8

Jules · 23rd January 2011, 15:06

Can't imagine it's the Gauze filter as many brand new 75's I delivered back in 2005 had the same whine.

Ian G · 24th January 2011, 08:57

Quote:

Originally Posted by Jules

Can't imagine it's the Gauze filter as many brand new 75's I delivered back in 2005 had the same whine.

Is there a possibility of something being moved/tightened when changing the filter and the cure happened by accident so to speak.
Ian

Jules · 24th January 2011, 09:01

I wish I knew!
Of all the "claims" of a cure no one has posted exactly what was done

e668ecp · 24th January 2011, 09:47

Mine did it then suddenly just stopped

trebor · 24th January 2011, 11:25

my 2005 facelift CDTi has been doing this for ages, i thought it was connected to the clutch at first, but now i have come to accept the whine and no longer tune into it, would be great to get a fix though

flyer_phil · 24th January 2011, 15:08

Well what is the difference between the fuel system on the early mk1's and the late mk1's and mk'2's. That is the question!

Was there an identifiable change on the fuel system when they did this cost reduction exercise around late 2003? That is the question!

There must be some difference because its only the mk2's and a few of the late mk1's that are effected - like mine for instance its a 53 plate mk1, one of the last before the facelift, and mine definitely does it.

This is correct isn't it Jules, non of the early cars do it?

Or is it nothing to do with the fuel system? Perhaps we should make a list of all the differences and then go through the list step by step and reduce it to a short list, and then do some substitution tests.

Peter_Plowman · 17th February 2011, 19:47

I have recently changed the high pressure fuel pump on my ZT135 manual. No webasto heater and has in-tank and under-bonnet fuel pumps. Now I have the whine described in this thread and it is driving me mad.
Pete

r44712 · 18th February 2011, 16:15

I think you may have inadvertently found the root of the noise!

From what I've seen (but not always the case) by using the 'instantanious fuel economy' feature on the hidden OBD menu, is that the fuel-supply is cut off when it's whining (so fuel being saved)....

Jules · 18th February 2011, 17:19

Did you change it together with the cylindrical HP fuel regulator attached to the pump?

As i recall someone (possibly on this thread) changing the regulator and the noise disappeared

Peter_Plowman · 19th February 2011, 18:03

Does the fuel pressure regulator have an electrical connector? If it does, then I can maybe swap it with the one from the original pump which I have still got. How do you remove the regulator?

23rd January 2011, 15:06	#71
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Can't imagine it's the Gauze filter as many brand new 75's I delivered back in 2005 had the same whine. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

24th January 2011, 09:01	#73
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	I wish I knew! Of all the "claims" of a cure no one has posted exactly what was done __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

24th January 2011, 11:25	#75
trebor This is my second home Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190 Join Date: Jun 2007 Location: Coven Posts: 12,528 Thanks: 526 Thanked 1,877 Times in 885 Posts	my 2005 facelift CDTi has been doing this for ages, i thought it was connected to the clutch at first, but now i have come to accept the whine and no longer tune into it, would be great to get a fix though __________________ www.midlandsnanomeets.co.uk Robs Car Gallery Coven near Wolverhampton WV9 2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver) 2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver)

18th February 2011, 16:15	#78
r44712 Loves to post ZT-T+ 135 & ZR+ 115 Join Date: Dec 2006 Location: N.E. Hampshire Posts: 398 Thanks: 1 Thanked 0 Times in 0 Posts	I think you may have inadvertently found the root of the noise! From what I've seen (but not always the case) by using the 'instantanious fuel economy' feature on the hidden OBD menu, is that the fuel-supply is cut off when it's whining (so fuel being saved).... Last edited by r44712; 18th February 2011 at 16:18..

18th February 2011, 17:19	#79
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Did you change it together with the cylindrical HP fuel regulator attached to the pump? As i recall someone (possibly on this thread) changing the regulator and the noise disappeared __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

24th January 2011, 09:47	#74
e668ecp I really should get out more....... Range Rover Evoque and ZT V8 SE Join Date: Feb 2007 Location: Yorkshire Posts: 2,232 Thanks: 20 Thanked 37 Times in 34 Posts	Mine did it then suddenly just stopped

24th January 2011, 15:08	#76
flyer_phil Loves to post Rover 75 CDT Classic, 2003, Moonstone Join Date: Mar 2008 Location: Chesterfield at the moment Posts: 411 Thanks: 0 Thanked 1 Time in 1 Post	Well what is the difference between the fuel system on the early mk1's and the late mk1's and mk'2's. That is the question! Was there an identifiable change on the fuel system when they did this cost reduction exercise around late 2003? That is the question! There must be some difference because its only the mk2's and a few of the late mk1's that are effected - like mine for instance its a 53 plate mk1, one of the last before the facelift, and mine definitely does it. This is correct isn't it Jules, non of the early cars do it? Or is it nothing to do with the fuel system? Perhaps we should make a list of all the differences and then go through the list step by step and reduce it to a short list, and then do some substitution tests.

17th February 2011, 19:47	#77
Peter_Plowman Newbie MG ZT Join Date: Feb 2007 Location: Stevenage Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	I have recently changed the high pressure fuel pump on my ZT135 manual. No webasto heater and has in-tank and under-bonnet fuel pumps. Now I have the whine described in this thread and it is driving me mad. Pete

19th February 2011, 18:03	#80
Peter_Plowman Newbie MG ZT Join Date: Feb 2007 Location: Stevenage Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	Does the fuel pressure regulator have an electrical connector? If it does, then I can maybe swap it with the one from the original pump which I have still got. How do you remove the regulator?