M47 Diesel Engine Whine / Whistle On The Overun - Page 13

Jules · 8th October 2011, 13:18

No any fuel pressure disappears after 10 seconds of engine off.
I find it far easier & quicker to remove inlet manifold, leaving starter in place.

boe · 1st November 2011, 16:04

Quote:

Originally Posted by Jules

I've replaced 2 HP regs on 2 different Cars in last 4 months.
Only new genuine type were used and no resonance noise from either of them .........so far !!

did they have the noise before you changed them ???

boe · 1st November 2011, 16:06

Quote:

Originally Posted by Jules

It's a shame Kestis1 has not posted any more on this (only 3 posts total) as we will never know if his repair lasted or not !!

i have tried the repair kestis1 suggested and it does not work noise is still there

Jules · 1st November 2011, 20:22

Quote:

Originally Posted by boe

did they have the noise before you changed them ???

Indeed they did.
Kestis hasn't replied to any questions since so we don't know if his solution lasted

T16 · 18th November 2011, 13:26

Quote:

Originally Posted by Jules

A quick DIY test is to turn the ignition off while still in gear driving along
(obviously where it's safe to do so)
This removes the power from the ECU & hence the fuel regulator.
If the whine stops immediately, (but engine still rotating without power) you know its fuel resonance.

Perfect, I will try this today.

Did we establish that the sound seems to originate on the drivers side? Im sure I read a couple of people suggesting it..?

EDIT:- I should add, I only get the noise when its warm too... from a cold start and in cold weather, its silent as a mouse.....

Jules · 18th November 2011, 18:21

Yes and HP Reg is on drivers side!
But resonance travels and can appear to be coming from elsewhere.

Bit like the common fault of Tourers with roof resonance at 1800 RPM, which we all thought originally was rear exhaust silencer!!

T16 · 18th November 2011, 18:25

Went down a long hill in 2nd gear..

Kept the revs high.. Wailing was there.

The instant the ignition was turned off, wailing stopped.

I get the feeling that if it had been an alternator or tensioner, the noise would still have continued.

In addition, the pitch would go up and down with the engine, this wailing/droning stays the same pitch no matter what.

Hence my "tuning fork" description.

Id love to get rid of it, it ****** does my head in. Under the bonnet though, with the engine cover on, it really does seem like its coming from the drivers side.. of this there is no doubt. But we all know how hard it is to trace sounds!

Jules · 18th November 2011, 18:28

£150 for the Reg plus fitting should sort it

Bigcul1 · 24th May 2012, 14:13

just a quick response on this, I had my HP pump replaced with a second user 2002 pump. Whine has ceased. My pump was leaking though so needed to be done however getting rid of the whine is a nice bonus.

bobf · 30th June 2012, 10:59

Strange - mine only appeared when I replaced the HP pump!

Bob

8th October 2011, 13:18	#121
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	No any fuel pressure disappears after 10 seconds of engine off. I find it far easier & quicker to remove inlet manifold, leaving starter in place. __________________ [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

18th November 2011, 18:21	#126
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	Yes and HP Reg is on drivers side! But resonance travels and can appear to be coming from elsewhere. Bit like the common fault of Tourers with roof resonance at 1800 RPM, which we all thought originally was rear exhaust silencer!! __________________ [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

18th November 2011, 18:28	#128
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	£150 for the Reg plus fitting should sort it __________________ [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

18th November 2011, 18:25	#127
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	Went down a long hill in 2nd gear.. Kept the revs high.. Wailing was there. The instant the ignition was turned off, wailing stopped. I get the feeling that if it had been an alternator or tensioner, the noise would still have continued. In addition, the pitch would go up and down with the engine, this wailing/droning stays the same pitch no matter what. Hence my "tuning fork" description. Id love to get rid of it, it ****** does my head in. Under the bonnet though, with the engine cover on, it really does seem like its coming from the drivers side.. of this there is no doubt. But we all know how hard it is to trace sounds!

24th May 2012, 14:13	#129
Bigcul1 Gets stuck in Rover 75 CDTi Con SE Join Date: Jul 2011 Location: Northallerton Posts: 846 Thanks: 123 Thanked 131 Times in 91 Posts	just a quick response on this, I had my HP pump replaced with a second user 2002 pump. Whine has ceased. My pump was leaking though so needed to be done however getting rid of the whine is a nice bonus.

30th June 2012, 10:59	#130
bobf Regular poster Rover 75 Tourer Join Date: Jan 2007 Location: Coventry Posts: 35 Thanks: 0 Thanked 0 Times in 0 Posts	Strange - mine only appeared when I replaced the HP pump! Bob