New sound when accelerating

Post 807603 by Pauld on 2016-11-27 13:13:40

Hi. The D5 has developed a sort of turbine noise when accelerating. Not gear or speed related but rpm. Vague I know but any ideas? Regards

Post 807604 by M-R-P on 2016-11-27 15:54:26

There's a split/hole somewhere between the airbox and turbo somewhere. Probably the elbow on the rubber pipe on the turbo inlet.

Post 807615 by LeeT5 on 2016-11-28 05:33:42

Do you have excess black smoke or notice a loss in power? I think Martin may be right.

Post 807646 by Pauld on 2016-11-28 21:11:30

No black smoke Still surprisingly nippy! Regards

Post 808716 by LeeT5 on 2017-01-14 09:12:18

Did you find the fault? Small split in turbo hose??

Post 808846 by Pauld on 2017-01-18 09:14:02

Not looked yet, still making the same noise. Need to have a root around when I am not trying to fill the piggy bank!

Post 808943 by davebb on 2017-01-21 10:59:10

Hi Pauld, I would say it is the cold air pipe that fits to the turbo air inlet, I have found that the turbo can over boost if this pipe is split, Dave

Post 809387 by Pauld on 2017-02-04 08:35:12

Had a good dig around yesterday and I think it may be the turbo air inlet pipe. The intercooler pipes are very soft too, and expand significantly when the car is reved. Any ideas where to get replacements and the part numbers. it is a 163bhp E3 regards

Post 809389 by LeeT5 on 2017-02-04 11:33:43

[QUOTE=Pauld;809387]Had a good dig around yesterday and I think it may be the turbo air inlet pipe. The intercooler pipes are very soft too, and expand significantly when the car is revved. Any ideas where to get replacements and the part numbers. it is a 163bhp E3 regards[/QUOTE] If the hoses are rubber than that's totally normal! Replacements will be dealer only, but they sound ok. What makes you think it's the MAF to Turbo pipe? Have you done a smoke leak test? The Plastic MAF to Turbo pipe is prone to cracking and splitting at the neck part which goes around the Turbo flange under the jubilee. They also leak at the PCT nipple (if fitted).

Post 809391 by davebb on 2017-02-04 13:50:19

Hi You can get the turbo air inlet pipe on ebay for about £28 Dave

Post 811527 by Pauld on 2017-05-03 17:37:00

So this has finally been diagnosed as a blown intercooler.

Post 811529 by LeeT5 on 2017-05-03 19:22:41

[QUOTE=Pauld;811527]So this has finally been diagnosed as a blown intercooler.[/QUOTE] Also common. Nice one for finding it.