Mr K

Active Member

• Dec 2, 2023

• #1

Hi
My 2004 TD4 manual has developed a whistle/whoosh noise on acceleration and also when I take my foot off the gas, I’ve check all the hoses (apart from the one out of the turbo) but no leaks or splits.
It runs fine, no smoke or ECU light.
Seems to be getting worse, by that I mean it seems to be starting sooner than it used to.
Any ideas?
Thanks.

 

T

The Pilgrim

Active Member

• Dec 2, 2023

• #2

My guess is the turbo in need of attention.
But the elders will speak.

 

Nodge68

Well-Known Member

• Dec 2, 2023

• #3

Mr K said:

Hi
My 2004 TD4 manual has developed a whistle/whoosh noise on acceleration and also when I take my foot off the gas, I’ve check all the hoses (apart from the one out of the turbo) but no leaks or splits.
It runs fine, no smoke or ECU light.
Seems to be getting worse, by that I mean it seems to be starting sooner than it used to.
Any ideas?
Thanks.

Click to expand...

Have you checked the underside of the top driver's side 90° hose, it rubs through on a badly positioned bolt underneath the hose.

 

Mr K

Active Member

• Dec 2, 2023

• #4

Yea checked that one, in fact I just fitted a new silicone hose which doesn’t rub.

 

Alibro

Well-Known Member

• Dec 3, 2023

• #5

The vac hoses can make odd noises. The one going the the EGR usually wears through but might be worth checking them all.

 

Mr K

Active Member

• Dec 3, 2023

• #6

Thanks but I replaced them all a few months ago.

 

pwood999

Well-Known Member

Full Member

• Dec 4, 2023

• #7

If you take off the turbo inlet rubber pipe, it's possible to grab the turbine & wiggle it to see if there's bearing play.

 

Mr K

Active Member

• Dec 4, 2023

• #8

I'll give that a go.

 

J_D

Well-Known Member

• Dec 5, 2023

• #9

If it sounds like air pressure escaping, it probably is. Check all pressure hoses as a small split can open under pressure. Doesn't need a big split, just like when we whistle.