Topic: turbo whistles twice as loud (Read 1992 times)

karlsburgers · « **on:** March 02, 2008, 22:18:20 »

hi, whilst driving my turbo started to whistle twice as loud. it did'nt seem to affect the performance but just doesnt sound right. its a dicco 200 tdi in a defender. ive changed all pipes that relate to the turbo, ie; new allisport pipes, but it still sounds the same. i'd be greatful for any suggestions, thanks.

diesel_jim · « **Reply #1 on:** March 03, 2008, 13:20:28 »

Could be the inlet/exhaust manifold gasket leaking.

try carefully nipping up the nuts that hold it all onto the side of the cylinder head, but it could be that it's "blown through" and will need relpacing.

that or the turbo itseld is knackered. remove one of the pipes into it and grab hold of the impellor. it should only have a couple of millimeters free play. if it rattles like a rattly thing, then it's time for a new one.

Range Rover Blues · « **Reply #2 on:** March 03, 2008, 17:17:11 »

They also whistle if the turbo boost gets turned up, or oddly when you clean them :-.

Tommo · « **Reply #3 on:** March 03, 2008, 23:23:51 »

yeah in the past we have bought turbos for the nissans that feel in good nich and once you clean em all out and run some fresh oil through they are slack as awt, they get a manky gungey film in the bearing pack which seems to keep it functioning well lol.

jimthelandyman · « **Reply #4 on:** March 03, 2008, 23:35:35 »

They also sound really loud when you run a 19j turbo on a 200 tdi don't they tom :lol: :lol: :lol:

Tommo · « **Reply #5 on:** March 03, 2008, 23:42:57 »

it gets to 1 bar so im not complaining!

Range Rover Blues · « **Reply #6 on:** March 04, 2008, 04:03:57 »

A bit of damage to one of the fins could be another cause :-k

karlsburgers · « **Reply #7 on:** March 05, 2008, 20:09:13 »

hi, it looks like its more than 1 fin damaged, any idea what could have caused that. cheers.

Range Rover Blues · « **Reply #8 on:** March 06, 2008, 04:58:32 »

Unless the bearing has gone and the fins have hit the casing then something has gone through the turbo :-o

karlsburgers · « **Reply #9 on:** March 06, 2008, 17:52:24 »

sounds worrying. my mate is going to flush the engine and give it an oil change then change the turbo, hopefully that should sort it. i'm just concerned about how something got in there in the first place.

Sharpshooter · « **Reply #10 on:** March 06, 2008, 19:16:52 »

If your old intercooler hoses had perished, and delaminated inside. This could cause damage to the fins.

diggerdog36 · « **Reply #11 on:** March 06, 2008, 22:16:56 »

Quote from: karlsburgers on March 05, 2008, 20:09:13

hi, it looks like its more than 1 fin damaged, any idea what could have caused that. cheers.

Sounds stupid but water can damage turbine blades like stones can. Depending on your air filter set up, if water could get through it could easily cause bent blades, especially when its spinning at 20,000 rpm.

Tommo · « **Reply #12 on:** March 06, 2008, 22:19:44 »

I work for cummins turbo technologies and some turbo's spin up to 100,000 RPM. crazy eh.

Range Rover Blues · « **Reply #13 on:** March 07, 2008, 07:07:47 »

That's why they can't have roller bearings :-.

Landyash · « **Reply #14 on:** March 07, 2008, 10:39:01 »

Sounds daft but have you checked inter cooler pipes for splits??

Ash ;)

diggerdog36 · « **Reply #15 on:** March 07, 2008, 13:12:55 »

Or the intercooler???

Tommo · « **Reply #16 on:** March 07, 2008, 20:49:57 »

Quote from: Range Rover Blues on March 07, 2008, 07:07:47

That's why they can't have roller bearings :-.

you should see some of the stuff they have in R&D though, absolutely fantastic kit coming in the future.

some of our turbos also come with a million kilometer warrenty as well. impressive eh?

Range Rover Blues · « **Reply #17 on:** March 08, 2008, 05:29:05 »

That's pretty good yes, though I suspect that's for trucks and locomotives where cold starts will be few and far between :-k

Muddy · « **Reply #18 on:** March 08, 2008, 18:31:48 »

Do you have a 'performance' air filter?

Xtremeteam · « **Reply #19 on:** March 09, 2008, 17:02:52 »

Quote from: Range Rover Blues on March 07, 2008, 07:07:47

That's why they can't have roller bearings :-.

if you cant have roller bearings why do you get rollerbearing turbos as an upgrade?

hybridised turbos with 360 roller bearings mean more booosht captain

Range Rover Blues · « **Reply #20 on:** March 09, 2008, 19:46:41 »

And how long do they last ;)

Rolling element bearings do not like excessively high speeds or rapid changes in speed. Nor are they big fans of large changes in temperature.

If roller bearings were better, do you not think they would be fitted in all turbos? the only advantge must be to reduce the drag of the oil film in a journal bearing.

karlsburgers · « **Reply #21 on:** April 18, 2008, 12:22:47 »

hi, thanks to every one for your input, its all sorted now, the impellor was chewed up some how so i was lucky to have a second hand one, fitted it and alls well. cheers.

News:

AuthorTopic: turbo whistles twice as loud (Read 1992 times)

diesel_jim