still whining noise and no boost

wamdogep82

wamdogep82

Lifer
i havnt but the turbo is spinning because you can hear it. thats whats making the whining noise i think when you put your foot down a bit
 
stuart

stuart

Member +
wamdogep82 said:
i havnt but the turbo is spinning because you can hear it. thats whats making the whining noise i think when you put your foot down a bit
Click to expand...

Yeah but exhaust side? silly idea I think but its worth checking?

I'm stumped, hopefully some of the more knowledgable guys will have some input mate.

Hope it gets sorted.
 
wamdogep82

wamdogep82

Lifer
its so annoying. ive been without a car for about 4 days now. i dont no if it will bugger it up even more if i drive it.
 
TurboDave

TurboDave

Member +
Right if we go about this logically either;

There is a boost leak somewhere

The turbo is not producing boost

Are you 110% certain that the wastegate flap is still intact and covering the wastegate hole?

Now you said you have throughly checked, removed and changed pipes so we will rule that out for now.



My advice to you now would be, when its light remove the pipe which is held onto the turbos compressor discharge with 2 12mm nuts,

Rev the car and feel if air is being pushed out of the hole, if it is then the compressor wheel is turning and compressing the air.

The exhaust side would be turning if the compressor wheel is so 2 in 1.

It is possible to have a snapped shaft so that the exhaust wheel would turn and the compressor wheel wouldnt although you would probably have smoke and noises
 
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wamdogep82

wamdogep82

Lifer
the wastegate flap is fine. i have spent hours and hours checking everything. i have had the turbo out about three times. it just dont make sense
 
sx_turbo

sx_turbo

Lifer
disconnect the hi/lo boost button, and bypass the pipes this is what was wrong with mine when i replaced the turbo.

recently when i thought my turb had gone, a nut had come off the down pipe lol.
 
TurboDave

TurboDave

Member +
TurboDave said:
My advice to you now would be, when its light remove the pipe which is held onto the turbos compressor discharge with 2 12mm nuts,

Rev the car and feel if air is being pushed out of the hole, if it is then the compressor wheel is turning and compressing the air.

The exhaust side would be turning if the compressor wheel is so 2 in 1.

It is possible to have a snapped shaft so that the exhaust wheel would turn and the compressor wheel wouldnt although you would probably have smoke and noises
Click to expand...

.
 
TurboDave

TurboDave

Member +
sx_turbo said:
disconnect the hi/lo boost button, and bypass the pipes this is what was wrong with mine when i replaced the turbo.

recently when i thought my turb had gone, a nut had come off the down pipe lol.
Click to expand...


The high low boost solenoid is not going to stop the turbo creating any boost if the actuator harm has some tension.
 
sx_turbo

sx_turbo

Lifer
TurboDave said:
The high low boost solenoid is not going to stop the turbo creating any boost if the actuator harm has some tension.
Click to expand...

well mine would only boost to 0.4bar@5000rpm, till i bypassed the solenoid. i think thats cos the oil and shit stopped it from working when my rings went.
 
TurboDave

TurboDave

Member +
If there is air coming from the hole then the compressor wheel is turning and therefore should be creating boost, even if you had lost a compressor wheel fin it would still create some boost.

Have you swapped the intercooler for a different one?
 
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