LCR....shreiking noise when on full boost...

[DOLBY]

ever so lately when i give my car the full beans, at say 3500 rpm their is an awful shreiking sound coming from the turbo. It almost sounds like a supercharger ....im slightly worried it could be a sign the turbo is on its way out, but its more likely a pipe may be blocked or coming loose...

also, in the last few days after a bit of a thrash (and after letting the car cool down) the radiator fan seems to be making a horrible squeaky sound....are the two related?...

any help appreciated...

 

[Jimski]

Sounds like it could be a collapsed boost pipe/silicone hose? Have you ever used a cheaper alternative from ebay?

Sometimes these warm up, become maliable and collapse under the vacuum, the shriek would be the air squeezing through!



Jimski

 

[DOLBY]

mine are all forge mate.....also i have noticed no loss in performance, just that noise......

any info on the radiator noise?

 

[Feel]

K04 cars do shriek when boosting, particularly if you hoof from low down in the revs.

 

[DOLBY]

cheers phil, but it never did this when i bought it back in 2006....

 

[mrwookie]

Noises like these Bret??
http://www.seatcupra.net/forums/showthread.php?t=231151

Mine turned out to be the pipe coming off the turbo of the turbo had just slipped the edge off and it was a Forge one. Worth a look......

 

[ArosaRacer]

when i had this on my LCR it was the dump valve, gave it a clean and service and it never happened again

 

[DOLBY]

Noises like these Bret??
http://www.seatcupra.net/forums/showthread.php?t=231151

Mine turned out to be the pipe coming off the turbo of the turbo had just slipped the edge off and it was a Forge one. Worth a look......

sounds similar ed, but its not that prominent.....more second gear boosting as it doesnt happen at motorway speeds etc.....

any ideas with the squeaky radiator after i have turned the engine off?

 

[jonathanp]

squeaky radiator might be your auxiliary water pump on its way out. Might also be possible that the noise from your turbo could be down to the compressor touching the side of the casing.

 

[DOLBY]

squeaky radiator might be your auxiliary water pump on its way out. Might also be possible that the noise from your turbo could be down to the compressor touching the side of the casing.

cool, thanks for the headsup jonathan,
its due a service shortly so im sure it will be fine till then...

 

[richybigman]

Check the pipe from turbo to charge pipe, i have a forge one and the jubilee managed to come loose on the turbo which caused a screeching noise.

 

[CupraMVR]

On full boost does it sounds like a kettle whistling???

if so i would take your TIP off and try and look inside the housing. could be 1 of the blades has bent and is off balanace making the noise. seen it a few times

 

[sportbilly]

I remember when I had a lound screeching noise all of a sudden - then I got the turbo replaced

 

[Willie]

I had this with my DV top being loose and allowing the diaphgram to lift at lower pressure sounding like a cavitating pump

 

[markbrum]

i had the noise your on about.... week later new turbo required...well was in my case sounded like a siren was amusing at first till i found out the cost of a new turbo , but hope yours is something else mate good luck...

 

[225]

After I had mine remapped it shrieked sometimes when pressing on, something to do with turbine blades or something according to revokev.

 

[DOLBY]

thanks people, plenty of info there to think about and to sort out.....i dont think the turbo is on its way out though as the car still shifts when it wants to...

any idea how much the auxillary water pump is to get replaced or is it fixable?

 

[Rocky Rocastle]

new secondary pump is about £75 and in some instances in can be repaired using electrical contact cleaner and a hell of a lot of fiddling, it's not hard just not a good job if you have stubby fingers

 

[mrwookie]

thanks people, plenty of info there to think about and to sort out.....i dont think the turbo is on its way out though as the car still shifts when it wants to...

any idea how much the auxillary water pump is to get replaced or is it fixable?

This may help Bret.....

http://www.seatcupra.net/forums/showthread.php?t=129762

 

[CupraMVR]

the 1 we had in had a bent blade sounded like a kettle goin off but still had the power.

just the shaft is out of balance and makes the noise

im trying to get the pic we got of it