3200 turbo - hissing noise?

[stevenM]

hi folks

after a track day my 3200 now has a nice hissing noise over 2500 (normally you do hear the turbos but only 2500-3000 then the engine noise takes over but now there is a constant and loud hissing).

is this something like a loose / split hose?

haven't had a look yet but i'm thinking this will need to be accessed from underneath the car - anyone have any experience of doing this?

many thanks

steven

[stevenm]

well, had a look at the car and indeed the top hose (from turbo to intercooler pipe) on driver side has been damaged (it sits very close to exhaust and when car rev's the engine kicks over a small amount and the exhaust almost touches the pipe.

it looks like an awkward pipe to gain access to!

[stevenm]

ordered a new pipe £55

[nigelo]

stevenm said:

well, had a look at the car and indeed the top hose (from turbo to intercooler pipe) on driver side has been damaged (it sits very close to exhaust and when car rev's the engine kicks over a small amount and the exhaust almost touches the pipe.

The "pipe" you refer to is actually a right-angle connector sleeve which slides onto the compressor outlet and is held in place by a jubilee style clip. The other end of this sleeve receives the steel pipe that connects to the intercooler via another sleeve. You can see this quite clearly (item 12) in Eurospares diagram on their site here

If it is almost touching the manifold, then its not been fitted properly and despite its heat proofing will quickly burn through.

hope this helps

[stevenm]

hi nigelo

thanks for your help. not sure on the correct fitment - it looks like I'll have to do a lot of work just to get at the pipe at the weekend. Is this a job to be tackled from the top of the car or from underneath?

some photos of the damage...

http://s98.photobucket.com/albums/l25

[wicked1]

The pipe you are talking about is simpleish to take off the turbocharger but the black metal pipe goes under the front of the car and joins the intercooler, is a nightmare because you may need to remove it off the intercooler. To do this you will need to drop the front undertray, which is awkward and the nuts below the radiator snap if you are not careful. I would suggest trying to remove the pipe off the turbocharger and then sliding the rubber hose off the black metal pipe and avoid disconnecting the pipe from the intercooler.

Access is a pain but try and remove the airfilter box carefully as well which can help you see what you are doing - good luck.

[stevenm]

hi wicked1

many thanks for the help - hopefully if the part arrives today i can tackle it this weekend. not looking forward to it :-(

cheers
steven

[stevenm]

well, approx 4 hours later and a lot less skin on my hands i've completed the job.

i'll post a full write up later in case anyone else has to tackle the job - the fact that the hose practically touches the exhaust must mean this happens often?!?

[stevenm]

this is a pain in the ass job - you need hands half the size. try and find an 8 year old mechanic to do this for you.

remove front undertray
disconnect hose to intercooler
remove air box
remove relay box beside airbox (just move to the side)

from underneath the car loosen the two jublee clips holding turbo outlet hose. this is difficult to say the least and technique depends on orientation of the clips! i really long screw driver got one of them and the other was loosen with a spanner (my arm up round the back of the steering arm!)

once loosened pull the metal intercooler hose free and out under the car. then remove the flexible hose. this is also fiddly due to lack of space.

now, place a jublee clip over the turbo outlet and fit the new flexible hose to this from above and tighten (use a tiny bit of fairy liquid to ease hose onto connector but not loads - dont want the turbo blowing bubbles!). now, feed the metal hose up from under the car and you will probably need someone else to fit the flexible hose from above. i tried fitting the flexible to the metal hose and then to the turbo but this proved impossible!

the rest is all the reverse...

BTW - i did all this using the scissor jack - life would be easier using a ramp or lift.

steven

[nigelo]

stevenm said:

the fact that the hose practically touches the exhaust must mean this happens often?!?

The only fact Steve is that the flexi connector "practically touches" the manifold on YOUR car. I say again that if this is the case, then there is something wrong with the fitment. On my 3200, there is a gap of 5mm / 6 mm (approx 1/4" which is as one would expect.

hope this helps

[wicked1]

Just a small point that did scare me, please don't tell me that you got under the car with a scissor jack and the car unsupported. This is a very dangerous thing to do and i wouldn't advise anyone to do this. The scissor jack is designed for wheel changing and nothing else.

Glad to see you got is done, now imagine doing for a living, he he

[stevenm]

yeah, i should know better - had a car fall off a scissor jack before - never moved so fast in my life!

the garage was full of junk (read : car parts!) and had no room to get the trolley jack under.