Is My Turbo Stuffed? Vids N Pics

[sly100]

Howdy

in the past week, when Ive started the car from cold, Ive heard a sort of grinding noise coming from near the turbo, both times Ive lifted the bonnet straight away and listened to where the noise comes from.. so I'm assuming the turbo cos its from that area. The only weird thing I noticed was that it went away by it self one time, and I gave the engine a little rev the second time and it went straight away.. the first time it lasted no longer than 30 seconds.. second time maybe 10 until I revved it

After reading through every thread I can find... Ive gone out and checked the turbo... it has the usual shaft play side to side.. but it has an alarming amount of shaft play back and forth into the turbo... I can spin the comp wheel and it doesn't seem to be scraping anywhere when I turn it.. however there are a few slight score marks visible on the inlet.

I have taken video of the shaft play.. the louder noises are back and forth.. sorry about the bloke mowing the lawn in the video

have also got video of the turbo winding down.. I was assuming this was normal, but I thought id post it anyway to make sure

there is also oil all over the comp wheel from what I can see from the inlet, im guessing this is just blow by though

I cleaned the inlet with a rag+ carby cleaner and did the boost solenoid maintainence... and took it for a spin... makes boost easily happily spins to 4.5psi every time and chirps the tyres.. does not feel down on power in any way

scratch marks in this pic

also in this picture theres alot of oily buildup on the outlet of the turbo comp housing? is that just blowby too? or a leak from the oil feed?

if the noise is just my bearings caused by a bit of oil starvation.. can I remove/ install a better turbo feed oil line and itll be ok? or is the turbo pretty much buggered?

I will be taking it to a turbo shop on tuesday (public holiday monday) but some advice now would be awesome

Cheers!

Ken

Edited 12/06/10 08:25 AM by sly100

[RHR]

Sounds normal. They can be a little noisy when cold. To rule it out take the car for a run. Pull the intake off the turbo then switch the car off. There should be bugger all sound from the turbo. From the pics it does not appear to be rubbing on the housing

The oily residue is also normal

[orangeute338]

if theres play back and forward then it needs new thrust washer, if theres not much up and down then you wont be able to see much rubbing because its not rubbing up and down but it will be rubbing on the inside of the compressor housing, if you pull the housing off you will see it....the oil on the inlet is just from the breather, if the oil is after the compressor then the seals are shot too....I had oil pissing out of both sides of the cartridge on my bike(dump pipe and boost piping)

you might get away with pulling it apart and putting in a new thrust washer, im not sure about the inside workings of bb turbo though I have only pulled bush ones apart and changed bushes

p.s. that's intake side of the compressor not the outlet as you called it.....

[sly100]

ah ok that sounds like it might not be as bad as I thought.. oh and the oily residue is visible in one of the pictures on the compressor outlet where it hooks onto the hot side piping... I didnt know if it had dripped from the turbo, or come back through the piping..

[orangeute338]

ya dreaming dude theres no pic of the turbo outlet, all I see is 4 pics of the inlet with the comp wheel there.....if theres only a bit of oil its probably just the same oil that's on the front side from the breather, a bit I mean like few drops worth, mine has the same thing...if its more like a teaspoon then you might want to check the seals...my bike had like 10-20ml of oil in the piping....lol and it looked like a 2 stroke out the exhaust....best thing to do is just pull the turbo off and get it checked out by a shop, be prepared to pay heaps though....a rebuild on a t02(et pulsar turbo) bushs and seals is $800

[sly100]

hahahah my bad forgot to add the picture to the page...

the black area around the compressor outlet that's a decent amount of oil mixed with dusty crap.. its either come back through the hotside piping or dripped from the power steering

ive taken it to the turbo shop now anyway... apparently the end float and shaft play is within specs (it moves in and out 3mm) turbo does not seem to be hitting on the housing and not damaged yet however the bearings are worn from oil starvation stupid turbo feed filter... going to get the turbo rebuilt with new bearings for $800 and checked for any cracks on the exhaust housing

cheers for the help

[orangeute338]

wow 3 mm is within spec? I dont know about that, but they are the experts so I guess..none of my turbos have eva had that much end float..so was the filter all clogged up? exhaust housing cracks are overratted dont worry about that if they try talkin ya into a new housing....$800 is pretty standard I think...

[GOLDIE]

The pic that shows you looking straight in the intake shows your problem.

Have a good look the impellar is off centre due to bearing wear in the shaft it should be dead centre.

should have only a little movement up and down and backwards and forward.

Ian

[sly100]

wow 3 mm is within spec? I dont know about that, but they are the experts so I guess..none of my turbos have eva had that much end float..so was the filter all clogged up? exhaust housing cracks are overratted dont worry about that if they try talkin ya into a new housing....$800 is pretty standard I think...

havent checked the filter yet, getting a replacement oil feed kit... his exact words were 'yep that's all normal, ball bearing turbos have a bit more end float than bush turbos, and there appears to be no damage to the housings so its just the bearings'

yeah he was talkin about the housing but mostly because he was recommending doing the bigger wastegate port or something while the turbo is off..

The pic that shows you looking straight in the intake shows your problem.

Have a good look the impellar is off centre due to bearing wear in the shaft it should be dead centre.

should have only a little movement up and down and backwards and forward.

Ian

jeez you must have bloody good eyes hahah I didnt even pick that up..

if theres bearing wear in the shaft is just new bearings gonna fix that? ive heard that you cant just whip new bearings in and the turbo all be fine. once the shaft is damaged its damaged... is that the case?

I just dont wanna spend money on this turbo if its gonna end up being a dud when I can just get a hold of a new one..

cheers

[GOLDIE]

to do it right if the shaft is ok new bearings new impelalar and it nust be balanced.

This is what I had done when mine went.

If the shaft is damaged you can get a new assy for it.

Ian