turbo rattle

[dubsweeper]

at the moment im getting the a4 b5 qt serviced , also the turbo needs attention as well it has started to make tinny noise when deselerating ! , the turbo has been taken to turbo tech ,
Has anyone had this problem before ? if i need to replace it what is a good turbo to fit for a replacment , shane

[PeDiES]

the wastegate begins to rattle on k03's as they get older, depending on what you want to spend a k04 can be a nice upgrade but no gain in power will be seen without maf, injectors & software

http://www.eurospeed.net.au/index.php?main_page=product_info&cPath=1_43&products_id=185

[random101]

might be time for a new turbo

[dubsweeper]

want to sell the audi so yes will be replacing the turbo for a genuine one , if it can be found locally ?

[Pete@ECSTuning]

New/used Ko3's are not costly. If you are planning on selling the car I would just go with a stock turbo, no need for a ko4.

I know we aren't local, but for pricing ideas - this is what you are looking for (http://www.ecstuning.com/Audi-B5_A4-Quattro-1.8T/Engine/Turbo/Assembly/?salesrep=CArmbruster&utm_source=vwwatercooled&utm_medium=forum&utm_content=CArmbruster&utm_campaign=postreply).

[dubsweeper]

got a new turbo fitted , stock ko3 , well its made a huge difference too , i can actually here it working , the old one was stuffed it had cracks in the housing .

[noone]

What sort of Kms? Was the car modified?

[dubsweeper]

its done 181000klm just got a reciete for the work done from golfwagen , over a thousand dollers spent, the audi hasnt been modified

[Jmac]

Got pics of the turb mate????? Seen a couple cracked, and at the same time found the oil pipe sludged to the max, obviously overheating and not lubricating properly. Did you clean out your oil pipes???? common thing on the 20VT. Lots of heat from the Turbo and manifold baking the sludge and carbon in the pipes.
Cheers
Jmac

[dubsweeper]

yeah got some pics i just took !will post them up shortly

[dubsweeper]

http://www.vwwatercooled.com.au/forums/images/imported/2010/01/aaturbo-2.jpg

http://www.vwwatercooled.com.au/forums/images/imported/2010/01/aturbo-2.jpg

[dubsweeper]

http://www.vwwatercooled.com.au/forums/images/imported/2010/01/aparts-2.jpg

[Jmac]

Have to say there will be a lot of turbos out there with wastegate cracks and housing cracks, not really that uncommon and they go un noticed pretty much, only when it shows up when boosting then the issue starts and in your case it was probably more of a rasp than a rattle??? seen lots of cracked turbos that produce perfect boost, it gets pretty hot in there. Wastegate seats crack often but seal ok when the gate is closed. Others crack bad if the EGTs are through the roof and like i mentioned earlier check the oil pipes
Cheers
Jmac

[dubsweeper]

it was arattle , i dont think it was even spinning !
with the new one i can here it all the time when around 2000rpm , do they need to be run in ?

[Jmac]

Again lack of lube, rattle would have been the shaft and bearing, crap boost at the same time, the exhaust cracks would have been there prior i think.
Run in, well a tomato sauce bottle used as a squirter i use and i prime the turbo before start up and let it idle for a fair bit, then its game on mate pretty much
Jmac

[dubsweeper]

had the turbo for three days f### !

what happen i was driving down the back street and it seened to wind off the turbo making a winding noise ? , i got back home around the corner and come to an idle and it was rough idling ?

turne the car off then started a bit later 20 min , and there was a tappet noise as well ?

it went away but know power now , hmmm this cost me $$

[Jmac]

Hmm you would have had a few pipes off doing the turb. Check that there is no pressure hose off or intercooler pipe off, this would drop your power and car would run crap, the tappet noise i think is something else. Could be a few things that. Ok how does it idle now?????? to check the turbo boost control a quick check is pull off the actuator line and try the car for a very short spell, i say this as it will keep the wastegate shut and overboost. This way you would know the turbo is ok at least, then work back from there, also give it a scan, broken wire at N75 is VERY common and can go un noticed, no boost again. So yeah work Turbo back mate. If its still crap with the actuator line off then you dont have to waste any time checking control.
Cheers
Jmac