Cracked wastegate on turbo question
 

Hi
Could you take a look at the picture,where the black line is on the wastegate, a crack has appeared!
About the same length as the black line.

What causes this?
Where can it be repaired?
What damage can be done if left?

Cheers

Dannytwo

http://i7.photobucket.com/albums/y279/dannytwo/aps1.jpg

Out of curiosity what turbo is this ? Looks like an APS jobbie if i'm not mistaken?

The crack at the moment is very minor and someone may fix it - (sorry not sure who would/could) maybe someone like turbo technics might. But i must say the turbine housing will be scrap if you can see light through it when removed this will also mean gas leak and turbo will not reach boost required.

It happens due to the turbine housing heating up to extreme temperatures then cooling off to very cold i.e. in winter. IMHO i would replace it with new housing. Although i wouldn't even put that one back in if the crack was near turbine wheel....just not worth it i suppose.

Please do post back contact details of the person who repairs this for you as i would be interested to know what type of work guarantee he/she would offer.

Good Luck (sorry i wasn;t of much help)

Yes it is an APS turbo
Cheers for the info:)

The turbo looks new ?

Turbine housing cracks can not be welded. Due to the heat ransfer and the heat cycles through the housing, the crack would re-appear in a very short time. It will need addressing asap as it will cause boost control issues. If the CHRA (Centre Housing Rotating Assembly) and the compressor housing are ok, you should just be able to buy a new turbine housing, but they are not cheap!

my tdo5 housing was welded up 2 years back around the clamping section ;)

Around the clamping section is a little different, but round the wastegate will never give a reliable repair and i don't know one turbocharger remanufacturer that would guarantee the work, certainly not ours.

cheers Dan :thumb:

The VF39's crack all the time, many get used for many thousands of miles with no problems after the crack appears, and its right on the wastegate seat like that.

Simon

This turbo looks like it has been rebuilt from an old housing, that has been refurbed.

Change the housing and don't bother risking it.

It's either because it's monkey metal or EGT's have been too high.

If the crack goes through the housing, whilst it may operate, you will be losing boost pressure.

How much will it cost roughly for a new housing?

It depends whether you can get a good re-man housing or a new one. Anything from £100 to about £400.

That's what we charged anyway (i used to work for one of the largest turbo suppliers in the country :thumb: ).

Not without boost control issues it wouldn't.

*Bump* I just brought a vf35 with same problem, Just checking there is no way to repair this? before I send it back to the ebayer!

Send it back it's not worth it. Especially with an IHI.