Stock Turbo on MS6

USAFVMI08

Member
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2006 Mazdaspeed6
So I've done a search here and on google but I can't, for the life of me, figure out what kind of turbo the car has. For some reason K04 is ringing a bell but I don't know and I'm probably wrong. Any help with that?

Thanks! :)
 
There are two specs, one for EU countries and one for Japan and USA

K0422-882 was rated at 260hp for EU
K0422-881 was rated at 270hp for Japan and USA

This turbo was manufactured by BorgWarner Turbo Systems but it is a hybrid from three separate BW divisions. The CHRA (core assembly) was made in Germany (part number 5304 710 9901) the end housings by Turbo Energy which is a BW joint venture in India and the acutator / wastegate assembly came from Hitachi Warner Turbo Systems. The latter was a former JV but now discontinued.

If you need any other information, please let me know
 
bump

Isn't this turbo a single scroll just like the MS3's? I know the 2008+ Cobalt SS is supposed to have a twin scroll k04....
 
Will pull a drawing when i'm back in the office to confirm if this is a twin or single scroll
 
I am in contact with a tech person at BW Germany (where the CHRA is produced) and we are trying to get the specific boost eff. map for this turbo. The problem is that it depends on the housing as well and since this is build in India the map is not directly available to him. I have forwarded him all info that is on the housing and he is trying to obtain the information for us.
 
Hi Silo,

If my colleague in Germany cannot get you the information you are looking for please let me know. I have my own contacts at our joint venture company in India who might be able to help.

Which ever BW division did the testing is the one which will have the necessary maps and I'm not 100% sure where we homologated this engine series.
 
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Interesting, lots of info here. Can you elaborate possibly on why the turbo seals are prone to failure on the K04s for the DISI motor?
 
Both ball bearing and floating bush bearing systems still have to retain oil within the CHRA (negligible amounts can seep) but there are a lot of reasons why oil can leak from the bearing housing into the end housings, none of which are manufacturing related......unless of course we "forgot" to put the piston rings / seal plates into the CHRA on the assembly line.

Some applications are prone to problems due to the installation conditions or because of the other engine parts which surround the turbo. For example, if the crank pressure gets too high you get oil leaks. If you block or restrict air through the air filter you get an oil leak, if your oil pump is pushing too much pressure....guess what happens?

Turbos leak oil or fail for a reason, if you don't investigate the reason then repairing / replacing a turbo would be pointless as you are highly likely to see the same problem happen again in a relatively short time.
 
+1 on that. its likely the seals aren't failing but they are just leaking. i mean i guess you could say that is failing but i wouldn't say that is so. its just the way the turbo is designed. i use 5w40 oil to prevent the oil from leaking since its a bit heavier. has done the trick so far.
 
You may want to up that back to 10w/40 during winter months otherwise your oil pump will be pushing molasses through your engine haha

What you don't want to see is to have blue smoke pouring from the exhaust while the engine is under load.....the EPA would not approve. If you can see smoke in the rear view mirror then the seals are going to need replacing.

When the car is idling at low speed for long periods of time there may be a very small build up of oil at the compressor end which is due to a slight vacuum effect which occurs behind the compressor wheel but as soon as you step on the gas this would clean up immediately.
 

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