What is the Waste Gate for n simple words?
Are there any pics that show the Waste Gate and the little hose connecting to it? What is that hose for?

 

The wastegate vents excess boost...

 

+1

genik, if you do not know this stuff already them PLEASE take your car to a professional to have any work done.

 

can you please be a bit more explanatory and also are there any pics of the little tube/hose that connects to it?

 

As your rpms rise there is boost being generated by the exhaust being pushed through the turbo. When you let off the gas the RPM's will drop. As they drop the engine does not need the boost any more and it has no where to go. It is then vented by the waste gate.

 

And geink do some more searching both in the NAM archives & Google.
Most of the questions you propose are more general car knowledge and not necessarily MINI platform specific.

- Erik

 

While you guys sort of have the right idea your specifics are a bit off

The most important thing to understand is wastegates DO NOT vent boost. Boost is vented by your bypass valve. This happens when the throttle body close's and the turbo continues to spin. pressure is still generated threw the inertia in the turbo,but starts to back up against the turbo so, a bypass valve allows the excess boost pressure to recirculate around the turbo charger reducing harmful pressure.

The Wastegate has a similiar function but is not related to the "boost pressure" A waste gate is what controls the amount of exhaust gas (or exhaust heat energy) that the turbos turbine (or hot side) has access to. When fully closed all of the exhaust energy is used by the turbo allowing the compressor wheel to make boost pressure. Once the system has reached close it's full boost pressure the wastegate will start open. As the wastegate opens it bleeds off exhaust energy and slows the turbos rate of speed. the more the waste gate opens the less exhaust energy the less boost pressure. So in the end the wastegate has control over the boost in the system, but it is not a vent.

hope this helps

 

http://image.nengun.com/catalogue/or...e_-_gt2835.jpg

the tube you see is what controls the wastegate.

ours work off of a simliar principal but are backwards.

 

two very important questions if this tube is loosened
1. can it cause loss of power over 4000rpm?
2. can it be responsible for the appearance of the check engine icon?

 

1 Yes
2 Yes

Go get it looked at.

 

But it was checked by the dealer and he said that it was the cause of 1 and 2, so i was just checking. Problem is that these issues *** not working, and power loss over 4000 are issues that come and go. Now its the 3rd day that all work well.

Do we have a picture of that WasteGate tube as it is in the engine so i can locate it to check it every now and then it its tight?

3. can the loosened tube also be responsible for the *** not to work?

 

Not sure about your ***, but if its disconnected you will get this:


And this:

 

Regarding the *** issue, i don't get such a notification, when the issue first started i got a few times the check engine icon but not on the rpm gauge like yours, but on the speedo. Then after taking it to the dealer it never appeared again but *** wasnt working, you see... the "not working *** issue", is not a permanent one cause one day its working and the next its not!

 

and also can i see a picture of the waste gate where its located in the R56 engine so i can find it myself?