MCX 270 waste gate push rod bent...

[Nytro270]

The push rod on my waste gate is bent, I'm guessing that it shouldn't be bent and that this is probably contributing to my low boost numbers.. is that correct???

 

[RED]

I kinda doubt that's your problem. Most likely you have an exhaust leak, or a boost leak. But first you need to check out the operation of the wastegate. To see what pressure its opening at, & to see if will hold a vacuum to make the diaphragm is not leaking. Here is picture of the nytro mcx, rod looks pretty much like yours. Last time I rode the sled, I was making 17lbs in Revelstoke.

 

[RED]

This what my vacuum/pressure pump looks like. Can get it @ any local napa dealer for around $100cdn. Very handy tool for turbocharged sleds, hard to do any testing without one.

 

[Nytro270]

Thanks for the reply and the pictures, good to know the rod is fine. I got thinking about and exhaust leak so I pulled to tank to have a look at the headers and all three flanges were burnt up so I would have been losing exhaust pressure like mad.. I have a vacuum pump simular to yoursee and will try to pressure test everything tomorrow. .

 

[RED]

Should replace the exhaust donuts with the copper style. When I checked the wastegate out, once I got to 15lbs on the gauge. The rod just starting moving out the pot. The mcx tcv has been replaced with a manual booster controller on this sled. Not sure if yours still has that.

 

[Nytro270]

What's the tcv? Sorry I'm quite new to these things.

 

[RED]

Its in your first picture, Follow small vacuum lines from the turbo the little black plastic box with 3 nipples on it. There will be also blue/brown wires going to it. The mcx ecm(under the hood somewhere) tries to keep boost level the same. Sometimes they don't work so well. Hence, a manual boost controller gets installed. I can post what manual boost controller looks like tomorrow if your not sure.

 

[Nytro270]

Ahhh that little thing. Yeah if you could post a picture of the manual controller tomorrow that would be great!

 

[RED]

Here is couple pics of manual booster controller that Turbosmart makes. There is lots of different ones out there, a search online will find lots. But you have to know what your doing with it. Cant just set to 17lbs & all will be good. It depends on a lot things, octane rating, if your riding in the mtns, etc. There is more info about fuel requirements/boost levels, you will need to research that.

 

[Nytro270]

So I pulled the lines and pressure tested the pot for the wastegate, no vacuum and no biuld up for pressure. (tried both just to be sure) So my question is can i just get a universal wastegate actuator or does it have to be an mcx part?

 

[RED]

Best advice I can give you on that, call Brad @ PG motorsports in Prince George BC. He is the MCX guy. Unless you can find a local Yamaha dealer that has one in stock.