when I was changing my SC coupler the turbine assembly came out a little also so I thought no problem. I slid it back in but before I did a put a small amount of gasket maker on the turbine side making sure not to get any on the area the turbine rotates on. I put the coupler on and used the gasket maker to seal all things back up. when I tightend a few bolts I notices the pulley will not turn anymore. when I slacken the bolts the pulley turns. I took the snout off and I noticed a small amount of opening between the sc housing and the plate the turbines sit on. when i press the plate in by hand the turbines freeze up but when I let off pressure they turn. What did I do wrong here?

When you changed the */C coupler,did you also change the needle bearing as recomended?

If you slid the rotor plate and rotors out by mistake, it is likely that you messed the needle bearings up, and they are binding. Please pull the rotors out completely to prevent further damage to the ends that go into the needle bearings.

It'* not needed nor recommended when performing a simple coupler change. Changing the bearings themselves would make the process much more evolved and require a press among other tools.

Removing or reinstalling the rotor plate will cause no damage to the needle bearings & I don't think the bearings are the cause of this problem.

I would try to apply gasket maker to the rotor plate and install that into the housing. Then apply gasket maker to the snout and install that along with the coupler.

Ed

I see no possible damage to the needle bearings either. Seal both sides, and put it back together. Turn the charger by hand with the pulley afterwards to make sure it spins freely.

I've never seen any damage to needle bearings caused by anything other than high mileage or age.

Im such a dope.. you have to torque down all the bolts because I guess the tolerences are so tight. when I tried the first time I only had two bolts on each side snugged down. sorry for the goof up.

No need to apologize, live and learn as the saying goes.


Ed

SOB!!! When I was trying to see what was wrong with the turbines I cleaned off all the gasket maker off the turbine side thinking I got some in the path of the turbines. I got everything back together with no gasket maker on the turbine side. Do I have to go back in to re-do everthing?

That would be best. You're going to have a boost leak if you don't. Not just that, but when you're not under boost, it'll suck in unmetered air (not going past the MAF) and cause you to run lean.

isnt it not good to keep pulling the rotors out of the needle bearings, as it takes a little bit of grease out everytime?