Originally Posted by Tundraboarder666

Went to Steve's (FASTL61) house today to install my used lightweight crank pulley from MRZ that I bought off of interviewatruins who's parting out his car. We (Chris, blackbalt06) went to put it on and eventually achieved the goal. I went for a test drive (about 2 miles) and everything felt fine. I could feel it pull a little faster nothing too great though. Then took it back out for the BK lounge (1 mile) and drove back to Steve's house. I went to leave and as we were outside Steve mentioned that it smelled like oil I turned my car on and my lights showed where I was previously parked and a trail of oil throughout his neighborhood. Almost all my oil had come out. Chris and Steve then took the MRZ pulley off and the stock one back on and we noticed something.

Notice the very clear silver ring...

Another view

Now look at the stock one, No Ring indentation at all (I did not take this pic) Stock one is on the left

This is the obvious reason why it was leaking oil everywhere. Has anyone else had this problem? I know I want my money back because this is ridiculous. Any other MRZ pulleys like this one or was I just sold a bad used one? And how was his car not poring out oil if mine was? Im not trying to point fingers at anyone here but seriously WTF mate?
Any help would be greatly appreciated.

Originally Posted by MRZ - RedGTZ

We have corrected the wear issue from the oil seal by putting a steel ring in this area to avoid any wear, steel being a lot more resistant. The new pulley have beeen out for a year now and they are performing amazing with no leak.

We will replace any pulley that have this problem with the new pulley we manufacture. Just email us directly at sales@mrzperformance.com and we will exchange your worn pulley with a new one.

We are the only manufacturer to include the Leak-proof steel ring on the pulley.

We stand behind our products, so if you have any problem or questions please contact us.

Here are the new design, pay attention to the steel ring in the oil seal area: