Compressor wheel rubs inside of housing
#1
Compressor wheel rubs inside of housing
I bought a used MP70 from a member on here and he claimed it has low mileage but it was pretty dirty and the compressor blades were slightly chipped like it was run without a filter. It showed up with the compressor housing bolts snugged but not tight. One of the three brackets was bent.
Anyways, I took it apart, coated the turbine housing, and painted the compressor housing. While it was apart all I did was put some oil down the oil feed hole to keep it lubed. It sat on a shelf for a couple weeks till today when I put it together. With the compressor housing bolts snug, it rotates fine. Then when I tighten them to no more than about ~8 ft-lbs, the compressor blades rub in the inside of the housing. Turbine is fine. The shaft has 0.01" radial play measured with a dial indicator.
Did I buy a crap turbo or am I somehow assembling this thing incorrectly? Thanks!
I marked the blades with black sharpie to see where they were rubbing. You can see they are rubbing on the very corners. 10 of the 12 blades show rubbing.
Anyways, I took it apart, coated the turbine housing, and painted the compressor housing. While it was apart all I did was put some oil down the oil feed hole to keep it lubed. It sat on a shelf for a couple weeks till today when I put it together. With the compressor housing bolts snug, it rotates fine. Then when I tighten them to no more than about ~8 ft-lbs, the compressor blades rub in the inside of the housing. Turbine is fine. The shaft has 0.01" radial play measured with a dial indicator.
Did I buy a crap turbo or am I somehow assembling this thing incorrectly? Thanks!
I marked the blades with black sharpie to see where they were rubbing. You can see they are rubbing on the very corners. 10 of the 12 blades show rubbing.
#4
No matter how I clock it it rubs in the same spot. Even trying to force the housing to one side while tightening won't do anything. The o-ring is in there. Last resort would be to file down the compressor wheel at the corners slightly.