Wierd Ripples in Housings
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Wierd Ripples in Housings
My motor is apart for a rebuild, my mechanic says I may possibly need new housings, because the ones I got have these really really really small horizontal ripples (can not see only feel them). Ive been told by a friend and mechanic as well that their from detonation and completely normal, so should I just get new seals (which I have to get regardless, and let them wear into these tiny tiny ripples? I mean these things are very very slight and small.
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Originally Posted by RotaryResurrection
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#8
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Originally Posted by t-von
Thats what it sounds like to me. Is your OMP not working properly?
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its likely chatter. the housings are junk, its not going to seal very well because the apex seals are going to be bouncing off of the housing surface
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Originally Posted by GoodfellaFD3S
Did you ever over-rev the motor?
#14
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Yes, the idea is that as the rotor rotates, the apex seals move in and out of their slots a little bit. Rev it fast enough, or have seal springs that aren't firm enough, and the apex seal won't keep up with the housing - chatter.
So another possibility is the motor sat for a period of time, and the apex seals took a little set. Probably on the first startup, the apexs chattered a bit but it eventually loosened up.
Dave
So another possibility is the motor sat for a period of time, and the apex seals took a little set. Probably on the first startup, the apexs chattered a bit but it eventually loosened up.
Dave
#15
That's almost certainly chatter. It isn't desireable, but it is fairly common. They are near the exhaust port, right? If the undulations are relatively minor, you can reuse the housings. New housings would be best, of course, but some minor chatter marks doesn't mean the housings are completely trashed.
-Max
-Max
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Update: Well I got them back, and realized that the chatter was not the only reason they were shot. The corner seals ate away a nice chunk of the edge of the housings and the water leak cause a lack of lubrication and scracthed up one of the housings pretty bad, the other one is fairly ok.
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I was just talking to the owner of Pineapple about my rebuild, and he had said that this rippling is the result of a rebuilt engine that had been overheated. I think the deformation exists, and then after the housings are lapped and have more and more heat cycles put in them, the deformations return.
#18
Observation: I think the original post in this thread is about rotor housings, but it sounds like we are drifting toward a discussion about side and intermediate housings.
-Max
-Max
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