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| Jun oil pump gears showing a slight ovalness to them |
This is something that we noticed fairly recently with the oil pump gears on the RB26. The inner gear on the oil pump has two flats that are driven on the crank. We noticed that we had some oil pumps that were binding. Measuring at the flats and the opposite side to the flats, the gears appear to be going oval. We have seen it in a JUN oil pump, and a Tomei oil pump. Both pumps, when the gears were replaced with Spline drive gears, no longer showed signs of binding in the housings.
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| Tomei oil pump gears showing a slight ovalness |
Oil Change and Filter
Spline Drive Gears
RB26 Oiling : Oil Pumps : Oil Restrictors : Oil Pan modifications
Tomei vs Jun Oil Pump
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