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| Then one of the rotor housings is positioned on top of it. |
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| You can see the orientation of the 13B MSP side housings ports vs the 13B REW rotor housing exhaust port. You can see how this adds exhaust side duration. The exhaust port is opened up to further increase duration. You can see how much in this picture. |
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| A little oil is put on the stationary gear to give some start up protection. |
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| The apex seal grooves in the rotor are double checked before assembly to make sure that they seals are free and not pinched. Engines that have been exposed to detonation often have the grooves close up which pinches the seals. |
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| A little oil is placed on the side housing as well. |
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| The rotor is lowered into place. |
