Both the RMS and IMS seals need to be replaced, use the factory PTFE RMS seal and set it at the correct installed depth. To do the IMS, you literally need to put the engine in the condition to replace the IMS bearing (crank locked at TDC, cams locked, tensioners removed, etc.), and you would need to remove the IMS cover, so you might as well do the bearing while you are at it.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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