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While I was in doing my opti replacement (which didn't turn out to be the problem, actually) I went ahead and did the vent mod. I haven't hooked the vacuum hoses up top yet, but they're there for when my back stops hurting to plug in.
My question is - now that I've done the vent mod, can I wash the engine? I sealed up my opti pretty good - I put clear silicone around the electrical connection and around the entire cap. Is it still not "OK" to wash it, or get it wet?