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Hello everyone, I was wondering if anyone knows what this "plug" is on top of the throttle body of a Tundra 06 double cab 4WD? it's been leaking a bit of coolant and I'd like to know if there is an "O" ring in there, the water bypass hose it's connected just to the right of it on the TB's side (out of sight). I cleaned up the coolant build up on top so that I could take a clean picture of it; the hose right above it carries no fluid, as it is the EVAP vent. Thanks in advance.
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