Piston Slap: A Fusion of Moonroof Drainage Problems? (Part II)

(photo courtesy: OP)

Matt writes:

Hi Sajeev,

I’ve got a follow up question to this one. The leak is still happening. It seemed to have stopped over the winter because of the snow and cold. The snow wasn’t melting enough to cause water to come into the car but we’ve been getting heavy rain lately and the leak seems to be back.

I noticed a couple days ago that the sunroof is rusted out on the inside of the rubber seal that runs around the moon roof itself. I’ve attached some pictures of it. The rust seems to stop, from what I can tell, around the drivers side front corner of the moon roof but along the front and especially the front passenger corner of the moon roof the rust is really bad.

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