change them!!!! i too had a small leak. then on a trip i stopped to get something and noticed that my tire was really shiny, then i noticed that the side of my car was no longer beige it was black. I had no loss of pressure or anything and infact, it did not leak to much at idle. But at free way speeds it must have been spitting out. i changed my own, wrecks some pants, and a t-shirt but otherwise it went smoothly.
will

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'73 VW camper
'80 300td wagon