Fifteen to twenty years ago when I was an outside salesman for a private label auto parts company, I sold "Blackjack" plugs by the gross.
One selling point was they're better on a steel belted tire because they seal the hole from the outside also and prevent water from getting to the steel belts, causing rust.
I've plugged dozens upon dozens of tires over the years, and the only time I've had a problem was when the hole in the tire was too big for the plug. If the plug fits tight, no problem. On yours, the plug is doing what it's supposed to, so I'd leave it alone. And I'm sure there are those who disagree.
I gotta tell this. When I had that job selling parts, the company president had a Ford conversion van he drove while setting up new business. He carried an awl, and a pack of plugs and plug tools with him, and if he wanted to demonstrate how simple it was to plug a tire, he'd poke a hole in a tire on his van and stick a plug in it. One day, he blew a tire for real, and the tire buster who broke it down freaked out because the tire already had a dozen plugs in it.
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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