I'm getting ready to repack my front wheel bearings.

I was wondering if you could use one of those bearing buddies or "Red-eye" wheel bearing caps that are available for boat trailers?

I think all greasable wheel bearings are basically the same design. An inner & outer bearing, inner seal and outer dust cap.

With boat trailers you back into the water while the bearings are still hot and the sudden cooling can cause water to get sucked in past the seals. The special grease caps have a grease fitting so you can grease the bearings after you pull your boat out of the water at the end of the day. This pushes the old grease out the inner seal and any water out with it and replaces it with fresh grease without having to take the hub apart everytime.

Why can't this be done with wheel bearings on a car? If the special bearing caps don't fit why can't you drill and fit a zerk fitting onto a Mercedes bearing cap and squirt away with the old grease gun?

This would save a couple of hours labor and you could regrease anytime you wanted.

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5