Found my left outer cv boot had about a 1" tear along the outer edge of a rib over the weekend. Telltale signs of spewed grease were all around my wheel well.
Sooo, after checking it out and realizing it must've just happened and my boot wasn't completely torn all the way around, I thought I'd take a stab at pumping the boot back full of grease and sealing up the rip.
My only intention here was to see if I can get more life out of the axle before I eventually replace the entire assembly (when I have the coin). I'm not screwing around with rebooting it.
needle fitting for grease gun (any auto parts store has it)
Read a thread on some other forum about using Shoe Goo or GOOP for this temp repair. I had an old tube of shoegoo, but wasn't confident that it had maintained its original binding strength, so picked up the Marine GOOP sealant. Similar stuff, possibly less flexible than shoegoo but UV resistant.
The needle fitting is key: I was able to pump the boot full of grease without ripping the boot any wider than the original 1-inch rip. Took a long time, natch. This thing almost looks like the air pump fitting you'd use to pump up a basketball or football. Sharp end, though, like a hypodermic needle and it's got a zerk end to fit to the grease gun.
Spent time cleaning the boot really well after it was refilled with grease. Used shop towels to get off the majority of the original grease that had shot all over the boot, then used rubbing alcohol to clean the rubber for the sealant.
Put a nice thick layer over my rip, with ample overlap, let it cure 12 hours and I'll be damned if it didn't hold! Just did my dd commute today, only 20 miles round trip, but was pleased to see the goop had adhered really well to the CV boot but has a rubbery texture, isn't hard or rigid like dried glue. Added another application tonight for good measure.
Again, this is certainly not meant as a final fix. But as it's worked well enough to get some extra miles out of my torn boot, might be worth a try if any of ya'll find yourself needed a temp fix for a torn boot and have the hours to let the stuff cure.
Sorry, no photos.