- Jul 7, 2014
- Winnipeg MB CA
Guys - '97 Mazda MPV RWD, 335K km racked up here in the moderate rust belt. I'm trying to remove a very stubborn ball joint shaft from the steering knuckle. The cotter pin and castellated nut came off OK. The shaft is tapered and is a friction fit. (Likely a rust fit at this point.) Factory Recommendation: Use the SST (special service tool) to press out the stud. (The Mazda SST is similar to the Harbor Freight one.) I was unable to find one locally, but doubt it would exert enough force anyway. Recommendation from my professional mechanic friend from church: Soak with penetrating oil, and beat on the knuckle proximate to the tapered shaft to deform the metal around the shaft, allowing the penetrating oil to work in. Better yet, shock the metal around the shaft with an air hammer. What I've done so far: Lots of penetrating oil, lots of beating with a heavy hammer (can't get to both sides, so one hammer only), air hammer, pickle fork jammed in and beaten on. No go so far! This is the good (unbroken) side. I had to take the knuckle on the other side into a machine shop. They drilled or pressed it out, not sure. Would love to not have to remove the knuckle on this side. On the one I had out, I had a ball joint press in place, and wailed on it with a hammer without success, before taking it to the machine shop. (Can't get the press in place when the knuckle is still on the vehicle.) Any thoughts? I'm a wit's end. Thanks!