Before I assume something hidden I’d just assume rust and perhaps some kind of thread locker. This might just be the kind of thing you’d rather leave to a shop. Or at the very least get your hands on good compressor and impact wrench.
Before I assume something hidden I’d just assume rust and perhaps some kind of thread locker. This might just be the kind of thing you’d rather leave to a shop. Or at the very least get your hands on good compressor and impact wrench.