Just had a customer emergency. Guy calls up on a trip down in Baja Mexico. Steering started getting squirley so he pulled over. Two studs and hardware are completely missing from his right knuckle and the other two are loose.
Of course he has no spares but there is a small hardware store not terribly far from him. A quick measure with the studs I have here in stock and the knuckle-side of the stud is M12 x 1.5
The emergency solution is to get a set of 40mm long bolts to replace the two missing studs and tighten the two that are still on and use the new bolts in place of the studs.
The thing I made sure to keep in his mind is that Toyota does not spec a torque for the stud into the knuckle itself. It's just...tight. The clamping force and torque is on the nut and cone washer. The bolt could be threading into the knuckle which is why Toyota uses a slightly thicker shoulder to prevent that.
It's a good emergency solution if you have the correct bolt but definitely needs to be replaced when back at home. In fact all of the knuckle hardware needs to be replaced because it's been compromised.
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