Here's what may have occurred and the recommended steps to take:
Over-torquing the original lug nuts on your vehicle can cause damage to the threads in the spindle. When lug nuts are over-tightened, they can exert excessive force on the spindle, potentially stretching or deforming the threads. This can compromise the integrity of the lug nut/spindle connection and make it difficult or unsafe to properly secure the wheel.
Additionally, using lugs that are too short for your vehicle can exacerbate this issue. Shorter lug nuts may not have sufficient engagement with the spindle, further increasing the risk of the lug nuts coming loose or stripping the threads.
Before attempting to rethread or replace the damaged spindle, you should thoroughly inspect the spindle and lug nut holes for any visible damage.
Check for the following:
1. Elongated or stretched threads: Look for signs of stretched or deformed threads in the spindle holes where the lug nuts are inserted.
2. Stripped threads: Examine the spindle threads for any signs of stripping or breakage.
3. Cracks or deformations: Inspect the spindle for any visible cracks or deformations around the lug nut holes.
If you find significant damage to the spindle, it may be necessary to replace it rather than attempting to rethread.
For less severe damage, re-threading the spindle holes may be a viable option:
1. Determine the thread size: Verify the correct thread size and pitch of the lug nuts used for your vehicle.
2. Use a thread tap: Obtain the appropriate thread tap that corresponds to the lug nut thread size.
3. Start tapping: Carefully insert the thread tap into one of the damaged lug nut holes and turn it clockwise by hand to begin cutting new threads.
4. Continue tapping: Gradually apply more pressure and continue tapping until the thread tap has reached the desired depth.
5. Repeat for other holes: Repeat the process for each of the damaged lug nut holes.
Once you have successfully re-threaded the spindle, you can install new lug nuts of the correct length.
Make sure to tighten the lug nuts properly, using a torque wrench, to the recommended torque specifications for your vehicle.
If you are unsure about your ability to safely and effectively rethread the spindle, or if the damage appears to be severe, it's best to consult a professional mechanic or take your vehicle to a reputable auto repair shop for assistance.
