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front subframe striped chassis nut inside apron

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Old Nov 8, 2021 | 11:38 PM
  #1  
stevos555's Avatar
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Default front subframe striped chassis nut inside apron

What's the best solution for a stripped nut attaching the NA front subframe by the LCA rear position. I could not get torque on the bolt to go beyond 35 Ft/lbs. Is the helicoil or timesert doable in this location ? Is drilling and tapping to next size up (m12) better. Need to see the body shop manual how to access this nut if welding a new one is the only option. The rest of the bolts on the chassis seem to hold torque. Need some advice on best path to repair. Thanks much
Old Nov 9, 2021 | 09:41 AM
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I ended up using a heilcoil, was able to reach factory torque values no problem. YMMV.

I feel like you may run out of metal drilling up to the next size.
Old Nov 9, 2021 | 08:23 PM
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I absolutely hate helicoils. Probably not enough meat for a timesert.

I've had good luck drilling and tapping m10 threads to 7/16 when there isn't enough material to go to M12.
Old Nov 10, 2021 | 10:39 AM
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I had one body shop cut up the NA body,
There seems to be enough meat in this nut to either do helicoil, timesert or tap to larger size.

The timesert needs to be specific height to lock in, the helicoil is less sensitive to length and can be tried first perhaps before tapping to larger size.
Attached Thumbnails front subframe striped chassis nut inside apron-photo640.jpg  

Last edited by stevos555; Nov 10, 2021 at 03:57 PM.
Old Nov 12, 2021 | 12:41 PM
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Can you put a small hole in the floor above it and just get a socket on it?

As in, replace the nut with a non stripped one.

Last edited by x_25; Nov 12, 2021 at 12:52 PM.
Old Nov 12, 2021 | 09:42 PM
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It's not in the area of the tub. It's front apron passed firewall.
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