Spraying penetrate on body mount bolts

[1983calais]

I’m wanting to do this to my Monte Carlo and I am afraid they are going to break off. I was planning on spraying penetrating on them. Maybe I will put it on the lift and spray every day for a week and see what happens. I hope I don’t get in the same boat 565 was in with his regal. I feel for you man!

 

[565bbchevy]

I hope I don’t get in the same boat 565 was in with his regal. I feel for you man!

I was fully prepared for what might have to be done and my plasma cutter comes in real handy for this stuff, when to comes to body mounts plan for the worse and hope for the best.

 

[timo22]

On my Bonneville, I drilled a small hole in my trunk where my four rear mounts were. Was able to squirt PB with the straw, directly on the cage nut and bolt. I was able to get 3 out of the four out without breaking them. Just like stated above, the bolts rust in the middle where the rubber is. But if you can get something on the bolt and cage nut, it will increase your odds of getting the bolt out in one piece.

 

[CDUNIGAN1981]

On my Bonneville, I drilled a small hole in my trunk where my four rear mounts were. Was able to squirt PB with the straw, directly on the cage nut and bolt. I was able to get 3 out of the four out without breaking them. Just like stated above, the bolts rust in the middle where the rubber is. But if you can get something on the bolt and cage nut, it will increase your odds of getting the bolt out in one piece.

Oh, okay. I get what he tried to explain above. Its not about friction in the middle of the bolt, it's about the bolt rusting itself in half bc the rubber mount is so bad moisture had its way.

I guess I'm still confused about how the penetrate can prevent a mishap or make the removal of the bolt easier if the penetrates target is not the caged nut or bolt thread.

 

[565bbchevy]

 

[DJHull]

Definitely not, my Monte I did 20 years ago and didn't have any issues but my Regal beside having to rebuild the mounts under the rear seats I also had to cut out all of the trunk ones and 2 others.

I had to do the do thing.

 

[timo22]

I guess I didn’t explain that very well. The reason the bolt breaks is because the bolt threads are rusted to the cage nut. If you can get PB directly on this area, it will free the bolt from the nut. Obviously , since most bolts look in similar condition as the pic, it is possible to back a rusty bolt out. And when I did mine, I drilled an 1/8” hole over each mount pad in my trunk. I was able to soak it for a couple days. Even a couple of bolts looked similar to the pic, I got them out.

 

[1983calais]

I think I may try the timo trick. Break the drill out. I haven’t looked at the mounts yet but I’m assuming you can’t get to the threads any other way?

 

[joesregalproject]

All 4 of my trunk bolts had broken cage nuts and I snapped one of the ones in the middle under the driver's door. The rest came out okay. My car has been in Pittsburgh its whole life as far as I know.

 

[RabbitHoleSS]

This was my biggest issue too. I lubed tgem for a solid month before i tried loosening them.Either the bracket that stops the cage nut snapped or the whole bottom of the body mount came off. My car has lived its life in the north though. I will say I only snapped 1 bolt. Pass #6 so if you lube it good and the body mount itself isnt rusted you should be good.