I'm going to be gutting my cat this weekend, but the bolts on there are like 12 years old. The head immediately stripped, and the threads literally fell off when touched with a screwdriver. I have tried a few penetrants, and am about to just saw the bolts, but I would rather not if possible.

 

You might want to apply a little bit of heat to it. Either run the car for a minute or use a torch to heat everything. This may work, it may not but it's worth a try.

Good Luck!

 

11 years is nothing. I helped a buddy of mine yank the motor from a 140000 mile Chevelle last month-you would not believe how rusted every bolt on that car was. Anyway, you'll definitely need to heat them and use a penetrating oil. What we did was use an oxy-acetelene torch to heat the bolts red hot, then we sprayed Liquid Wrench on the bolts and put the wrenchs to them. It took 2 to 3 cycles of this to break the bolts loose, especially the ones exposed to high heat, like on the exhaust. Hope this helps.

 

You might want to try some stuff Called PB BLASTER I have see(Its the only pen. oil I use) this stuff work magic IT IS THE BEST it is kinda hard to find though (at least around here) and use heat but like I said PB Blaster there is nothing beter


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Ya sure it is just an RS

B4Cyaa

1991 RS B4C
Former Nebraska Highway Patrol Car
305 TPI
WC T-5
Four Wheel Disk Brakes
Only Options
Rear Defrost
Am-Fm Radio
Red-int White-exe
One BA Of A 350 In The Works
Mods
Dynomax Cat Back (to hold me over till I got the $$$ for the Borla)
best 1/4mile Run of 14.92@94.83
with 145,000 on her

https://www.thirdgen.org/rides/index.tgo?action=view&rideid=2201
god speed dale

 

The key to using PB Blaster is to let it soak in for 20-30 minutes. I got mine at local Meijers Superstore.

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86 T/A 5.0 A4 & 2.77 gear
15.62 @ 86 mph
93 Civic 1.6L
13.5 @ 100 mph