I own a 1992 jeep Cherokee Laredo and have attempted to replace the exhaust as it was rusted out and falling off the car. Unfortunately I had to remove the exhaust pipe from the exhaust manifold and in the process I snapped the lower bolt on the exhaust manifold. Luckily I was able to remove the nut on the upper bolt without a problem. My question is what I should do with the lower bolt. I tried to tap it out with a hammer but it is attached to the exhaust manifold rather solidly. Do you know if the bolt is pressed into place on the stock manifold, or in my case is it probably just rusted in rather firmly. I have been using PB Blaster very liberally but it has not helped (except when I removed the nut from the upper bolt). Should I try to hammer it out or do I risk damaging the rest of the manifold? Should I try to cut the bolt off flush with the manifold and then tap out the rest of the bolt with a punch? Do you think this is possible to do working on it from under the car. I have attached some pictures of the exhaust manifold Any suggestions would be appreciated.