The question has only one of two possibilities: 1. you knocked a wire loose somewhere or moved one to a point where it has melted and shorted out. 2. it's just a coincidence and has nothing to do with your repairs.
It is not possible to mend a crack in class. Once the molecular bond is broken, there is no way to restore it. Most windshield replacement services will come out and replace the windshield on-site.
It is possible, but the torque converter, computers are different.It is possible, but the torque converter, computers are different.
Yes it is possible.
No adjustment is possible.
Not likely but possible.
Yes. If you have a blown head gasket and the coolant is entering the combustion chamber then it is also entering the converter.
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There's no possible way to pass inspection with a bad catalytic converter, if if you find out you have a bad catalytic converter during your inspection you have a chance after you after you have replaced the catalytic converter and the inspection no no charge/free!!
Normally the heat shield on top of the converter is the source of the rattle. It is possible the the converter medium itself has broken into pieces resulting in a rattle that sounds as if there are rocks in the converter. If the heat shield and the rest of your exhaust seems secure, it is likely the converter needs to be replaced.
It is possible to fix a cracked windshield, depending on the size and depth of the crack. If it is relatively small and shallow, you can use any number of sealers offered at most auto parts store. If the crack is very deep, however, you may just want to replace the windshield, as sometimes crack repairs can fail, causing your windshield to crack even worse.
possible leak in heater core.