Repair
On the vehicles in question, both flanged connections of parts of the exhaust system and sliding ones with a clamp are used. Before dismantling such fasteners, always pre-lubricate them with a penetrating liquid and wait a sufficient time. The nuts should always be loosened with little force, especially on the intake manifold. In the event of a stud failure, the entire manifold assembly will have to be replaced. If it is not possible to disassemble the knot, then it is recommended to saw it off or cut it off with an autogenous. It should be borne in mind that when dismantling the exhaust pipes, in which the sections are pulled together by ladders, the ladders usually break off.