First, make sure the oil in the engine is full and clean and doesn't have coolant mixing with it. Second, make sure the belt hasn't begun to rip causing a part of it to slap other parts.
As far as the exhaust, it won't cause a putting; that comes from the engine. Is it missing? When was the last tune up? Does it only happen at night? Finally, when it is hot, look under the car at the catalytic converter to see if it is red hot.
Let me know what you find.
Thursday, September 23rd, 2010 AT 8:58 PM