Chrysler Repair: Sebring missing - 1996 (couple), head gasket leak, tensioner pulley

Question
My Sebring recently stalled..totally.  I took it to a repair shop.  First they tried to convince me that it was my timing belt.  Then they told me that my tensioner pulley blew and my idler pulley blew.  They also tried to tell me that they replaced "A" valve.  In reality they did replace the tensioner pulley and the idler pulley.  Now I started to get nervous so I had my car pulled from this shop.  He tried to convince me to just junk my car and get a new one.  I had someone else look at my car.  The water pump was totally seized up which caused the tensioner and idler pulley to blow.  The original mechanic tried to convince me to let him keep the car and work on it..after he put it all back together and out on the lot to work on someone else's car.  At the last minute he told me "the car is smoking, obviously something else is wrong - let me keep it one more day and find out what it is and do right by you."  I knew then I had to get it out of there.   The water pump, tensioner pulley, and idler pulley have been replaced.  The car starts, runs but is missing now.  When the two pulleys were replaced and the original mechanic ran my car is when the smoking occured. With the water pump seized could this have blow my head gasket and now cause my car to be missing?  Any suggestions if you don't think this is it?

Answer
Hi Sandra,
The exact history of this situation is not totally clear to me. First, which engine is in the car? And when you speak of the tensioner pulley and idler pulley are these associated with the timing belt or with the accessory drive belts?
Assuming that the water pump seized, if the engine overheated in that process it could have warped the head enugh to spring a head gasket leak, or if very severe caused a fracture/crack in the block or head. If the smoke is white (steam-like) from the tail pipe that would corroborte some sort of a coolant leak into a combustion chamber and that would be a head gasket leak as the first most likely. If the smoke is blue it is an oil leak intol the combustion chamber, if it is black that is a sign of poorly combusted fuel. If it is a V-6 engine, then it would be good to pull the wires from the spark plugs, one at a time to find out which cylinder is missing, and thus know which side of the engine the leak is occuring into so only that side's head needs to be pulled.
That is a plausible scenario, but not definitive. Let me know what you learned and what sort of choices you are presented with.
Roland
PS:I know you are occupied with this situation but if you would take a moment to click on the "thank/rate the expert" button below, I would so appraciate a 'yes' where you see the question about a nomination of me to be 'volunteer of the month'. It is a tight race for that homor!