CHEV. COBALT /06, 2.2 L. LS, LOSS ENGINE,COOLANT & OIL LUBRICATION SYSTEMS AT NIGHT AT 73 MI/HR, HIT SOMETHING,PASSING TRUCKS IN RIGHT TRACK, ENGINE OVERHEAT EXTREMELY, BEFORE CAN PULL OUT. 1ST.. MECHANIC SHOP, / CAR INSURE, DECIDE ENGINE WAS FIXABLE. 1 WEEK AFTER FIX, AND RUN, ENGINE DAMAGED THE ENGINE HEAD GASKET. 2ND MECHANIC (GENERAL MOTORS SERV. DEPART. ,TOOK OVER THEY CLAIM REPLACE ENGINE HEAD AND GASKET. (INSURE PAID $2,300) FOR REPAIR. WHAT THEY DID ? ENGINE GOT NOISE INTERNALLY & OVERHEAT TO EASE.NO MORE SERV. IF INSURE DON'T PAY EXTRA. & COMPLAIN NO GOOD.... 3ER MECHANIC. (MY SELF IN HOUSE GARAGE) REBUILD THE ENGINE TO THE PISTONS RINGS, CRANKSHAFT BEARINGS,NEW EXHAUST CAMSHAFT,LIFTER(DAMAGED PREVIOUSLY,ALSO ROLLER ,ALL NEWS, THIS DAMAGES WERE VIEW BY THE LAST MECHANIC(THE DEALER GM.)& ALSO IT WAS NEVER A NEW ENGINE HEAD INSTALLED. AFTER THIS AN ELECTRIC STORM, THE ALTERNATOR HAS DAMAGED THEVOLTAGE REGULATOR ECM(ELECTRONIC MODULE ENGINE CONTROL),THROTTLE BODY , ++++ NO HAVE A IDLE BUT ENGINE HUNTING ALARM MALFUNCTIONING, POWER DOOR LOCK, AUTOMATIC TRANSMISSION INTERLOCK DON'T CARE IF @ 70 MI/HR SELECT TO REV. OR PARK.....WHAT WILL HAPPENED !!!??? *TR