1999 Buick Park Avenue engine and engine cooling problems

“1999 BUICK PARK AVENUE. CONSUMER WRITES IN REGARDS TO DEFECTIVE PLASTIC MANIFOLDS AND REQUESTS REIMBURSEMENT FOR TWO ENGINE REPAIRS. *SMD THE CONSUMER STATED ON JULY 28, 2003, THE VEHICLE STOPPED RUNNING AND AGAIN ON NOVEMBER 13, 2014. THE CONSUMER STATED BOTH TIMES, THE MANIFOLD HAD TO BE REPLACED. *JB UPDATED 09/09/15*LJ UPDATED 03/7/16.*JB UPDATED 11/01/2017*CN”

“TL*THE CONTACT OWNS A 1999 BUICK PARK AVENUE. WHEN THE CONTACT STARTED THE IGNITION, HE SMELLED A STRONG BURNING ODOR INSIDE THE PASSENGER COMPARTMENT. IN ADDITION, OIL WAS LEAKING FROM THE ENGINE COMPARTMENT ONTO THE GROUND. THE FAILURE OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS UNKNOWN AND THE CURRENT MILEAGE WAS 41,281.”

“1999 BUICK PARK AVE V6=3800 3 8L SHOT FIRE APX. 6 FEET PER FIREMEN ON DUTY THAT WITNESSED THIS. THE MOTOR SHOOK. UPPER INTAKE, INTAKE SET, VALVE COVER SET, PCV, OIL PRESSURE SWITCH, BOTH CONVERTERS AND STILL NOT FIXED. *TR”

“MY 1999 PARK AVENUE SUDDENLY STARTED TO RUN RUFF, CAUSING ME TO TAKE THE VEHICLE TO A GM DEALER WHO REPLACED THE SPARK PLUGS AND WIRES, AS WELL AS TWO IGNITION COILS. HE STATED THAT THE PLUGS HAD INDICATION OF BURNS THAT ARE ATTRIBUTED TO ANTI FREEZE COMING IN CONTACT WITH THE PLUGS. DURING THE REPAIR HE ALSO INDICATED THAT HE NOTICED ANTI FREEZE ON THE OUTSIDE OF THE ENGINE IN THE AREA OF THE PLENUM. THE REPAIRMAN STATED THAT THIS IS A COMMON PROBLEM WITH THE 3800 MOTOR, THAT THE PLENUM LEAKS CAUSING ASSOCIATED PROBLEMS DUE TO THE ANTI FREEZE COMING IN CONTACT WITH ENGINE COMPONENTS. HE ALSO STATED THAT THIS PROBLEM CAN LEAD TO ENGINE FAILURE IF NOT CORRECTED BY REPLACEMENT OF THE PLENUM AND THE INTAKE GASKET. *TR”

“PLASTIC INTAKE MANIFOLD FAILURE OCCURRED ON 1999 BUICK PARK AVENUE WITH APPROXIMATELY 45,000 MILES. COOLANT LEAKED INTO THE ENGINE AND RESULTED IN A MISFIRE CODE IN MULTIPLE CYLINDERS. SYMPTOMS EXPERIENCED BY THE DRIVER WERE A ROUGH IDLE AT START FOR 30 SECONDS, AND THE SERVICE ENGINE SOON LIGHT WOULD COME ON, SOMETIMES STAYING ON AND SOMETIMES EXTINGUISHING AFTER 15 SECONDS. THE CAR WAS IMMEDIATELY DRIVEN FOR SERVICE. THE DEALER INITIALLY DIAGNOSED THE PROBLEM AS A COMBINATION OF DIRTY FUEL INJECTION SYSTEM (CLEANED REGULARLY, BUT STILL NEEDED TO BE CLEANED AGAIN TO CONVINCE DEALER TO RULE OUT THIS PROBLEM). WHEN PROBLEM PERSISTED IN CYLINDER #6, THE PROBLEM WAS THEN DIAGNOSED AS A FAULTY FUEL INJECTOR WHICH WAS REPLACED. WHEN THE PROBLEM PERSISTED, IT WAS NOTICED THAT COOLANT HAD GOTTEN INTO CYLINDER #6 IN SMALL AMOUNTS AND CAUSE A MISFIRE. DEALER THEN DIAGNOSED PROBLEM AS THE PLASTIC INTAKE MANIFOLD. WEB SEARCHING REVEALS THAT THIS IS A CHRONIC PROBLEM AS THE DESIGN WAS CHANGED FROM METAL TO PLASTIC. HOWEVER, THERE ARE NO CURRENT RECALLS ON THIS ISSUE. COST TO REPAIR IS APPROXIMATELY $1,700. *TR”

“TL*THE CONTACT OWNS A 1999 BUICK PARK AVENUE. THE CONTACT STATED THAT THE WARNING INDICATOR ILLUMINATED FOR THE ANTIFREEZE. WHEN HE CHECKED THE LEVEL IN THE PROPER RECEPTACLE, IT WAS EMPTY. THE VEHICLE WAS TOWED TO THE DEALER AND THEY REPLACED THE MANIFOLD AND CATALYTIC CONVERTER. THE ANTIFREEZE IS STILL LEAKING. THE CURRENT AND FAILURE MILEAGES WERE 40,000.”