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/Standard_Flyers/st10235wat-feb14_jtf_waterintrucoil_a.pdf
JUST THE FACTS StandardBrand com IntermotorImport com Water Intrusion and Premature Coil Failure UF303 Coils and Water Don t Mix On some GM models water intrusion will cause premature failure of the coil and spark plugs it s not a coil problem Signs of Premature Failure If a customer complains of a rough idle and or the MIL SES light flashes on after a rain shower or car wash this may indicate water intrusion Check for possible DTC codes P0300 through P0306 and inspect the coils and spark plugs If upon inspection of the coils a white chalk like build up on the inside and or outside of the spark plug boots is detected the coils have been damaged and must be replaced Standard hi quality UF303 coils should be installed It is also advised that the spark plugs be replaced UF303 The Remedy Water can seep past the engine cam cover and collect below the coils in the spark plug wells of the cylinder head resulting in a possible misfire To prevent this condition from reoccurring the AIP seal must be replaced with a replacement seal that redirects the water away from the engine cam cover Vehicles Involved 4 2 Inline 6 cylinder LL8 Engine VIN code S PRO LL8 2004 2007 Buick Rainier 2002 2007 Chevrolet TrailBlazer 2002 2007 GMC Envoy 2002 2004 Oldsmobile Bravada 2005 2007 Saab 9 7X ST10235WAT FEB14
