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2009 Chevrolet 1500 w/ 4.8L bent valve. Only 65,000 miles
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ryan_jdsales
My Dad was driving on interstate with cruise control set at 78 mph and all of sudden engine started making noise and dash lit up like Christmas tree. Pulled over and noticed miss and limped 5 miles back to GM shop. Codes pulled were #5 and #7 hard miss. They pulled valve cover, checked valves and said engine had burned up valves. He called and wanted to bring home (3 hrs away) so I hauled home on trailer. Rechecked their diagnosis and found that when applying air to #5 cylinder, had bad leak to exhaust. Disassembled figuring valve had burnt, and found when pulled head that #5 exhaust valve was bent and had minor contact with piston. Could barely catch w/ fingernail where valve contacted piston. Not sure why #7 set a code, nor why exhaust valve is bent on #5. Anyone have any ideas of why this happened? I did not pull head on RH side of engine to see if there was any damage.
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