BENT INTAKE VALVES, GRAND-AM 2.3 LITER SOHC VIN CODE 3
February, 22, 2006 AT 5:05 PM
I have a 1993 Grand-Am with a 2.3 liter SOHC with 120000 miles, series 3, that the timing chain went out on and bent all the intake valves. I replaced the valves, timing chain, tensioner, crank and cam gear, etc. Once back together it ran very well and I drove it for about 6 weeks with no problems. After driving the car about 5 miles one day it would not start again, the intake valves are again bent. The mechanic before my ownership installed a remanufactured head on the car about 5000 miles before I purchased it. To make sure this does not happen for the third time I would like to know what the head deck height is so I can make sure the head was not planed too far and would also like to know the crank to cam timing so I can check the valve events and degree the cam shaft. Did Pontiac have a problem with the cam timing in that the cam should be retarded on tooth or maybe that the cam timing sprocket line up hole is not in the correct place? Any information you can provide is greatly appreciated.