01-06-11, 04:58 PM
My 2001 Catera Timing Belt Tensioner failed which resulted in bent valves. I removed the heads and replaced the valves lapping them in (old school) I then reassembled the engine with new head gasket, new heat bolts, new cam bolts, new water pump, new timing belt and tensioners, all new gaskets and seal. I did an oil change and coolant change. The final step was to start the engine which it did and run fine with the exception of the lifters noise. I assume noise was due to the hydraulic lifters needing time to build up oil unfortunately not the case after approx 10min of the engine stop with a ‘KLUNK!” after further investigation I have seized the intake Cam on the driver’s side destroying the head. My question is what did i done wrong to cause this issue can the head gasket be miss assembled blocking an oil gallery or do I have something else wrong with the engine?