oh ..at the time i added some oil to the cyl ..about 1cap full amd it made about 10psi difference ..thats it ..it didnt go bang .. it occasionally puffed a little white smoke out the breather ...then about 1 week after the first smoke ..heaps came out ... i drove it home ..and fearing it had met the same end as the motor in my old car i just pulled it straight out rather than much round with the head ... cyl pressures were 1:200 2:200 3:125 4:200 ..dry test and wet test number 3 went to 135psi ..it was gradual but very rapid ..i spend a long time with my old engine trying to diagnose it ..changed head gasket etc ..so this one i just pulled the whole thing out