Nova man, Yes we checked deck hight and quench while assembling the engine. No marks on pistons or binding while turning over crankshaft. I had a well known local machinist come over tonight to pick his brain. We installed the head with the old gasket and put compressed air to each cylinder. The # 6 cylinder had air leaking out of the intake port. We tapped on the top of the intake valve with a dead blow hammer while the air was still in the cylinder to see if something was between the valve and the seat, still keaked air. Sounds like a poor valve job. But we are going to have the head pressure tested first to eliminate one thing in this mysteriuos engine. the valve seats were not replaced, but a three angle valve job was performed, and new valves also with three angle cut installed with new springs, locks, retainers, and split bronze liners pressed in. We'll see after the presure test. Running out of ideas though. I appreciate the input from everyone. The only thing I can come up with is that the top side of the head is not clamping down tightly to the block and then water can run down the top water jacket hole down into the cylinders. I did check bolt length and they are not too long. There seems to be no other explanation as to all four cylinders getting water in them. Remember, water comes out of the spark plug hole when the piston is at TDC, or down in the cylinder, so I think I can rule out the block being cracked. Water would not rise up the cylinder up over the piston into the combustion chamber when piston is at TDC. Keep in mind this engine hasn't even fired yet! Still looking for ideas. Keep them coming. I'll update after the presure test tommorow. Thanks everyone.
Lugnut
|