thank you for your response. could the gas in the oil pan be from flooding the carb?gas was spitting out of (center tube?) also is it possible i spilled coolant down port in exhaust manifold when i pulled the riser elbow off.it was full of coolant and i did spill some.(well, i thought it was'nt that much)it(coolant) is not in any other cylinder ,but some fuel was. It has the alum. block off plates between riser elbow and exhaust manifold. these plates have a pin hole in them.why?