"Hiya, i been reading your for
"Hiya, i been reading your forum for quite a while and wondered if there is anyone who can suggest whats wrong here, started last year with cylinder heads corroding, so decided to rip the motor out and do a rebuild, the problem being i have to send to the good old USA for all my gear. i have a formula ls 242 with 502 cid mercruiser and bravo 1. so i have fitted new: two dart iron eagle heads, piston rings, shells, raw water impeller, circulating water pump, therm housing and therm, valves, pushrods, gaskets, bolts all being the proper marine gear, cost me a fortune but i love the boat. ran the motor up with drive in a tank, starts and runs beautiful 65 psi oil pressure every thing ok for about 20 mins then temp starts to rise oil presure starts to drop to about 30 psi, i let temp get to 220 then cut the motor, changed oil after rebuild and tried her again, same thing. took out the therm and tried her again, same thing, getting good flow out of exhausts headers warm but not hot. wondered if there could be a blockage in the engine block. what do you think ??? cheers Ged"
"Hiya, i been reading your forum for quite a while and wondered if there is anyone who can suggest whats wrong here, started last year with cylinder heads corroding, so decided to rip the motor out and do a rebuild, the problem being i have to send to the good old USA for all my gear. i have a formula ls 242 with 502 cid mercruiser and bravo 1. so i have fitted new: two dart iron eagle heads, piston rings, shells, raw water impeller, circulating water pump, therm housing and therm, valves, pushrods, gaskets, bolts all being the proper marine gear, cost me a fortune but i love the boat. ran the motor up with drive in a tank, starts and runs beautiful 65 psi oil pressure every thing ok for about 20 mins then temp starts to rise oil presure starts to drop to about 30 psi, i let temp get to 220 then cut the motor, changed oil after rebuild and tried her again, same thing. took out the therm and tried her again, same thing, getting good flow out of exhausts headers warm but not hot. wondered if there could be a blockage in the engine block. what do you think ??? cheers Ged"