View Full Version : Chevy 350 57l marine Engine Cooling problems

Mitchell Kreger
04-23-2004, 04:04 PM
" Will troll at idle to 5mph just fine, when brought up to cruising speed, it will overheat rather quickly. Replaced the waterpump, still having trouble. Anybody have any ideas???? "

05-17-2004, 12:11 PM
" I had the same problem this past weekend. So, if you find an answer please let me know.


Aron "

08-21-2007, 09:04 AM
"A.did impellel have any missing material?If so,hoses must be removed and flushed until stuff is removed.B.Close seacock,insert water hose(dockside water presure)Open seacock and back-flush in case of restriction.C.Has thermostat been replaced w/correct one? Ron"

08-15-2008, 11:39 PM
"my 5.7 had same problem. would run a little hot under 3k, then over would climb fast.. Found piece of impeller that had been left after replaced!!"