alan_in_vt
New member
I am starting a new thread here as we have worked on the problem and are at a new spot. Engines are Crusader 454 350hp 1986 with 1,500 hours in a Bluewater 51.
Originally had oil or gas like sheen coming out in exhaust water of port engine. Thought it might be running rich so we started with replacing auto choke...no change. Rebuilt carb...no change. Switched carbs with other engine....no change thus figured not the carb running rich with gas. Sheen really does not have a gas odor. Coolant level good, no water in oil. Compression test showed one cylinder at 135 and the rest in the 150s. The sheen in water kept getting worse. Thought it might be a valve stem seal. Had a valve job done and the problem still gets worse. Noticed a considerable puffing from the valve breather tubes when detached from carb. Maybe 5 times more than the other engine. The oil sheen is now bad enough to be considered a water pollution problem. Suggestions as to the problem and fix are welcomed. I am now considering engine block exchange. Are there any other alternatives? What do you recommend if we have to put in a rebuilt engine.
Originally had oil or gas like sheen coming out in exhaust water of port engine. Thought it might be running rich so we started with replacing auto choke...no change. Rebuilt carb...no change. Switched carbs with other engine....no change thus figured not the carb running rich with gas. Sheen really does not have a gas odor. Coolant level good, no water in oil. Compression test showed one cylinder at 135 and the rest in the 150s. The sheen in water kept getting worse. Thought it might be a valve stem seal. Had a valve job done and the problem still gets worse. Noticed a considerable puffing from the valve breather tubes when detached from carb. Maybe 5 times more than the other engine. The oil sheen is now bad enough to be considered a water pollution problem. Suggestions as to the problem and fix are welcomed. I am now considering engine block exchange. Are there any other alternatives? What do you recommend if we have to put in a rebuilt engine.