wellcraft33
Member
Hello
I have (2) crusaders 454XL generation VI, they are raw water cooled. The port engine is fine, but the starboard engine overheats at high RPMs. I have been chasing the cause of this overheating for about a month now and I am running out of ideas. I need help.
I have done the following:
1- replaced manifolds and risers.
2- Replaced U-cooler
3- replaced both raw water pump and engine circulating pump.
4- replace engine water pump hose.
5- replaced 1 1/4 intake water hose and cleaned and rebuild the Perko water stainer.
I removed the thermostat and the same thing happens, it overheats at a load. I replaced the thermostat back in the engine.
I noticed that I have a pressure relief valve inside the thermostat housing and I was wondering if anybody had any information on it. Should I remove it? Do I need it. It seems to restrict the water flow at low RPMs I don't know what other purpose it may have.
Other than that, I hate to think that I may have a bad head gasket or a cracked block. Other than the overheating the engine seems to be running smooth.
If anybody has any ideas, I would appreciate it.
I have (2) crusaders 454XL generation VI, they are raw water cooled. The port engine is fine, but the starboard engine overheats at high RPMs. I have been chasing the cause of this overheating for about a month now and I am running out of ideas. I need help.
I have done the following:
1- replaced manifolds and risers.
2- Replaced U-cooler
3- replaced both raw water pump and engine circulating pump.
4- replace engine water pump hose.
5- replaced 1 1/4 intake water hose and cleaned and rebuild the Perko water stainer.
I removed the thermostat and the same thing happens, it overheats at a load. I replaced the thermostat back in the engine.
I noticed that I have a pressure relief valve inside the thermostat housing and I was wondering if anybody had any information on it. Should I remove it? Do I need it. It seems to restrict the water flow at low RPMs I don't know what other purpose it may have.
Other than that, I hate to think that I may have a bad head gasket or a cracked block. Other than the overheating the engine seems to be running smooth.
If anybody has any ideas, I would appreciate it.