Water draining from radiator on perkins 4108

[wooney]

Hi, bought a boat recently and had the gaskets changed and all starts etc. But now when I'm cruising the water seems to drain out at a rate of a couple of litres every couple of miles so have to stop and top up

Was told it nees bleeding but have no knowledge of where from or how to do it. Is this information a correct diagnosis and if so does anyone know how this can be done as told there's a few possibilities?

Thanks

[Lepke]

Are you calling the heat exchanger the radiator or do you really have a radiator? Is the 4108 in a tractor?
Sometimes the thermostat will keep the engine from filling with water and an overheat condition exists in parts of the head or block. That can cause pressure and force water out the overflow. The solution is drill about a 1/16" hole in the thermostat plate and refill the water. But probably the head gasket is wrong or improperly installed. That's a lot of water.
Where, exactly is the water draining from. The overflow, or some other part of the engine? Do you have a temperature gauge?

[wooney]

Are you calling the heat exchanger the radiator or do you really have a radiator? Is the 4108 in a tractor?
Sometimes the thermostat will keep the engine from filling with water and an overheat condition exists in parts of the head or block. That can cause pressure and force water out the overflow. The solution is drill about a 1/16" hole in the thermostat plate and refill the water. But probably the head gasket is wrong or improperly installed. That's a lot of water.
Where, exactly is the water draining from. The overflow, or some other part of the engine? Do you have a temperature gauge?

Hi thanks for the reply. It has got a temperature gage. I'll check with a friend who's at the boat where the water is coming out and get back to you with the other info.

Thanks again

[wooney]

Hi been told I need to know how to bleed the engine coolant system after its filled with with water or coolant? Does anyone know where this needs to be done or how, thanks

[Lepke]

Depending the type of thermostat, it may block some, or most of the air from leaving the engine when it's filled. That's why some thermostats come with a small hole in the plate. It allows the air out, but too small to interfere with the operation of the thermostat. If your thermostat doesn't have a hole, drill one.

[wooney]

Thanks, appreciate that, I'll try it out.