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Hot water in bilge under engine


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Hello

newbie here, stepson has bought a 1980’s narrowboat with ford 1800 Diesel engine.

 

it collects water under the engine say six inches after a two hour trip, at first we thought it was coming from the prop shaft gland but it seems to be quite hot, so wondering if it’s coming from a leak in engine cooling system, the boat does have a water heater which is run from the engine so maybe this?

 

has anyone experienced something similar at what was the cause/fix?

 

Many thanks

 

Tom

 

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If its a leaky calorifier or PRV, does the water pump kick in randomly?

 

Are you loosing coolant?

 

ETA. Have you got a properly pressurised expansion vessel?

Edited by rusty69
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Not sure looking for possible causes, Stepson away for a week but will check when he's back, is the coolant circuit a closed loop or does it pull in freshwater from canal? it's a ford diesel should have mentioned that. Given the amount of water it's losing I guess it wouldn't be closed loop or it might have overheated by now?

 

It looks like it's a car engine rather than dedicated boat engine that has been modified to run in boat.

 

Thanks 

 

Tom

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Not inough info. Is it raw water cooled? Is it skin tanks and are they leaking? Pictures will help if u dont understand. Has it lost water when you open cap? Does it have a header tank?

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Is there a calorfier with the PRV piped in to the bilges so as the water heats up the PRV is letting more than an odd drip in to the bilge. I have had a PRV stick open and drained a full water tank in a couple of hours.

 

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Definitely not enough info. If you and/or he studies http://www.tb-training.co.uk/15cool.htm#bmn53

and compare the pipework and number of pumps with your engine you should be able to work out which system you have. A typical tank cooled narrowboat will have a dry exhaust and just a single car type engine water pump. It will not suck water out of the canal.

 

Be very wary, unless it is a leak in a raw (canal) water circuit 6" in the drip tray is such a loss it is likely to quickly lead to overheating.

 

As  said above this could easily be a problem with the Domestic hot water circuit.

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Some skin tank cooled boats have the tank set on the base plate, rather than the more usual place on the hull side. If such a tank has bilge water above it, I guess that bilge water would get warmed.

Edited by David Mack
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6 minutes ago, David Mack said:

Some skin tank cooled boats have the tank set on the base plate, rather than the more usual place on the hull side. If such a tank has bilge water above it, I guess that bilge water would get warmed.

 

I thought about that and assume the water was cleared out each day. If it is the same water then yes, a very probably cause and probably no coolant loss at all.

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