Rooney

Hi everyone, Problem sorted the expansion bottle was leaking at the top pipe entry so bottle could not pressurise, i replaced with a Shire bottle of same size and all is well. Bleeding the horizontal calorifier i did by fitting a water pump in the return pipe to circulate coolant through cal and engine, then removed it ,worked a treat. So all good and a big thankyou to all of you for your help and advise. Happy boating A happy Mick Hi everyone, Problem sorted the expansion bottle was leaking at the top pipe entry so bottle could not pressurise, i replaced with a Shire bottle of same size and all is well. Bleeding the horizontal calorifier i did by fitting a water pump in the return pipe to circulate coolant through cal and engine, then removed it ,worked a treat. So all good and a big thankyou to all of you for your help and advise. Happy boating A happy Mick

HI , Pleased you got it sorted

Thanks Tony i will them a try.

Thanks for that Paul, a big help

Hi again TD, Sounds like they are very efficient pumps, so i will forget that idea. Thanks again

Hi again Tony, I have not tried your above method yet as my bottle is probably to small because it goes from full to the top to being empty when engine cold. Also been thinking as my skin tanks are about 350-400mm below top of engine and the twin coil horizontal calorifier ( by passed at moment ) is 350mm to pipe connections above top of engine, is this a lot to ask of the engine coolant pump. Could i fit a extra pump somewhere to assist with the flow. thanks

Hello again TD, I think i do need a larger bottle ie 5 ltr but can only find header not expansion on internet so far. Will persevere. Thanks again

Hi Dave, My coolant from engine flows into top of stb tank out of bottom through a channel welded to hull floor and into bottom of port tank then returns to engine out of top. Would be big job to change. Thanks for the info.

Hi Tony, That sounds like a good method. Thanks again

Hi TD, I will calculate volume of the skin tanks but at 4% expansion my bottle may be a bit small. Thanks again.

Hi Tony, expansion bottle size could be the problem as it is only about one and half ltr and when topped up to max line not a lot left. Skin tanks quite large, will look in to this more. Many thanks

Hi Slim, Calorifier was empty when i removed the pipes so plenty of air in there. My main problem is the engine expansion tank filling up when engine gets hot, but many thanks for giving it some thought.

Hi TD, I bypassed the calorifier by connecting both pipes together and water flowed through heating them up quickly. Hardly any coolant came out of cal so full of air. On the down side coolant in expansion bottle still rose by about 80mm. I am now at a loss thinking is it piped up correctly ie hot from engine in to stb skin tank near top and cold out of port tank near top.

Hi TD, I did check the flow between skin tanks and it was fine. I think your probably right about the air lock, must be in calorifier, i may bypass the calorifier just to try it next week and let you know. thanks again

The skin tanks are self bleeding in to the expansion bottle, the calorifier i will give another go as it is horizontal and both pipes at same level. Thanks for that i will give it a try. fingers crossed.

High everyone, I am new to canal boating but i do know the basic workings of a diesel engines. I have bought a three and a half year old wide beam that had only made one ten hour trip from new then not used. To my amazement when engine gets to temperature it blows coolant in to expansion bottle. The coolant does not appear to circulate through the hull tanks, I have replaced thermostat / checked water pump works / checked flow between hull tanks / flow through engine by removing thermostat and turning the pump by battery drill, but when engine is run the outlet pipe gets hot at manifold and gradually works its way down the pipe to the starboard tank which all gets hot. I would have thought if the coolant was circulating both tanks should get warm, by this time expansion bottle full to the top when on max level to start with. No flow through the caloriefire either. No oil in coolant and no coolant in oil so cylinder head seems fine. I seem to think this problem is from new. Any ideas much appreciated