Guest Posted April 23, 2010 Share Posted April 23, 2010 I have just had my engine out for a rebuild. It's running great, but I now have no hot water from the calorifier. Does anyone have a photo of the pipes coming off a BMC engine? I'm not sure if it has been connected properly. I have one pipe coming from the back of the engine, near the thermostat. The other pipe is coming from the front of the engine, from near the flywheel. Both pipes are warm, but not boiling hot. The water out of the calorifier is totally cold. Quote Link to comment Share on other sites More sharing options...
Jim Posted April 23, 2010 Share Posted April 23, 2010 Hi there, Make sure that the hot feed from the engine (normally the top hose) is fed into the lowest inlet on the calorifier coil. That way, if any air gets trapped, the engine pump will force it out (or so I'm told and it worked in our case) Also, make sure the coil in the calorifier is clear of blockages and there is plenty of coolant in the engine Quote Link to comment Share on other sites More sharing options...
jimbo Posted April 23, 2010 Share Posted April 23, 2010 It might just be airlocked. Try removing the highest of the two pipe carefully while the engine is running to see if water is flowing round the calorifier. Quote Link to comment Share on other sites More sharing options...
diesel falcon Posted April 23, 2010 Share Posted April 23, 2010 Oh dear, The hot pipe from the top hose should go to the top of the califior,it,s the old saying you can,t push cold water uphill,if the inlet and out let are at the same level ,then ignore this it won,t matter. don,t take a pipe off a hot engine!!!. Probably as beieng said just airlocked trev Quote Link to comment Share on other sites More sharing options...
jimbo Posted April 23, 2010 Share Posted April 23, 2010 Just to make it clear, I'm sure Trev means the top pipe of the heater coil IN the Calorifier, as the top pipe on the Calorifier it's self should be where the domestic hot water pipe is connected. And yes, only disconnect the pipe from the engine when it is relatively cold! This might actually clear your airlock whilst doing this.....Fingers crossed! Quote Link to comment Share on other sites More sharing options...
diesel falcon Posted April 23, 2010 Share Posted April 23, 2010 hi sorry not clear here,s a picture trev Quote Link to comment Share on other sites More sharing options...
Antares_9 Posted April 23, 2010 Share Posted April 23, 2010 That's a bit posh Trev, pre tap thermo blender and everything, actually it's a really good idea and so few domestic systems have one let alone a boat. Quote Link to comment Share on other sites More sharing options...
jimbo Posted April 23, 2010 Share Posted April 23, 2010 I should fit one of those into my system really, as you could melt tarmac with my hot water Quote Link to comment Share on other sites More sharing options...
diesel falcon Posted April 23, 2010 Share Posted April 23, 2010 Lol, same here when heating with the engine!! Quote Link to comment Share on other sites More sharing options...
Antares_9 Posted April 23, 2010 Share Posted April 23, 2010 At about £50 a pop they have to be a good idea, you could cook a lobster with ours after an engine run (OK on immersion) I think I might put it on the list. Another advantage is that you will probably draw less hot water from the tank and make it last a bit longer and ours is only about 25l or so. Quote Link to comment Share on other sites More sharing options...
Guest Posted April 23, 2010 Share Posted April 23, 2010 At about £50 a pop they have to be a good idea, you could cook a lobster with ours after an engine run (OK on immersion) I think I might put it on the list. Another advantage is that you will probably draw less hot water from the tank and make it last a bit longer and ours is only about 25l or so. yep, great idea. And there's even cheaper ones than this at all good plumbers merchants http://www.screwfix.com/prods/96288/Plu ... 2-15mm-TMV Quote Link to comment Share on other sites More sharing options...
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