water heating issue any ideas

[Trix]

I wonder if anyone can help me with this ?

 

I have had a few leak issues on my engine all fairly minor which i seem to have cured , then two days ago the engine temp went high , i stopped took off the header tank cap had a bit of steam come out lots of gurgling then once it settled i topped it up restarted and all seamed well , then today i got home from work run engine for an hour and the water was still cold. Engine temp was normal one hose to califorier (spelling) was hot other was warm then i checked hoses to cooling tank top hot bottom stone cold . took the cap off the heat exchanger and there was very little water in it , topped it up ran engine again water only just tepid im thinking maybe there is a blockage in the pipe work , does that sound right? There does seem to be quite a bit of rust in the metal header tank but the water is clear , im not sure where to start with it , drain the system and flush it ? Im assuming if it was a pump issue the engine would over heat . I tried running with the cap off in case of an air lock but does not seemed to have changed anything ..

[Laurie Booth]

Have you checked your thermostat?

[Trix]

The saga continues got up this morning and checked header tank , water down so topped up run engine up to temperature and water boiling hot , didn't have time before work to look at anything else but will run again tonight and see what I have then , I'm now thinking air lock

[smileypete]

Would be handy to know more details of the engine, cooling system, pics if possible, whether it's run fine up to now.

 

cheers, Pete.

~smpt~

[Heat Exchanger Guy]

Assuming it isn't the Thermostat as Laurie suggested then it could be an air lock. As stated above some details about the engine may be beneficial.