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Solving a cooling issue

  • 13-01-2018 11:59am
    #1
    zurbfoundation
    Registered Users, Registered Users 2 Posts: 816 ✭✭✭


    intermittent temp rise on a 1.6 petrol Toyota 4afe - Story so far is i have replaced the rad and flushed the coolant. i had thought this did the trick for a while, but then temp rise happened again.

    Rad not getting hot, input hose is, outlet hose is not.

    Thermostat is not too old, couple of years id say - it ran fine after installation for this time period.

    Water pump had been replaced but this is many years ago - i have no more info on that.

    So today i ran the car till temp up to normal - disconnected the hose into the rad and restarted the engine, thermostat should have been open by now - but no coolant was being pumped.

    So I am thinking either the pump is gone or the thermostat is gone.

    Thermostat would be an easier fix - so i was thinking of removing the thermostat and running it - this would rule out if it is gone or stuck - and if the water still didnt circulate I could safely say its the water pump

    What say you to all that?


Comments

  • #2
    Tea drinker
    Registered Users, Registered Users 2 Posts: 2,817 ✭✭✭Tea drinker


    Sounds like a plan. Probably cheapest / easiest way of diagnosing it.
    Only other thing I can think... have you any reason to think a serious blockage exists ?
    You've already flushed it so *should* be clear.


  • #3
    zurbfoundation
    Registered Users, Registered Users 2 Posts: 816 ✭✭✭zurbfoundation


    Tea drinker wrote: »
    Sounds like a plan. Probably cheapest / easiest way of diagnosing it.
    Only other thing I can think... have you any reason to think a serious blockage exists ?
    You've already flushed it so *should* be clear.

    That was the reason i changed the rad a few months back, though it wasnt at full capacity _ but flushed it first then new rad fitted and fresh coolant obviously and was om for a while- thats why i suspect the pump more so - also the previous owner was using water unstead of coolant for a large part of the cars 22 years so who knows what shape the impelers are on it- i actually have a pump there _ its just a much bigger job- will remove thermo and report back


  • #4
    zurbfoundation
    Registered Users, Registered Users 2 Posts: 816 ✭✭✭zurbfoundation


    thermostat out, engine on, hose to rad disconnected and nothing coming out of it - so no circulation means dead pump i suppose


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