[Healeys] Overheating query

[Oudesluys]

I would start checking the operation of the thermostat in a pan of water 
with a proper lab thermometer. Slowly heat up the water and check the 
opening temperature of the thermostat.
If OK remove the water pump and check the vanes, although when the vanes 
disappear the problem should arise gradually, not sudden.
Kees Oudesluijs



Op 7-9-2016 om 18:19 schreef Simon Lachlan:
>
> Hi,
>
> This isn’t the usual one ....”my car always runs hot; what’s the 
> cure?” etc
>
> No, this is my very own original.....
>
> Background:-
>
> 1)The car, MkII BT7, has never had overheating issues before today.
>
> 2)It has a new, 12 month, modern design radiator.
>
> 3)It has the correct type(original design) Smiths sleeved thermostat. 
> (5 years old +/-).
>
> 4)The waterpump was in the car when I bought the car +/- 25 yrs ago.
>
> Today’s symptoms:-
>
> 1)I took it out to the pub today and, on returning, I noticed that 
> there was HEAT and then that the gauge was off the scale.
>
> 2)There was plenty of coolant in the rad and it didn’t seem overly hot.
>
> 3)I didn’t have much time, but I got the impression that the rad was 
> not blowing steam or making more of a “cooling-off noise” than usual.
>
> 4)I also got the impression that the engine was hotter than the rad.
>
> Is this typical of a failed water pump?
>
> How can one differentiate between thermostat issues and waterpump issues?
>
> Any ideas?
>
> Simon
>
>
>
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