[Healeys] Overheating query

[i erbs]

In most cases a failed water pump will leak out of the bottom  hole when
the seals fail. Anothre way to test WP is to grab a fan blade and wiggle
it. I found a bad water pump while out driving once that way. It will
really move forward and back if the pump is bad. The easiest way to test a
thermostat is to pull it and throw it into a pot heating water on the stove
with a candy thermometer in the water. it should start to open 165-195
depending on the temp rating. I had a NOS sleeved stat in my car and it ran
great with new HD radiator and high speed fan, then it just began to
 overheat. tested the thermostat as described and it barely opened even at
boiling temp. replaced it with a non-sleeved stat and all is great.

Ira Erbs
Portland,OR
      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)
          BT7 engine and disk brakes

Please excuse random auto corrects and misspelled words

On Wed, Sep 7, 2016 at 9:19 AM, Simon Lachlan <simon.lachlan at homecall.co.uk>
wrote:

> 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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