[Healeys] Overheating query

[Bob Spidell]

Sounds like your original design Smiths thermostat failed closed. 

Bob 

----- Original Message -----

From: "Simon Lachlan" <simon.lachlan at homecall.co.uk> 
To: "Healey List" <healeys at autox.team.net> 
Sent: Wednesday, September 7, 2016 9:19:41 AM 
Subject: [Healeys] Overheating query 



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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