[Fot] TR8 Water temperature

[Duncan Charlton]

Chris,

212F at idle?  That’s interesting.  I’ll start with the usual questions: 

1) What is the temperature you recorded at the radiator inlet?  (Having observed this, I assume you have already confirmed that the gauge is reading correctly.)

2) Is the radiator clean, inside and out?

3) Have you confirmed that there is not an air bubble trapped in the system?

4) Temperature at idle remains this high even with the cooling fan blowing?  If so, is the fan blowing the right direction?

I don’t know whether the following applies to the Rover motor you’ve got, but some Morgan owners with Triumph motors have found that the impeller of their new water pump is improperly placed on its shaft so that there is a large gap between the impeller and the housing, causing it to be very inefficient.  One guy measured 0.075” end clearance, which he was able to reduce to 0.015” by use of a spacer.
 
Duncan Charlton
Elgin, Texas USA



> On Jul 7, 2016, at 12:20 PM, MadMarx <tr4racing at googlemail.com> wrote:
> 
> Hi guys,
>  
> My TR8 is running way too hot about 212F at full speed and at idle the temps are getting that high also. I have no idea to get them down.
> Radiator core is 68x48cm x 5 cm. I suppose that should be enough. I've experiment with different restrictor plates with no change. Changing pump speed didn't help either. The difference between radiator in and outlet is 10°C (50F). Not enough I would say. Maybe making the pump more slower? It was running on a ratio of 0.8 slower than crank, currently 1:1 speed. Any ideas? 10 Liters are circulating.
>  
> Cheers
> Chris
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