[Fot] TR8 Water temperature

[Gary Klein]

Chris,

 

My street TR8 had a heating problem that I discovered was caused by a bad gasket at the water pump.  The PO had installed a new pump but the gasket did not have a hole for the bypass line.  It always ran hot and coolant would blow past the cap.  Also, there were a bunch of pumps made overseas that did not even have the bypass hole cast into the pump.  Maybe you have this situation, too?

Gary

 

From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of MadMarx
Sent: Saturday, July 9, 2016 11:07 AM
To: 'Greg Blake'; 'MadMarx'
Cc: 'FOT List'
Subject: Re: [Fot] TR8 Water temperature

 

The cap is a 23 psi cap.

I have an expansion tank which is plumbed at the sucktion side of the lower pump hose and has a 2nd connection at the top of the radiator to remove air from the system.

I don’t understand the air flow question. The car has an inlet on front, and an airbox around the radiator to force the air through.

 

 

Von: Greg Blake [mailto:gblake58tr3 at icloud.com] 
Gesendet: Samstag, 9. Juli 2016 15:49
An: MadMarx <tr4racing at googlemail.com>
Betreff: Re: [Fot] TR8 Water temperature

 

questions. 

What pressure are you running?

Do you have a pressurized expansion tank plumed into the system that takes water from the back of one of the heads then recirculates to the pump?

What kind of air flow are you getting through the radiator?

Sent from my iPhone


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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