The Triumph Dolomite Club - Discussion Forum

sprint95m wrote: Your heater plumbing is fine Shaun.
I don't see a radiator bypass in your diagram though.

Ian.

There's no thermostat fitted Ian....Just an orifice plate to restrict the flow a little...

Why do you wish to restrict the flow Shaun?




Ian.

There is a longstanding (laws of physics defying) myth that restricting the flow through the radiator helps with cooling...

sprint95m wrote:Why do you wish to restrict the flow Shaun?

Ian.

To hold up the flow around the back of the head as there would normally be a restriction caused by the thermostat.

Now, if i put a line from the top rad spout to the thermostat housing, will the system work? Yes or no?

Alternatively, If that won't work, I'll need to do this....(just added a line from the bottom rad to the bottom of the header tank)...Yes or no?

You need an inline thermostat parallel to the rad. There is a topic with drawings about it. The overall conclusion was bin the electric waterpump and go conventional.

Jeroen.

sprint95m wrote:Why do you wish to restrict the flow Shaun?

Ian.

shaunroche wrote:To hold up the flow around the back of the head as there would normally be a restriction caused by the thermostat.

Surely that is illogical…..you are slowing the flow down and increasing the load on the pump .

shaunroche wrote:Now, if i put a line from the top rad spout to the thermostat housing, will the system work? Yes or no?

No.

shaunroche wrote:Alternatively, If that won't work, I'll need to do this....(just added a line from the bottom rad to the bottom of the header tank)...Yes or no?

No.
The answer is no because as Jeroen has already said, you need a thermostat.
Please read this thread I posted a link to from the Sideways Technologies forum……
http://sideways-technologies.co.uk/foru ... entry96300

Properly done, fitting an electric coolant pump is worthwhile.
The engine is much more free revving, akin to fitting a lightened flywheel .
I am going to use an EMP Stewart pump from the USA. These pump 200 litre/minute and are rated at 10,000 hours.
(200 l/min is akin to a Ford Zetec petrol engine water pump's performance.)
Even if you offered me tens of thousands of pounds I wouldn't fit another Davies, Craig product.




Ian.

Cheers for taking the time to answer Ian, I really appreciate it!

I understand, finally what you've done now with the remote thermostat.

However, completely ignoring the over cooling issue, from a flow and air lock point of view, will my last layout diagram work, because if I remember correctly, your layout worked, it just over cooled, correct?

viewtopic.php?f=4&t=30938&start=15

Some more info.

Jeroen

shaunroche wrote:if I remember correctly, your layout worked, it just over cooled, correct?

That is correct.



Ian.

shaunroche wrote:Hi chaps, i have a capillary temp gauge fitted and i have noticed that when up to temperature, just now and again it will jump up ten degrees from say 80 to 90 degrees, hover there for a bit and then back down to 80 where it will stay for a while before doing it again.

This gives me the impression that there is air in the system...Or the head gasket is knackered, so not very happy with that prospect!

Additionally, how much water should there be in the header tank?
I checked the other day and there was a bit in the bottom....I then over filled it and it's obviously started coming out as you would expect!

Cheers as ever o'wise ones!

Shaun

just spotted this thread,is your temp gauge a combined one with oil gauge from an MG,to fit it did you just modify the plate at the back one the head ?,its a job now i have to work on the engine i mite do

Dave

Hi Dave, no it's a Smith's dedicated temp gauge with the sensor fitted into the thermostat housing....

shaunroche wrote:Hi Dave, no it's a Smith's dedicated temp gauge with the sensor fitted into the thermostat housing....

Shaun

okay thanks,do you know if there's enough room to fit a capillary gauge to the back of the head ?

Dave

new to this wrote:

shaunroche wrote:Hi Dave, no it's a Smith's dedicated temp gauge with the sensor fitted into the thermostat housing....

Shaun

okay thanks,do you know if there's enough room to fit a capillary gauge to the back of the head ?

Dave

Hi Dave, I don't think there is room for anything other than a standard sender due to the lack of depth.....Rob from Sprintspeed will tell you better as he makes a modified back plate....

http://www.sprintspeed.co.uk/pages/#&panel1-2

shaunroche wrote:

new to this wrote:

shaunroche wrote:Hi Dave, no it's a Smith's dedicated temp gauge with the sensor fitted into the thermostat housing....

Shaun

okay thanks,do you know if there's enough room to fit a capillary gauge to the back of the head ?

Dave

Hi Dave, I don't think there is room for anything other than a standard sender due to the lack of depth.....Rob from Sprintspeed will tell you better as he makes a modified back plate....

http://www.sprintspeed.co.uk/pages/#&panel1-2

Shaun

thanks,ill measure how much room there is,and get in touch with him

thanks Dave

Shaun, you any further on with this?


Ian.