Water level

[Fanch]

Hello

 

I own a Cat 7 Super Sprint (year 1990) Ford XF engine

I fitted a closed header circuit with a thermostat housing from Fiesta and a Rover headertank (with new cap) like picture :

http://e.joucla.free.fr/Entretie/refroimhamon2.jpg

 

my problem : when I drive a long time at high rev, the water overflows (a little) , but the temperature stays normal (80°C).

after many test, It seems the good level in water tank is when it is empty !!!

 

is it normal Doctor ?

Thanks for any information

 

Sorry for my poor language ! 😳

[John Hughes]

Hi Fanch

 

I've done the same mod and found that it lost water until I replaced the pressure cap on the thermostat housing with a blank cap without the pressure release. I then ran the small "overflow" pipe into the connector on the top / front of the header tank to bleed air back to the tank.

 

The plastic "Rover" cap has a pressure release valve in it, I think at 1.4 bar

 

No problems with water loss or over heating since.

 

John

[Fanch]

Hi John

 

Thanks for your answer

 

I made the same mod except my thermostat housing is without cap ( without pressure cap) ( from Fiesta donor) :my problem is not over heating but water loss

 

Fanch

[Big Brother]

Franch,

I have the same set up and had the same problem too.

I managed to cure it be not using the water level mark on the expansion bottle.

 

I jack up the rear of the car as high as I can get it and slowly fill via the bottle.

This removes any airlocks.

When the bottle starts to fill I level the car and top up the water level to about 3/4" (20mm) from the original mark on the bottle.

This allows a slightly bigger expansion space and stops the water overflowing.

Try it and if it cures the problem you just need to mark your new level on the bottle

 

Good luck

 

Steve

 

 

Se7en-Up!

One day, all cars will be made this way!

 

[Fanch]

Thanks Steve

 

I'll try this method; I think is an airlocks problem;(when heating, there is an air expansion)

 

your solution seems good.

 

Fanch