Hi All
So its been some time since I have used the forum and I am looking or some help/ Advice please.

My Mk3 Escort has a 1.8 16 Valve Zetec.

Std Rad inlets and outlets but alloy

Alloy header with bottom and top in/outlets.

I also have my heater matrix piped in.

So the car starts and runs fine the warms up slowly by the way its running Megasquirt. It continues to warm up and get hotter and hotter until the fan comes in. I think this is kind of ok
I also think the coolant pressure gets a little high. Its not blow any pipes just yet.

So the real problem I get is when driving. The coolant temp gets quite low to the point that MS goes into warm up enrichment (i.e cold start) the max temp is 60 deg so it must be getting to cool for it to come back on.

This causes issues then I come to a stop with the engine at high idle.

Iv been though all the little bits but I am now thinking that because I have the heater matrix piped in I am some how bypassing the thermostat so the engine will not maintain 90Deg

I will do a drawing of my coolant system later BUT any of you out there with a drawing of your coolant system you are running. OR are you sort of running the same and it dose the same.

Cheers Ferd

 

I assume you have checked the thermostat hasn't jammed open? New doesn't necessarily mean this hasn't happened.

 

Yes just checked it again and its working as it should.

 

This is my coolant system

 

In the bottom hose between pump and the bottom of the rad you would have three spures. One for the header, one for the bypass and one for the heater matrix return.

Like this but with added matrix.

Credit for photo Daf

 

Thanks for the help but to be honest the above post dose not.

I have four outlets on my STD thermostat and just two on my expansion tank and to say like this but with added matrix is no help BUT thanks

 

Fit a cvh thermostat housing to your Zetec then just pipe it all up like a cvh would be, Just without the Y piece that splits to the middle if the inlet on a cvh.

 

Block the small pipe off on front of the thermostat housing
The one at the rear of the housing can go to heater matrix
Then from the matrix return back towards the header tank

 

Hi
Have now changed my system to this. Not road tested as of yet.
Got a lot of info from Westfield owners WEB site