Car was losing coolant so took expansion tank out cracked so replaced the tank but still losing coolant at my wits end any help advice appreciated 

This can be literally anything varying from a defective coolant reservoir cap to a cracked engine block.

To diagnose the problem further diagnosis is required. You should start by performing a pressure and vacuum test of the coolant system to determine whether there is a coolant leak or the engine is burning the coolant.


Take into account that being a 1.0 ECOboost based on age a 2015 car will be due (or possibly already overdue) to replace both wetbelts. If the wetbelts do not have been replaced yet and an internal coolant leak is diagnosed, it may be cheaper to replace the engine.

Wetbelts already been done 6 k miles ago 

Did you replace the cap with the reservoir?  Is it genuine Ford or cheap aftermarket?

Since the wetbelts are already replaced, I suggest to perform a pressure and vauum test of the cooling system to diagnose the problem.

Known coolant leaks of the 1.0 ECOboost are:

* Coolant reservoir (cracks).
* Coolant reservoir cap (pressure relief valve becomes stuck).
* Timing cover O-ring (split or deteriorated).
* Water pump (worn mechanical seal).
* Thermostat housing (deteriorated or deformed).
* Degas hose (in this case the new hose design should be already present).
* Failed head gasket.
* Cracked cylinder head.
* Cracked engine block.

More than enough possible causes to investigate.

8 minutes ago, TomsFocus said:

Did you replace the cap with the reservoir?  Is it genuine Ford or cheap aftermarket?

No i didn't but my old reservoir was cracked underneath reason for new one

6 minutes ago, Lestalad said:

No i didn't but my old reservoir was cracked underneath reason for new one

The caps are a known weak point on these.  That would be my next replacement unless you're going to pressure test the system as suggested above.  Get a Ford one though, no point trying to save a couple of quid on a cheaper version.

Would post a video of water leaking under car but wont allow videos 

1 minute ago, Lestalad said:

Would post a video of water leaking under car but wont allow videos 

Near gearbox mount water dripping out.

17 minutes ago, Lestalad said:

Would post a video of water leaking under car but wont allow videos 

Can upload to YouTube etc then link here.

Can you get a higher picture at all?  Thermostat housing is just above gearbox so that's looking likely.

10 minutes ago, TomsFocus said:

Can upload to YouTube etc then link here.

Can you get a higher picture at all?  Thermostat housing is just above gearbox so that's looking likely.

Just at work now will.try after thanks fir help

You should not drive the car with this coolant leak.

These engines have the bad habit to overheat without a single warning on the dashboard. When the coolant leaks out of the system an air pocket will form around the coolant temperature sensor. Since air does not conduct heat nearly as good as coolant the engine can overheat without a single warning.

Once the coolant temperature on the dashboard rises and a warning is displayed it is usually already too late. 

Coolant dripping of this going down pips from above 

We need to see the above, not down there.

Could be heater matrix hoses if it's running down the bulkhead.

Drivers side floor bit wet too

If there's coolant inside then that's a heater matrix leak.

It could be leaking underneath through the air con drain.  Both heater matrix and AC evaporator are in the same box.

Ok tha you for all asvi e and help will see how much he it costs dreading the price.

Can I use radweld extra to fix leaks ?

21 minutes ago, Lestalad said:

Can I use radweld extra to fix leaks ?

Yes, but I don't recommend it.

Can go hard inside the engine and create restrictions that stop the coolant flowing.  Ultimately blowing the headgasket.

It's fine for a cheap old car that you're going to scrap, but I don't recommend it on a decent car.

31 minutes ago, TomsFocus said:

Yes, but I don't recommend it.

Can go hard inside the engine and create restrictions that stop the coolant flowing.  Ultimately blowing the headgasket.

It's fine for a cheap old car that you're going to scrap, but I don't recommend it on a decent car.

Ok ty I will.g8ve it a miss then . Any idea of price to fix nowadays a rough estimate.

3 hours ago, Lestalad said:

Ok ty I will.g8ve it a miss then . Any idea of price to fix nowadays a rough estimate.

If it needs a while new matrix then it'll be over £500.  Probably nearer £750 all in nowadays.  Takes hours to remove the dashboard for access.

Some of these have a pipe joint just above the clutch pedal.  If it's leaking from that joint then it can be fixed for under £100.

https://youtube.com/shorts/0EZZ-UkqMhM?si=zp8hViLHHSJ5iHa7

Best I could do lol found leak i think 

5 minutes ago, Lestalad said:

https://youtube.com/shorts/0EZZ-UkqMhM?si=zp8hViLHHSJ5iHa7

Best I could do lol found leak i think 

Ok, that is the heater matrix hoses, where they go through the bulkhead.  Can't tell whether they're actually broken or just loose.  Much cheaper to fix than a whole new matrix.

Worth checking whether it is coolant in the footwell or if it's just rain water.  The coolant might have squirted through the bulkhead if the pipes are damaged right on the edge.  Generally I wouldn't expect an external leak like that to end up inside the car though.

22 minutes ago, TomsFocus said:

Ok, that is the heater matrix hoses, where they go through the bulkhead.  Can't tell whether they're actually broken or just loose.  Much cheaper to fix than a whole new matrix.

Worth checking whether it is coolant in the footwell or if it's just rain water.  The coolant might have squirted through the bulkhead if the pipes are damaged right on the edge.  Generally I wouldn't expect an external leak like that to end up inside the car though.

It's like a oily wet if ya get my drift in footwell

1 minute ago, Lestalad said:

It's like a oily wet if ya get my drift in footwell

I no its weird but doesn't taste like water had to try a bit lol