• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Ford Fiesta Forum and Ford Fiesta community dedicated to Ford Fiesta owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the Ford Fiesta Forum today!


2016 1.6 SE Overheating

Messages
4
Likes
0
City
Murphy
State
NC
Country
United States
What I Drive
2016 1.6 Ford Fiesta
#1
* I replaced coolant reservoir because the cap top broke off. The rest was stuck.
1st visit the bottom passenger side plastic pipe connector cracked & replaced.
2nd Replaced Radiator and Thermostat (not fixed)
3rd Water pump fins had disintegrated replaced fixed.
4th Had driven 1300 NC/OH/NC it overheated 10 miles from home. The plug on radiator passenger side top blew off, replaced.
5th Same tirp NC/Oh/NC blew up same place and here I am.
They say they pressure tested and exhaust tested water for blown head gasket. Negative
They Gave Up.
I just want to get going enough to get rid of it.
Ideas??
 
OP
M
Messages
4
Likes
0
City
Murphy
State
NC
Country
United States
What I Drive
2016 1.6 Ford Fiesta
Thread Starter #2
Adding now I can drive about 10 minutes to hit hi, I can turn off the engine for a 2 or 3 minutes and it's back to the middle. It's definitely is hot, the overflow is bubbling hot.
 

Handy Andy

Well-Liked Member
Premium Account
Messages
1,544
Likes
1,190
City
Grand Rapids
State
MI
Country
United States
What I Drive
2018 Ford Fiesta SE HB
#3
When you replaced the Thermostat - was the "spring side" where the wax bulb is, being mounted inside that spring - facing inward? Towards the Engine? Needs to be towards the "hot side" - with that bubble or bell valve mounted to the top - so trapped air can escape to the radiator and coolant tank.

If you followed a MK6 or MK5 type of "dual outlet" you may have installed the Thermostat incorrectly. The in the 1.6L N/A motor, that Spring needs to be towards the sources of Heat - being the Hotter fluid inside the motor - by the Water-pump so the Spring side actually goes towards the Water-pumps output - the swirling action and hot fluid will open the Spring much more quickly than installing the plug side - opposite of that spring.


1718242682823.png
So if you replaced everything else - and the thermostat was installed correctly - the the only other reason for the overheat is a bad water-pump - requiring more disassembly to replace it and that timing belt.
 
OP
M
Messages
4
Likes
0
City
Murphy
State
NC
Country
United States
What I Drive
2016 1.6 Ford Fiesta
Thread Starter #4
Water pump was replaced. I didn't do the thermostat but, it wouldn't surprise me if they shade tree shop.
Water pump vanes disengaged essentially, they replaced it.
I then drove it 1300 miles Ohio and back and 10 miles from home the auxiliary plug top of radiator passenger side blew off. Fixed
I then drove to Ohio again and back, 10 miles from home Same thing.
I then asked the guys how is the pressure released from overflow coolant tank, DunNo...
I read here the small tube off the reservoir goes to back of engine where there's a pin valve thing that can get stuck. It diverts to water pump or something. If stuck will cause overheating? I'll find come back, maybe link em.
 
OP
M
Messages
4
Likes
0
City
Murphy
State
NC
Country
United States
What I Drive
2016 1.6 Ford Fiesta
Thread Starter #5
When you replaced the Thermostat - was the "spring side" where the wax bulb is, being mounted inside that spring - facing inward? Towards the Engine? Needs to be towards the "hot side" - with that bubble or bell valve mounted to the top - so trapped air can escape to the radiator and coolant tank.

If you followed a MK6 or MK5 type of "dual outlet" you may have installed the Thermostat incorrectly. The in the 1.6L N/A motor, that Spring needs to be towards the sources of Heat - being the Hotter fluid inside the motor - by the Water-pump so the Spring side actually goes towards the Water-pumps output - the swirling action and hot fluid will open the Spring much more quickly than installing the plug side - opposite of that spring.

So if you replaced everything else - and the thermostat was installed correctly - the the only other reason for the overheat is a bad water-pump - requiring more disassembly to replace it and that timing belt.
This that valve thing from last post.
bell/bubble valve in the line back at the top of the rear exhaust side of the head - if that valve is stuck shut - air pockets can form and stay there from the pressure and there's no coolant that can flow in there to take heat away - only thru the cylinder head aluminum can the heat be dissipated. The bubble valve is where that smaller hose comes from the rear of the engine that if it's not able to drain out or burp air from that "high spot" in the cylinder head - can put the vehicle right back into the shop from it.

To fix that bubble valve it's a small pen-tip side valve that slides in and out of a larger tube in the orifice that this line mounts to - in the cylinder head - it has to be pressed out - or that pen-tip part just simply removed. There's a cost to this - it will take a little longer to warm up the vehicle because there is now a little-less restriction to the circulating fluid that the thermostat is supposed to do the job for you - that was the purpose of that check valve - to keep the air from forming and give it path out, but keep the fluid behind it from flowing out with that air.
 

Handy Andy

Well-Liked Member
Premium Account
Messages
1,544
Likes
1,190
City
Grand Rapids
State
MI
Country
United States
What I Drive
2018 Ford Fiesta SE HB
#6
Wow, Ok, I see you found an earlier post from me - so glad to know you caught that one.

The "vanes" of the water pump when it failed (woof) oftentimes shred and gouge some of that hole the pump shoots water thru once it's been thru the pump.

Because that hot water is recirculated all the time back thru the block - comes back to the water pump - it's accelerated and shot out past that thermostat - when and if the water/fluid gets too hot that thermostat opens and the hot water flows in two directions - some back to the block and the rest out to the radiator - I hope they were able to remove and flush out all that debris. That stuff can get caught in the radiator and it'll have to be backflushed to be sure it's not clogged by it.

Ok, so I hope we can rule out the Water pump then, and just stick with the Thermostat possibly in wrong, or stuck closed.

So make sure the SHAFT of that water pump is turning. That's done by the pulley, that rides on that serpentine belt, if that pump shaft can be checked - make sure the belt is tracking on it correctly.

The pressure building may also be from a head gasket seal failing. The compression air from the compression stroke can leak past the gasket into the radiator coolant jacket just from the pressure. As to - which cylinder? You'll need to have some help with this - it requires a compression test. To see which cylinder or cylinders are different from the others - then the head will need some work and may possibly be warped - but that only is if your overheat condition went on too long. It may only need to have a new gasket for the cylinder head to block.

The cause of overheating from this type of condition is from too much air in the cooling system side - not enough water to carry the heat away. It can't cool the motor and take heat away, only blow foam and hot air around
 

Similar threads



Top