Time required : 36 mins
Parts Needed
Mandatory:
New thermostat
Gasket sealant
Flat screwdriver
Spanner size 13
Optional:
New antifreeze 3 litres
Distiled water 3 litres
Circlips
As per autodata hgt uses a total of 6 litres coolant mixed with distilled water ratio 50% / 50%
Parts Needed
Mandatory:
New thermostat
Gasket sealant
Flat screwdriver
Spanner size 13
Optional:
New antifreeze 3 litres
Distiled water 3 litres
Circlips
As per autodata hgt uses a total of 6 litres coolant mixed with distilled water ratio 50% / 50%
Removal
Remove bottom hose and drain old antifreeze, try to catch all if you will not renew it
Remove ail filter housing by removing 4 screws and 1 circlip
Remove 2 bolts size 13 and 4 pipes connected to thermostat, remove temp sensor,
1 pipe is on the bottom of thermostat and not seen on picture.
Cleaning
Clean all the old gasket sealant and degrease area where thermostat bolts to.
Instalation
Screw in temp sensor to new thermostat, put a bead of gasket sealant around thermostat and bolt it on (tightening torque: autodata doesnt say specifically how much so just tighten by feel), connect pipes to thermostat, connect wire to sensor.
While gasket sealant is drying you can put everything else back together.
If they give you "wrong" thermostat which doesnt align with pipe slot perfectly like mine, simply cut a little groove in the pipe so it sits in better or take it back.
Bleeding
When sealant dries its time to fill the system and bleed it.
Bleed niple is on heater pipe, the other one is on the radiator (behind right headlight).
Fill expansion tank to the top and open bleed nipple on radiator and wait till a clear stream of coolant comes out, do the same on heater pipe nipple and drop coolant to max through nipple, start car run till fan comes on, turn off car and let it cool, top up if necessary to max. If you get no hot air commin through vents it means there is still air trapped inside so you have to repeat bleeding procedure.
Also have a look at other bleeding procedures
https://www.fiatforum.com/punto-mk2-2b-guides/347158-coolant-renewal.html
https://www.fiatforum.com/punto-mk2-2b-guides/348260-thermostat-change.html