Fix Low Coolant Temperature, Replace Thermostat and Coolant Flush on Alfa Romo Giulietta 1750TBI

Описание: Hello everyone, this time I do want to fix a long standing issue with my 2011 Giulietta 1750 TBI, i.e. thermostat stuck open issue.

It is very annoying as whenever the car being driven in motorway for long time in winter, the coolant temperature will go lower and lower to a point ECU thought the temperature sensor is having some issue and decided to protect the engine by turning on radiator fan at full speed which eventually drag down the temperature further. At the same time, dashboard will become a Christmas tree and start throwing all those famous but vague and confusing message like Steering Wheel Corrector Unavailable, Check Engine, VDC Unavailable, Hill Holder Unavailable …. etc.

The error code in question is P0116-28 Water Temperature Signal failure. While clearing this fault will bring everything back to normal temporarily, the next time coolant temperature went too low the same fault will be triggered again. Not to mention running engine with temperature too low all the time may bring moisture and condensation to oil (and you may see a little bit of milkshake on the oil cap, which is not the end of the world because it is not caused by mix of coolant and engine oil but still not ideal and look scary)

This video will go through how I went through the diagnostics process, replacing the thermostat, draining and flushing the coolant on 2011 Giulietta 1750 TBI.

If you are looking to replace the thermostat on Giulietta 1.4, this video that I took on Alfa Romeo Mito 1.4 MultiAir Turbo would be relevant as they have the same thermostat assembly.    • Replace theromstat on Alfa Romeo Mito 1.4 ...  

I hope you enjoy this video. Cheers

Notes: I am not a mechanic, this video is just a share of how I did the work but doesn't mean it is the correct way. Please do your own judgement. Thanks !

00:00 Intro
02:01 Investigation
07:37 Preparing thermostat replacement
13:17 Draining coolant
16:14 Old Thermostat removal
28:10 Refitting new Thermostat
30:33 Coolant flush
34:06 Top up coolant and done