Welcome,

It could be bad water pump or obstruction in radiators/head.

 

Thank you, I will probably flush the whole cooling system to see if it helps

 

if its the same valve thing like on the 1.9 JTD then

GATES EMH904 Oil Trap
EAN 5400608405019

OE 06A129101A

i know ... meant for VW

 

Hey, thank you! However the part itself I could find, but does it need to be secured with something to the oil catch can or a clip on?

Or Is it freely there so if the pressure rises the oil vapors go out and around?

 

hose clamp? are your looking for that?

 

Just need to know if there is one or if the part sits in by itself sorry if my grammar/knowledge is wrong

 

Coolant pump impeller can slip at higher engine speeds. If overheating is from higher throttle loads and not higher engine speeds, that suggests something to do with cooling system.

If coolant hoses still contain pressure before first start up in morning, that is an indicator of cylinder head gasket failure.

If hoses do not remain hard, it may just be a restriction of the cooling system. That may be partial blockage in radiator core or a restriction stopping air passing radiator core. However, the 60-70° you record may be an indication of combustion gas stopping the temperature sensor being immersed in coolant.

If engine was cold, make sure there is no pressure in cooling system. Start engine and run it until it becomes warmer. Squeeze radiator hoses to feel how long it takes for cooling system to pressurise. How long does it take? What is the temperature reading at that time?

 

Hello, thank you for the tips! I'll try them out asap

For now I got a graph for the temp overtime if someone wants to check it aswell

The big spike is after I went up a steep hill

 

Üdv
Én megnézem a vízhűtő méretét és állapotát. Létezik hozzá több méret is szélességben 25-43 mm és nem mindegy melyik van benne.
Azonkívül megnézném a ventilátorok kellő időben és sebességgel működnek vagy nem.

 

Hey everyone, little update here after a long time.



Since I wanted to look at the car either way I changed the thermostat and radiator (took me the whole day) but managed to do it + ofc flushed the system...

This is how the old thermostat looked

Not only is the o-ring gone but... There is no thermostat too?! A friend who repairs Alfas for some time now said that on the cheaper thermostats it's better to throw it out and just leave the housing so I guess that's why

My problem is 99% fixed, still boiled one more time but no overheating when driving in straights and temp is always around 70-80 but sometimes still drops to 50 on the gauge

However I have found some questionable choices on the car like this... Where this part that comes from turbo to airbox is damaged, instead of replacing it they duck tapped it together and stuck in a metal pipe 😵‍💫

Ordering new part asap


And last thing I had problems with was my turbo overboosting because the VNT solenoid was bad, replaced it with new and works great... But it's from a 159 so it doesn't fit original bolts, Will have to find a workaround 😅

I want to thank everyone who gave me any ideas on what it could be and what I could try .

 

So let's assume the overheating was a blocked radiator and the underheating was a missing thermostat. Why is it now still not getting up to temperature 90degC ?

 

I'm having the same question... however if I remember correctly the temp gauge is not accurate at all for the engine temp, I'll fiddle a bit more with the diagnostics and let you know with results



Btw the thermostat isn't from Mahle but GATES which could also be different in operating temperature, haven't checked before buying 😅

 

Assuming you bought the correct thermostat it should be right, 88degC +/- 2degC. Check the ECM coolant temp value then the sensor.

 

Thermo was terrible
The pipe thing...

 

Back after a ride, car was about 86-89 degrees C for the most part, just took long to warm up

 

My giulietta thermostat has the same rating. I checked yesterday on the way home, normal 40mph driving 88-89 degC and a peak of 94degC after a minute on the motorway.

The temperature gauge works on limits and ranges rather than following the temperature sensor which is why any movement away from the normal position signals problems. My needle was already up to the '90degC' mark when sensor was reading 72degC.