How to fix oil and water temp in 159

[Imk1ll3r]

Hello, I have a Alfa Romeo 159 2.2 jts selespeed. I change engine after last Christmas and change timing chain after one month.

Now I got a problem after I change Thermostat housing. When I driver on free highway, speed over 140 oil temp will down to 65 water temp will down to 60, leaving free highway the oil and water temp need a long time up to 110 and 90. And oil temp up to 115 water temp on 90 in too much traffic.

In the first I think is the Thermostat housing(this  thermostat housing will be working early,and same time change coolant） no good so I go a autowork change a new one（they say it's a same original).


Now I don't know how to repair the car, can you give me some ideas?


I got this car over 4 years, I buy in Sydney and I live in Adelaide.

[Imk1ll3r]

I change Thermostat。it's a working on 82 mod.
Now oil temp on 100 water temp on 90 when I'm not over 100km/h.
This is I three times to change Thermostat. First one working on 78. Next one on 91. And last one on 82.
Fans is working good.
But when I over 100km/h, water temp going down first, then is oil temp.

I think I got some problems on water systems.

On The sqare place (a alfa parts shop in Adelaide) you can buy a whole thermostat, but I always change a thermostat housing. I don't know is the thermostat and housing doesn't match.

Can you give me some ideas?

I'm sorry, I can't speak English fluently.

[Imk1ll3r]

Today check on free highway.Water hose is cold ,and Water hose don't have pressure. Next time will be change new one and check on free highway.

[Imk1ll3r]

By the way, some water hose screw slide wire. Use for Air release

[Chef Bruz]

can you let me know how this worked out?

please