do you have to bleed collong system 156 2.5?? - Alfa Romeo Forum
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Help do you have to bleed collong system 156 2.5??

Was hoping to drain out water tomorrow after i have filled up is there any bleed valve screw etc have climate etc 51 plate 2.5 156 please help thanks
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Member car:

a very dirty car

No bleeding required, the system is self-bleeding.
Top is up as much as possible and run the engine with the expansion tank cap off. You will see that the tank circulates water through the system. As the water level drops add more (preferably add coolant/anti-freeze).
Squeeze the top hose to help flow bubbles through as thsi is where they gather.
Wait until the engine warms so the thermostat opens and you may get a drop in level again. Top up on last time and go for a drive. Check again after the drive and regularly for the next few days.
Don't let the engine get too hot with the expansion tank cap off or it will boil over.
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The rad has a "bleed point" at the top of it but its just to fill the rad up when you do the initial top up. Its at the top left of the rad as you look at the car from the front. Make sure when you run it up that the fans and heat are on full as it helps to circulate the water round the system.
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156 , bleed , collong , system

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