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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 07-16-2009, 02:26 AM
leisey leisey is offline
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Location: Queensland
 
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Mein Auto: 318i 2000 Model
Changing water valve........

Anything to watch out for when changing the water valve (heater control valve)? Looks fairly simple, couple of hose clamps and an electrical connection. Is their any chance of getting an air lock in the cooling system? If so, how can you tell and how do you fix.

Cheers
Dave
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Old 07-16-2009, 08:03 AM
Spdu4ia Spdu4ia is offline
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Mein Auto: X5 4.4i
i am doing mine soon too... I would assume you need to bleed the cooling system . Hopefully someone can chime in.
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Old 07-16-2009, 01:39 PM
leisey leisey is offline
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Mein Auto: 318i 2000 Model
Can anyone help with bleeding cooling system?
Cheers
dave
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Old 07-16-2009, 03:43 PM
Nando779 Nando779 is offline
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Mein Auto: 2003 325Ci, Orient Blue
Quote:
Originally Posted by leisey View Post
Can anyone help with bleeding cooling system?
Cheers
dave
My guess to be safe would be to do a coolant flush. The cooling system is bled when you are SLOWLY refilling it with coolant with the bleeder screw loose.

http://www.bmw325i.net/maint_coolant_change.shtml
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  #5  
Old 07-17-2009, 12:36 AM
leisey leisey is offline
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Location: Queensland
 
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Mein Auto: 318i 2000 Model
I changed the valve and only lost a thimble full of coolant - started it up to operating temp and all seems ok. I now have air con that can cool as well as heat.
Cheers
Dave
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