2000 BMW 330 heater

2000 BMW 330
106,454 MILES • 6 CYL • 2WD • MANUAL
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REESY99
  • MEMBER
  • 4 POSTS
My cars heatin was hot when driving then it would go cold when stopped have had waterpump changed thermastat an housing and two waterpipes by manifold changed after this heating was all nice and hot but now it gone cold again wot could this be?
Dec 24, 2009 at 9:42 AM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
Check the coolant level and see if the heater valve is opening up.
Dec 25, 2009 at 12:19 AM
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REESY99
  • MEMBER
  • 4 POSTS
how do i check to see if heater valve opens?
Dec 25, 2009 at 5:02 AM
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