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#11
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#12
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How is your coolant level?
On my 3.0 the same symptoms occurred but would go away when I topped off the coolant. I had a leaking coolant pipe dripping slowly and I knew when it got low because I'd lose heat. That issue has been fixed with a new pipe.
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2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed, |
#13
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My coolant level is full but i bought a new heater valve to see if that works. If not it's still a new part that the car would eventually need.
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#14
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I replaced the heater valve with a new OEM unit and it still gets cold when the motor is above 2500rpm both driving and if I rev it at a stop. If I unplug the valve the heater works great. Either I got a bad heater valve out of the box or there's a different issue.
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#15
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Do you have the automatic hvac control or the Bowden cable heater control system?
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#16
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I have the automatic climate control.
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#17
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Since the heater works when it is unplugged it could be that the valve is closed so coolant is not allowed to circulate in the heater core when it is plugged in.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#18
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True but I just am not sure why when the valve is plugged in, the heater works fine until the RPM’s go above 2500, then it gets cold.
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#19
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You will need to get a scanner that has bi directional control and see if the valve is opened or closed when the rpm is above 2500.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#20
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thankfully I work at a BMW dealership so that will be no problem.
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