Parts Required: Heater valve, heater hoses, engine coolant
Performance Gain: Heat volition work again
Complementary Modification: Change thermostat and affluent cooling system
BMW E53 X5 models utilize a heater control valve that controls the flow of hot coolant to the heater core.
If your vehicle has no rut and the cooling organisation is properly bled, the valve may be faulty (stuck closed). You may likewise have a situation where the vehicle has heat all the fourth dimension. This may be a valve that is stuck open up. In this tech article, I will show yous how to replace and test your heater control valve.
Bleed the cooling arrangement. See our tech article on cooling system draining and filling.
Hot tip
Work with a cool engine
//
Project Photos
Figure 1 This photo shows the location of the heater control valve (green arrow). It is located at the left side of the firewall, higher up the heater hoses.
Figure 2 To replace the heater control valve, start past removing the heater hoses (green arrows) from the plastic mountain (yellow arrow). And so disconnect the electrical connector by pressing the release tab (red arrow) and pulling it off the valve.
Figure three So, pull the heater valve out of the mount. Pull the front out first, upwardly.
Figure four Go along to elevator the valve out of the subclass at an angle toward the engine (red arrow), while pulling it out of the rear mount. Exist careful not to lose the condom mounting grommets (xanthous arrows).
Figure 5 Loosen all 3 heater hose clamps (greenish arrows). And so, remove the front heater hose. If your vehicle has standard climate control, there volition exist only two hoses.
Figure 6 With the forepart hose removed (dark-green arrow) you lot now take a fiddling more room to grab the rear hoses. Remove both rear hoses, noting installation position.
Figure vii Remove the heater valve from the vehicle and install the hoses on the new ane. Then install the heater valve into the mount and connect the electrical connector. When installing, feed the valve into the subclass in the direction of the green arrow. Exist sure that the lower mounting tab (scarlet pointer) is properly engaged. And then install the valve into the rubber grommets (xanthous arrows). Make full and bleed the cooling system. Once complete, double check all the hose connections and cheque the engine for coolant leaks.
Figure 8Testing the heater control valve: The heater control valve is normally open (allowing coolant to period to the heater core) and closed when the temp setting is on Common cold. At that place is a pocket-size plunger (dark-green arrow) that seals the valve when the solenoid receives the correct electric signal. This plunger can get restricted, reducing coolant flow. The electrical portion tin besides fail, creating a state of affairs where you have heat all the time.
Effigy 9Testing the heater command valve: The inlet for the heater control valve (dark-green pointer)is in the front end (red arrow). Hot coolant flows from the engine crankcase to the valve. It so flows through the valve out the dorsum to the heater core (xanthous pointer). A quick check would exist to ostend hot coolant is entering the valve at the front hose (reddish arrow) and into the heater core through the rear hose (yellow arrow).
Effigy 10Testing the heater control valve: The following steps will prove yous how to test the electrical indicate to the valve. If yous do non accept coolant menstruation through the valve, and the voltage is correct, replace the valve. Working at the heater control valve, squeeze both release tabs and pull the connector straight off to remove information technology. On my vehicle the brown wire (yellow arrow) is a constant ground and the tan / orange and tan / brown wires are the battery volt controls from the HVAC command caput. To examination the signal to the valve, I will connect a digital volt meter across the terminals and test the voltage. Outset past turning the HVAC temperature control to full hot (green arrows). Then turn the ignition to the RUN position. Then connect your DVOM across the terminals. Your DVOM should virtually read Aught volts (blueish arrow). Adjacent, rotate the HVAC temperature control to full cold, with the ignition in the RUN position. Your DVOM across the terminals should read Bombardment+ volts. These steps show a properly working circuit. If you are missing a voltage signal, bank check that the footing to the valve is skilful. Then check the bombardment volts signal back to the HVAC control caput. When you're done, reassemble the items and confirm that the wiring is routed as it was before.
Got more questions? Ask any of our automotive experts.
0 Response to "Iã¢â‚¬â„¢m Right  Again So I Quit Beautiful"
Post a Comment