Factory Part. Thermostat - Genuine BMW This is the same factory thermostat that would be installed at the BMW dealership. Fits all BMW E46 vehicles. Thermostat - Rein In German, 'rein' means 'pure'. And in the automotive industry, the Rein Automotive name has quickly come to stand for quality and reliability. Rein makes ultra high quality aftermarket parts for all BMWs. This is the same Genuine BMW coolant you would buy from the dealership.
Coolant hose - Gates Gates proudly supplies automotive parts to more than 34 OE manufacturers worldwide, and we bring that same quality, reliability, and performance to our OE-equivalent aftermarket parts. Our complete aftermarket solutions feature first-to-market and late model coverage on systems such as accessory drives, engine timing, cooling and more.
Gates parts are designed specifically for OE quality and performance requirements of your vehicle. All BMW E46 vehicles. Coolant hose - Rein Coolant hose - Genuine BMW This is the same factory radiator hose that would be installed at the BMW dealership. Fits all BMW E46 models.
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Click here to login to your account. Your dash-mounted temperature gauge will notify you of this malfunction. Cooling system repairs.
All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown. How do mechanics replace the engine cooling system thermostat? Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement. All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
The thermostat housing bolts are tightened to original equipment manufacturer OEM specifications using a calibrated inch-pound torque wrench. The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air. The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun.
This will confirm the thermostat is open. Finally, the engine is checked for leaks. Is it safe to drive with an engine cooling system thermostat problem? When replacing the engine cooling system thermostat keep in mind: Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown. One of the hose clamps can be reached from the button of the car with a long screwdriver, the other one can be reached from the top.
The thermostat in E90 is bolted on to the electric water pump. On Xi models the design of the subframe makes it hard to reach the bolts but it is definitely doable without removing anything extra.
If you are having a really hard time getting to the bolts you can remove the sway bar for more clearance. New thermostats are made of plastic for whatever reason but so far we haven't seen any come back for warranty. Put everything back together in the reverse order. A proper coolant bleeding procedure must be followed to get any trapped air out of the cooling system prior to starting the car.
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