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    Thermostat - 88 Degree - E24, E28, E30, E32, E34, E36, E39, Z3

    Part #: 11537511580 (11-53-7-511-580)
    Brand :

    The thermostat regulates the temperature of your coolant. At a predetermined temperature the thermostat will open to let coolant flow to the radiator and be cooled by airflow or the fan. Over time the thermostat will become stuck open or closed, leading to a variety of issues. A closed thermostat will never allow the coolant to reach the radiator and be cooled. Hot coolant will continue to circulate through the engine and absorb even more heat until boiling and the system overheats. An open thermostat is not as bad but is still not ideal - the coolant is always cool, with the temp needle always reading in the cool range. This tells the ECU to richen the fuel mixture to bring the car up to normal operating temp. So your fuel mileage decreases and the car runs rich.

    Replacing the thermostat is an easy but messy job. This thermostat includes the main o-ring (but a housing gasket may be required). Consider replacing the housing and any associated temp sensors while you're in there. The cooling system will need to be bled after.

    Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 88* thermostat, towards the top of the range. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.

    This thermostat fits the following BMWs:
    1977-1983 E21 BMW 323i
    1986-1991 E30 BMW 318is 318ic 325e 325es 325i 325ic 325is 325ix
    1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
    1982-1988 E28 BMW 528e
    1986-1988 E28 BMW 535i
    1989-1995 E34 BMW 525i 535i
    1997-1998 E39 BMW 528i
    1986-1989 E24 BMW 635csi
    1988-1994 E32 BMW 735i 735il
    1997-2000 Z3 BMW Z3 2.8 M Roadster M Coupe

    Shipping Dimensions: 6 x 6 x 6
    Shipping Weight: 1.00

    BMW List Price: $43.47 (USD)
    Price: $27.95 (USD) 

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