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thread specifications for oil cooler lines at filter

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    thread specifications for oil cooler lines at filter

    I have a leak at the LF corner of the car and suspect it's either the oil cooler or the lines.
    I want to put a fitting and a cap on the oil cooler lines where I remove them from the filter and pressurize. Anyone know the thread specs?
    1989 325is.
    It may also be a leak in the auto trans cooler lines but because of a leaky rack and the fact that it's February in Michigan, the source of the leak is a bit hard to determine.
    There is a telltale oil smudge on the valence just below the LF of the radiator and a 6" puddle on my driveway.

    #2
    Filter housing is M22 x 1.5

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