3.0 Wheel Hub Covers
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Covers may be affixed to the alloy rim by using Loctite 638 (former BMW Part No. 07 58 9 056 030). Covers may only be used once.
Loctite 638 - (Loctite Part No. 21447)
Wurth Part No. 8936010
The cooling-turbine wheel covers of the M5 (E34) produced from March 1990 to October 1990 may be secured to the wheel by applying Loctite 242 to the attaching screw threads. First clean screw threads with Loctite Cleaning Solvent 755.
See S.I. Bulletin B 36 03 90 (3182).