If your valve clearance keeps changing as if by magic, you’ve just found the reason! These rocker arm nuts are used in “sewing machine engines” ranging from the 1.1L in the Kadett B to the 1.2L in the Kadett C or Manta A, and they are highly self-locking. The parts fit all OHV engines and are new, genuine Opel replacement parts—so the quality is top-notch!
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