Engine Overhaul Manual: Inspection of Oil Pressure Relief Valve
ENGINE
OVERHAUL
27
Oil pressure by-pass valve - inspection
1. Clean by-pass valve components and plunger
bore in timing cover.
2. Check plunger and bore for scoring and that
plunger slides freely in bore with no perceptible
side movement.
3. Check by-pass valve spring for damage and
distortion; check spring free length:
Spring free length = 60.0 mm (2.4 in).
Oil pressure relief valve - if fitted - inspection
1. Clean relief valve components and piston bore
in timing cover.
2. Check piston and bore for scoring and that
piston slides freely in bore with no perceptible
side movement.
3. Check relief valve spring for damage and
distortion; check spring free length:
Spring free length = 60.0 mm (2.4 in).