V8 Engine Overhaul: Remove Oil Pressure By-Pass Valve | 35 39 42 Engines
ENGINE
28
OVERHAUL
OIL PUMP - ENGINE NUMBERS WITH SUFFIX B
CAUTION: Overhaul procedures for the oil
pump, oil pressure by-pass valve and oil
pressure relief valve are limited to carrying
out dimensional checks. In the event of wear or
damage being found, a replacement timing cover
assembly must be fitted.
Oil pump - remove
1. Remove timing cover.
2. Remove oil pump drive gear.
3. Remove screws and bolt - if fitted securing
cover plate, remove plate.
4. Make suitable alignment marks on inner and
outer rotors, remove rotors.
Oil pressure by-pass valve - remove
1. Remove circlip.
2. Remove by-pass valve plug.
3. Remove and discard ’O’ ring from plug.
4. Remove by-pass valve spring and plunger.
5. Check plunger and bore of by-pass valve in oil
pump body for scoring and corrosion.
NOTE: Light corrosion may be removed
using grade 600 emery cloth soaked in oil.
