Land Rover Discovery: Engine System - General Information Bearing Inspection (G61255) / General
Procedures
GENERAL PROCEDURES
![Engine System - General Information Bearing Inspection (G61255) General Procedures](images/books/227/index470(11).jpg)
Inspect bearings for the following defects.
- Cratering - fatigue failure
- Spot polishing - incorrect seating.
- Imbedded dirt engine oil.
- Scratching - dirty engine oil
- Base exposed - poor lubrication.
- Both edges worn - journal damaged.
- One edge worn - journal tapered or bearing not seated
Engine System - General
Information Camshaft
Bearing Journal
Diameter
(G61234) General
Procedures
GENERAL PROCEDURES
![Engine System - General Information Camshaft Bearing Journal Diameter (G61234) General Procedures](images/books/227/index41(15).jpg)
Determine the diameter of the camshaft journals.
- Using a micrometer measure the diameter at 90 degrees
intervals to determine if the journals are out-of-round.
- Measure at two different points on the journal to determine
if there is any tapering.
- If the measurements are out of the specified range, install a
new camshaft.
Engine System - General
Information Camshaft
End Play (G61236)
General Procedures
NOTE:
Make sure that the camshaft is to specification.
![Engine System - General Information Camshaft End Play (G61236) General Procedures](images/books/227/index42.gif)
Using the special tool, measure the end play.
- Slide the camshaft in both directions. Read and note the
maximum and minimum values on the dial indicator gauge.
End play = maximum value minus minimum value.
- If the measurement is out of specification, install new
components.
Engine System - General
Information Camshaft
Lobe Lift (G61238)
General Procedures
![Engine System - General Information Camshaft Lobe Lift (G61238) General Procedures](images/books/227/index43(13).gif)
Measure the diameter (1) and diameter (2) with a vernier caliper.
The difference in measurements is the lobe lift.
Engine System - General
Information Camshaft
Surface Inspection (G61237)
General Procedures
![Engine System - General Information Camshaft Surface Inspection (G61237) General Procedures](images/books/227/index44.gif)
Inspect camshaft lobes for pitting or damage in the active area.
Minor pitting is acceptable outside the active area.
Engine System - General
Information Connecting
Rod Cleaning (G61251)
General Procedures
CAUTION:
Do not use a caustic cleaning solution or damage to
connecting rods may occur.
![Engine System - General Information Connecting Rod Cleaning (G61251) General Procedures](images/books/227/index45.gif)
Mark and separate the parts and clean with solvent. Clean the oil
passages.
Engine System - General
Information Connecting
Rod Large end Bore (G61252)
General Procedures
![Engine System - General Information Connecting Rod Large end Bore (G61252) General Procedures](images/books/227/index46(13).gif)
Measure the bearing bore in two directions. The difference is the
connecting rod bore out-of-round. Verify the out-of-round is within
specification.
Engine System - General
Information Cylinder
Bore out-of-round (G61243)
General Procedures
GENERAL PROCEDURES
NOTE:
The main bearing caps or lower crankcase must be in place
and tightened to the specified torque; however, the bearing
shells should not be installed.
![Engine System - General Information Cylinder Bore out-of-round (G61243) General Procedures](images/books/227/index47(14).jpg)
Measure the cylinder bore with an internal micrometer.
- Carry out the measurements in different directions and at
different heights to determine if there is any out-ofroundness
or tapering.
- If the measurement is out of the specified range, hone out
the cylinder block or install a new block.
READ NEXT:
GENERAL EQUIPMENT
Compression tester (petrol/diesel)
Land Rover diagnostic equipment
CHECK
CAUTIONS:
Before disconnecting any components, make sure the area is clean
and free from foreign material.
CAUTION:
The compressed air line supply pressure must be between 3.5 and 12
bar (50 and 175 psi) for the smoke test equipment to function
correctly. Do not exceed this pressure. Failure to follow this
General Procedures
GENERAL EQUIPMENT
Pneumatic vacuum gun
CLEANING
WARNINGS:
Do not carry out any repairs to the fuel system with the engine
running. Failure to follow this instruction may result i
SEE MORE:
The Telematics Control Module (TCU) receives the Global System
for Mobile
communications (GSM) and Global Positioning System (GPS) signals. Signal
reception is via roof pod which contains the GPS and GSM antennas.
The GPS signal is received by the antenna and is passed to the GPS signal
splitter.
Measuring options
Comparison measurements can also be made on the outside of the body.
Depending on the damage, comparison measurements and diagonal
measurements can be carried out using compass, telescopic rod, tape
measure or ruler.
NOTE:
The same reference points must be chosen on both side