Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 126
Published: 11-May-2011
Engine System - General Information - Crankshaft Main Bearing Journal Clearance
General Procedures
1. The main bearing
machine codes
are displayed on
the crankshaft
(1) and the
cylinder block (2)
2. NOTE: Main
bearing number 1
relates to the front
of the engine.
Read the
identification
numbers from the
crankshaft (1).
The first two
numbers
represent
the code for
main bearing
number 1.
The second
pair of
numbers
represents
the code for
main bearing
number 2.
The third
pair of
numbers
represents
the code for
main bearing
number 3.
The last pair
of numbers
represents
the code for
main bearing
number 4.
3. NOTE: Main
bearing number 1
relates to the front
of the engine.
Read the
identification
numbers on the
cylinder block (2).
The first two
numbers
represent
the code for
main bearing
number 1.
The second
pair of
numbers
represents
the code for
main bearing
number 2.
The third
pair of
numbers
represents
the code for
main bearing
number 3.
The last pair
of numbers
represents
the code for
main bearing
number 4.
4. Using the select fit chart, for each main bearing match the crankshaft
code (1) and the block code (2) with it's corresponding column or row.
By reading across the crankshaft code row (1) and down the block code
column (2) select the correct grade bearing for each main.
1 Crankshaft code.
2 Block code.
5. E.g. if the crankshaft code is *8580*8082* and the Block code is
*0609*0711*, main bearing 1 should be assembled with a grade 1
bearing, as determined by the intersection of the number 06 block
column (2) and the number 85 crankshaft row (1).
Main bearing 2, 3 and 4 would all be assemble with a grade 2.
Published: 11-May-2011
Engine System - General Information - Crankshaft Main Bearing Journal Diameter
General Procedures
General Equipment
Micrometer
1. Measure the diameter of the main bearing journals and the big-end
bearing journals.
Repeat the measurement with the
micrometer
offset by 90°, in
order to determine any eccentricity which may be present.
Measure the journal at two different positions to determine any
conicity which may be present.
Published: 11-May-2011
Engine System - General Information - Cylinder Block Distortion
General Procedures
1. Using a Straight Edge and a Feeler Gauge, measure the cylinder
block/cylinder head distortion.
Measure the mating face distortion.
If the value is not to specification rework the mating face (if
permitted).
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