8.6.1 Flatness check
Put the cylinder head on a surface plate and, with a dial gauge,
check the flatness of surface C .
The MAX value of allowable irregularity of surface C is 0.10mm.
If the value is not observed, you are required to grind surface C .
The MAX removal allowed is 0.20 mm.
Important
ï‚·
Grinding is to be performed with sleeves A of the
electronic injectors assembled.
ï‚·
Grinding is prohibited on all engines provided with an
EPA name plate (refer to Par. 1.3 ).
8.6.2 Valve seats check
Measure indentation
B
of each valve with regard to the cylinder
head surface
C
, which is to be a
MIN
of 0.60 mm and
MAX
of
0.85 mm.
The
B MAX
indentation allowed on worn components is 1.10
mm.
If the measured value does not correspond with the values
indicated, replace the worn component.
Important
ï‚·
The seats must be worked after driving to reach value B ,
go to a rectification workshop for such operations.
8.6.3 Valve springs
Using a dynamometer, subject the spring to two different forces
(in Tab. 8.9) and check that the length of the spring corresponds
to the values indicated in the table.
(*1)
The code
ED0057551850-S
is installed from
S/N 4418801760
Tab 8.9