Volvo 2001 User Manual

Replacing the valve seat exhaust port 2003T
Grind down the valve disc of a discarded valve to just below
27 mm (1 .063
in)
diameter
. Push the valve stem through the
guide . NOTE!Do not push in too far- the valve disc should be
just below the edge of the seat . Spot
weld the disc in place at
three points using a electric welder . Knockout the seat by
hitting the valve guide
with a plastic-headed hammer .
Cool the
new
seat
to approx . -20°C (-4°F) ; the cylinder
head should beat room temperature (+ 20°0168°F)
.
Place the
cooled seat on tool
884961-4 and knock it down until it
bottoms. NOTE! Turn the seat with the valve face
towards
the
tool
.
Valve springs
5 . Checkthe free length of
the valve springs and the length
when loaded .
L = Length, unloaded
42,5 mm (1 .67323 in .)
L 1 = Length, loaded with 170±10N (17±1 kp) 32
mm
(1 .25984
in .)
L 2 = Length, loaded with 300±20 N (30±3 kp) 24
mm
(0 .94488 in .)
Rocker arm mechanism
6 .
Disassemble the rocker armmechanism and clean the
parts . Check the wear of the shaft and rockerarm bush i ngs .
Should the bushings need to be replaced, usethe mandrel
p/n
9991867 for the removal and installation, (make
sure
that the oil hole in the bushing coincides with the one in the
rocker arm) .
After the
installation the bushings
are reamed
to a close running fit . When installing the rockerarm shaft,
it must beturned so that the lubrication holes are facing the
valve-side
. Check to make sure that the rocker arm contact
surface againstthe valve is concave . Minor adjustments are
made in
a
valve grinding
machine . Oil the shaft and install
the parts .
Pressure testing the nozzles
7 . Check the nozzle's spray pattern at the correct opening
pressure (see Technical Data) .
Check also that the fuel sprays
stop
simultaneously and no dripping occurs .
Adjust the opening-pressure
with adjustment-washers (1)
being available
in different thicknesses from 1 mm U3937
in .) to 1,95 mm ( .076772 in .) in steps
of 0,05 mm ( .001969
in .) . Disassemble
the injector and replace the adjustment-washer
againstathinneroneorathickeronedependingon
whether
the pressure must be reduced or increased .
Assemble
the injector and check the opening-pressure and
the spray-pattern .

Volvo 2001 Specifications

General

Brand	Volvo
Model	2001
Category	Engine
Language	English