Cylinder Liner Seats, Reconditioning - Volvo Penta TAD1630G Workshop Manual

Group 21
5
The cylinder liners have a honing pattern where the an-
gles are carefully calculated to give optimal life span. See
illustration.
When honing after a piston ring replacement, the original
honing pattern must be followed to keep the lubrication prop-
erties.
The honing marks must be formed uniformly and cut evenly
in both directions over all the cylinder surface.
Note: The correct speed must be maintained to obtain the
correct pattern.
6
Clean the liner thoroughly after honing. Use warm water,
a brush and detergent (never use thinners, kerosene or die-
sel oil). Dry the liner using paper or a cloth without nap. After
drying, lubricate the liner with light engine oil.
Cylinder liner seats,
reconditioning
Special tools: 999 2479, 999 9942, 999 6966, 998 9876
Note: Due to tight fitting on some engines, it may be impos-
sible to turn the lining in the cylinder block.
Grinding with grinding paste under the liner collar can in such
cases not be done. Checking of the contact pattern with
marking paint cannot be done.
1
Fit the cylinder liner without sealing rings in the cylinder
block and check the height of the sealing face. Make a note
of the dial indicator reading.
The correct height should be 0.06-0.10 mm (0.0024–
0.0039").
Removed material is compensated by adding shims which
are available in various thicknesses. The smallest possible
number of shims should be used. Calculate the thickness of
the shims considering the extent of the damage and the
height of the sealing face above the cylinder block face.
2
Before milling the liner shelf, the surface should be rough-
ened up with emery cloth in order not to blunt the sharpness
of the cutter, particularly if the surface has been ground pre-
viously with grinding paste.
3
Prepare and fit milling tool 999 6942. Make sure that the
tool collar runs free of the intermediate web of the block.
Service procedures - engine
41