1989-Montero · engine 2'6 · страница 53 из 55 · Открыть оригинал PDF ↗
SERVICE POINTS OF DISASSEMBLY
6. REMOVAL OF OIL PRESSURE SWITCH
(1) Remove the terminal of oil pressure switch.
(2) Using the special tool, remove the oil pressure switch.
Caution
Sealant is coated on the threaded part, so be careful
not to damage when removing.
Проверка
NWYHAll
. CYLINDER BLOCK
(1) Visually check the cylinder block for scores, rust and
corrosion. Also check for cracks or any other defects
by using a flaw detecting agent (magnafluxing). Cor-
rect or replace the block if defective.
(2) Measure the cylinder bore with a cylinder gauge at
three levels in the directions of A and B.
(3) If the cylinder bores show more than specified out-of-
round or taper, or if the cylinder walls are badly
scuffed or scored, the cylinder block should be
rebored and honed, and new oversize pistons and
rings fitted.
Measuring points are as shown.
Standard value
Cylinder bore: 91.1 mm (3.567 in.)
Out-of-roundness and taper of cylinder bore:
Less than 0.02 mm (.OOOS in.)
(4) If cylinder top ridge is worn in stages, cut away with
ridge reamer.
(5) Oversize pistons are available in four sizes.
Piston service size and mark
0.25 mm (.OlO in.) O.S.: 0.25
0.50 mm (.020 in.) O.S.: 0.50
0.75 mm (.030 in.) O.S.: 0.75
1.00 mm (.039 in.) O.S.: 1.00
(6) To rebore the cylinder bore to oversize, keep the
specified clearance between the oversize piston and
the bore, and make sure that all pistons used are of
the same oversize. The standard measurement of the
piston outside diameter is taken at a level 2 mm (.08
in.) above the bottom of the piston skirt and across the
thrust faces.
Standard value
Piston-to-cylinder wall clearance: 0.02-0.04 mm
(.0006-.OOlS
in.)
(7) Check for damage and cracks.
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