|
1.Remove oil from the
crankshaft journal and crankshaft bearing.
|
|
2.Install the
crankshaft.
|
![](../../../img/11/AK300203AE00ENG.png)
|
3.Cut the plastigage to the
same length as the width of bearing and place it on journal
in parallel with its axis. 4.Install the
crankshaft bearing cap carefully and tighten the bolts to
the specified
torque. 5.Carefully remove the crankshaft bearing
cap.
|
![](../../../img/11/AK300204AE00ENG.png)
|
6.Measure the width of the
plastigage at its widest part by using a scale printed on
the
plastigage package. Standard
value:
No.1,2,4,5 journal: 0.02 -
0.03 mm No.3 journal: 0.03 - 0.04
mm
Limit: 0.1 mm
|
![](../../../img/11/AK403250AA00ENG.png)
|
1.Visually check for
scratches, rust, and corrosion. Use also a flaw
detecting agent for the check. If defects are evident,
correct or replace. 2.Using a straightedge and
feeler gauge, check the block top surface for warpage. Make
sure that the surface is free from gasket chips and other
foreign matter. Standard value: 0.05
mm Limit: 0.1 mm 3.If the distortion is
excessive, correct within the allowable limit or
replace. Grinding limit: 0.2 mm
*Includes/combined with cylinder head
grinding Cylinder block height (when new): 290
mm 4.Check cylinder walls for scratches
and seizure. If defects are evident, replace or
bore to oversize and replace pistons and piston
rings.
|
![](../../../img/11/AK300206AD00ENG.png)
|
5.Using a cylinder gauge,
measure the cylinder bore and cylindrically. If worn badly,
correct
the cylinder to an oversize and replace the piston and
piston rings. Measure at the points shown
in the illustration. Standard
value:
Cylinder inner diameter 87.0
mm Cylindrically 0.01 mm or
less
|
![](../../../img/11/AK300577AD00ENG.png)
|
1.Oversize pistons to be
used should be determined on the basis of the largest bore
cylinder.
Piston size identification
Size
|
Identification
mark
|
0.50 mm
oversize diameter
|
50
|
note |
Size mark is stamped on the
piston top.
|
2.Measure the outside diameter (OD) of the
piston to be used. Measure it in thrust direction
as shown. 3.Based on the measured piston OD,
calculate the boring finish dimension. Boring
finish dimension = Piston OD + (clearance
between piston OD and cylinder) -0.02 mm (honing
margin) 4.
caution |
To prevent distortion that may
result from temperature
rise during honing, bore cylinders, working from
number 2 to number 4 to number 1 to number
3.
|
Bore all cylinders to the calculated boring finish
dimension. 5.Hone to the final finish dimension
(piston OD + clearance between piston
OD and cylinder). 6.Check the clearance between
the piston and cylinder. Clearance between
piston and cylinder: 0.02 - 0.04
mm
note |
When boring cylinders, finish
all of four cylinders to the same oversize. Do
not bore
only one cylinder to an oversize.
|
|