EM-116
< UNIT DISASSEMBLY AND ASSEMBLY >
[VQ40DE]
ENGINE UNIT
Factory installed parts grading:
• Only grade “0”.
Unit: mm (in)
*: After installing in connecting rod
CYLINDER BLOCK DISTORTION
• Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder block surface.
CAUTION:
Do not allow any debris to enter engine oil or engine coolant passages.
• Measure the distortion on the cylinder block upper face at some
different points in six directions with straightedge and feeler gauge.
• If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
• Install lower cylinder block without installing main bearings, and
tighten lower cylinder block bolts to the specified torque. Refer to
EM-103, "Disassembly and Assembly"
for the tightening proce-
dure.
• Measure the inner diameter of main bearing housing with bore
gauge.
• If out of the standard, replace cylinder block and lower cylinder
block as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with lower cylinder block.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
• Using bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. [(X) and (Y) direc-
tions at (A), (B) and (C)] [(X) is in longitudinal direction of engine].
Grade 0 1
Connecting rod bushing
inner diameter *
22.000 - 22.006
(0.8661 - 0.8664)
22.006 - 22.012
(0.8664 - 0.8666)
Piston pin hole diameter
21.993 - 21.999
(0.8659 - 0.8661)
21.999 - 22. 005
(0.8661 - 0.8663)
Piston pin outer diameter
21.989 - 21.995
(0.8657- 0.8659)
21.995 - 22.001
(0.8659 - 0.8662)
PBIC2950E
Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 74.993 - 75.017 mm (2.9525 - 2.9534 in)
PBIC2012E
Standard inner diameter:
95.500 - 95.530 mm (3.7598 - 3.7610 in)
Out-of-round [Difference between (X) and (Y)]:
0.015 mm (0.0006 in)
Taper limit [Difference between (A) and (C)]:
0.01 mm (0.0004 in)
PBIC2955E
Revision: January 2013 2013 Xterra
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