EM-108
< UNIT DISASSEMBLY AND ASSEMBLY >
[VQ40DE]
ENGINE UNIT
b. Install thrust bearings to the both sides of the No. 3 journal hous-
ing on cylinder block.
• Install thrust bearings with the oil groove facing crankshaft arm
(outside).
• Install thrust bearing with a projection on one end on cylinder
block. Align projection with mating notch.
c. Install main bearings paying attention to the direction.
• Main bearing with oil hole and groove goes on cylinder block.
The one without them goes on lower cylinder block.
• Before installing main bearings, apply engine oil to the bearing
surface (inside). Do not apply engine oil to the back surface,
but thoroughly clean it.
• When installing, align main bearing stopper protrusion to cut-
out of cylinder block and lower cylinder block.
• Ensure the oil holes on cylinder block and those on the corre-
sponding bearing are aligned.
5. Install crankshaft to cylinder block.
• While turning crankshaft by hand, check that it turns smoothly.
6. Inspect the outer diameter of lower cylinder block bolt. Refer to EM-112, "Inspection After Disassembly"
.
7. Install lower cylinder block as follows:
NOTE:
Lower cylinder block cannot be replaced as a single part, because it is machined together with cylinder
block.
a. Apply a continuous bead of liquid gasket using Tool to lower cyl-
inder block as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-17, "Recommended Chemical Products and Sealants"
.
CAUTION:
After liquid gasket is applied, rear oil seal installation must
be finished within 5 minutes. Therefore, the following pro-
cedure must be performed quickly.
b. Tighten lower cylinder block as follows:
i. Apply new engine oil to threads and seat surfaces of the bolts.
ii. Tighten M8 bolts in numerical order as shown from No. 17 to 24.
CAUTION:
Wipe off completely any protruding liquid gasket on rear oil
seal installation surface.
NOTE:
There are more processes to complete the tightening bolts.
However stop procedure here to install rear oil seal.
c. Install rear oil seal. Refer to EM-86, "Removal and Installation of Rear Oil Seal"
.
d. Restart tightening of lower cylinder block bolts as follows:
PBIC2968E
PBIC2969E
Tool number : WS39930000 ( — )
Bolts 17 - 24 : 22.1 N·m (2.3 kg-m, 16 ft-lb)
PBIC2942E
PBIC2941E
Revision: January 2013 2013 Xterra
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