01-30
Basic Enqine
01-30
DISASSEMBLY AND ASSEMBLY (Continued)
The crankshaft main bearing journals of standard diameter
came in two size categories and are either unmarked or
have a yellow paint mark on the first counterweight. See
specifications for dimensions.
JOURNAL MARI
<ING
The standard diameter connecting rod journals are
unmarked. Where the connecting rod journals are 0.25 mm
(.OlO inch) undersize, the crankshaft is marked with a
green paint spot on the web next to the connecting rod
bearing journal number one, as shown.
CONNECTING
ROD JOURNAL
MARKING
The standard main bearing and connecting rod bearing
inserts have no color marking. Bearing inserts for
undersize (u/s) crankshafts or oversize (o/s) cylinder
blocks have corresponding inscriptions on the back.
When new bearing inserts are selected they should be
measured to ensure that they are the appropriate size.
Be sure that the specified tolerances are adhered to by
measuring bearing journals and block bores individually
with the bearing inserts installed.
1. Mount the block in the stand inverted.
2.
Install the coolant drain plug and oil pressure sending
unit.
3.
Place the upper main bearing inserts in position in the
bore with the tang fitting in the slot provided.
4.
Install the lower main bearing inserts in the bearing
caps.
5.
Carefully lower the crankshaft into place.
Be careful
not to damage the bearing surfaces.
Check the
clearance of each main bearing following the
procedures in the Overhaul Section.
6. Install the thrust washers to the center main. Apply
alight coat of oil to the journals and bearings. Install
the main bearing caps. Tighten the main bearing cap
bolts evenly to-specifications and check crankshaft
rotation.
7. Check the crankshaft end play.
8.
Install the tappets into their respective bores.
9.
Oil the camshaft journals with heavy engine oil and
apply Lubriplate or equivalent to all lobes and then
carefully slide it through the bearings.
10.
Position the camshaft thrust plate and tighten the
attaching bolts to specifications. Check the camshaft
end play. Bend the locking tabs to secure the bolts.
11.
Install the camshaft sprocket and timing chain aligning
the timing marks on the camshaft and crankshaft
sprockets. Tighten the attaching bolts to specification
and bend up the locking plate tabs.
12.
Position the timing chain tensioner arm on the pivot
pin and install the tensioner.
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