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36.12 Apply sealant to the rear main
bearing cap areas shown darkened
36 Crankshaft and main
bearings - refitting
1 Wipe the bearing shell locations in the
crankcase with a soft, non-fluffy rag.
2 Wipe the crankshaft journals with a soft,
non-fluffy rag.
3 Fit the five upper half main bearing shells to
their locations in the crankcase. If the old
shells are being re-used, make sure they are
refitted to their old locations.
4 Identify each main bearing cap and place in
order. The number is cast onto the cap and on
intermediate caps an arrow is also marked
which should point towards front of engine.
5 Wipe the cap bearing shell location with a
soft non-fluffy rag.
6 Fit the bearing half shell onto each main
bearing cap.
7 Apply a little grease to each side of the
centre main bearing so as to retain the
thrustwasher.
8 Fit the upper halves of the thrustwashers
into their grooves either side of the main
bearing. The slots must face outwards.
9 Lubricate the crankshaft journals and the
upper and lower main bearing shells with
engine oil and locate the rear oil seal (with lip
lubricated) on the rear of the crankshaft.
10 Carefully lower the crankshaft into the
crankcase.
11 Lubricate the crankshaft main bearing
journals again and then fit No 1 bearing cap. Fit
the two securing bolts but do not tighten yet.
37.2 Big-end bearing shell lugs (arrowed)
are adjacent
36.14 Fitting a thrust washer to the centre
main bearing cap
12 Make sure that the mating faces are clean,
then apply sealant (Loctite 518 or equivalent)
to the areas on the rear main bearing cap (see
illustration).
13 Fit the rear main bearing cap. Fit the two
securing bolts, but as before do not tighten yet.
14 Apply a little grease to either side of the
centre main bearing cap so as to retain the
thrustwashers. Fit the thrustwashers with the
tag located in the groove and the slots facing
outwards (see illustration).
15 Fit the centre main bearing cap and the
two securing bolts, then refit the intermediate
main bearing caps. Make sure that the arrows
point towards the front of the engine.
16 Lightly tighten all main cap securing bolts
and then fully tighten in a progressive manner
to the specified torque wrench setting.
17 Check that the crankshaft rotates freely.
Some stiffness is to be expected with new
components, but there must be no tight spots
or binding.
18 Check that the crankshaft endfloat is
within the specified limits by inserting a feeler
blade between the centre crankshaft web and
the thrustwashers.
19 Make sure that the rear oil seal is fully
located onto its seating. Coat the rear main
bearing cap wedges with sealing compound,
then press them into position with the rounded
red face towards the cap (see illustration).
20 Refit the oil pump and strainer.
21 Refit the crankshaft front oil seal housing,
and auxiliary shaft front cover, if applicable,
together with a new gasket and tighten the bolts.
37.4a Fitting a piston ring compressor
SOHC engines 2A•15
36.19 Fitting a sealing wedge to the rear
main bearing cap
Make sure that the bottom face of the housing is
aligned with the bottom face of the block.
22 Refit the flywheel or driveplate and the
pistons and connecting rods.
23 Refit the timing belt and sprockets.
37 Pistons and connecting rods
- refitting
1 Clean the backs of the bearing shells and
the recesses in the connecting rods and big-
end caps.
2 Press the bearing shells into the connecting
rods and caps in their correct positions and oil
them liberally. Note that the lugs must be
adjacent to each other (see illustration).
3 Lubricate the cylinder bores with engine oil.
4 Fit a ring compressor to No 1 piston, then
insert the piston and connecting rod into No 1
cylinder. With No 1 crankpin at its lowest
point, drive the piston carefully into the
cylinder with the wooden handle of a hammer,
and at the same time guide the connecting rod
onto the crankpin. Make sure that the arrow on
the piston crown is facing the front of the
engine (see illustrations).
5 Oil the crankpin, then fit the big-end bearing
cap in its previously noted position. Oil the
big-end bearing cap nuts, fit the nuts and
tighten them to the specified torque.
6 Check that the crankshaft turns freely.
7 Repeat the procedure given in paragraphs 4
to 6 inclusive on the remaining pistons.
8 Refit the cylinder head and sump.
37.4b Piston crown markings
Arrow points to front of engine
2A
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