Discovery II
ENGINE - V8
12-2-72 OVERHAUL
Bearings - connecting rods
$% 12.17.16.01
Disassembly
1. Remove oil pick up strainer.
ENGINE - V8, OVERHAUL, Strainer
2. Suitably mark cylinder reference number on
each connecting rod bearing cap.
3. Remove 2 bolts securing each connecting rod
bearing cap, remove caps and recover
connecting rod bearings.
CAUTION: Keep bearing caps, bearings and
bolts in their fitted order.
4. Push each connecting rod up cylinder bore
until connecting rods are clear of crankshaft
journals.
CAUTION: Ensure that connecting rods do
not contact cylinder bores.
5. Remove bearing shells from each connecting
rod.
Inspect
1. Clean crankshaft journals and bearing
locations in connecting rods.
2. Inspect connecting rod bearings for wear and
renew if necessary. Connecting rod bearings
are available in two oversizes.
l
Connecting rod bearing 1st oversize = 0.254
mm (0.01 in).
l
Connecting rod bearing 2nd oversize =
0.508 mm (0.02 in).
3. Check crankshaft big-end journals for wear and
scoring. Measure for ovality; taking 3
measurements at 120
°
intervals at each end
and at centre of journals.
l
Standard journal = 55.500 to 55.513 mm
(2.20 to 2.22 in).
l
1st undersize journal - 0.254 mm (0.01 in) =
55.246 to 55.259 mm (2.17 to 2.18 in).
l
2nd undersize journal - 0.508 mm (0.02 in)
= 54.992 to 55.005 mm (2.16 to 2.165 in).
l
Journal - max. ovality = 0.040 mm (0.002 in)
Reassembly
1. Clean connecting rod caps.
2. Lubricate connecting rod journals and bearing
shells with clean engine oil.
3. Fit bearing shells to connecting rods and caps.
4. Rotate crankshaft until connecting rod journals
are correctly positioned.
5. Taking care not to displace bearing shells, pull
connecting rods on to crankshaft journals.
6. Check that bearing shells are correctly located
in connecting rod bearing caps.
7. Fit connecting rod bearing caps, ensuring that
they are in their correct fitted order.
NOTE: The rib on the edge of the bearing cap
must face towards the front of engine on the RH
bank of cylinders and towards the rear on the
LH bank.
8. Lightly oil threads of connecting rod bolts. Fit
connecting rod bolts and tighten to 20 Nm (15
lbf.ft) then turn a further 80
°
.