1999 LAND ROVER DISCOVERY ECU

ENGINE - V8
OVERHAUL 12-2-49
Seal - crankshaft - rear - automatic
models
$% 12.21.20.01
Disassembly
1.Remove CKP sensor.

+ ENGINE MANAGEMENT SYSTEM -
V8, REPAIRS, Sensor - crankshaft position
(CKP).
Note: Later engines are fitted with a modified
starter ring gear which incorporates the reluctor
plate, spacer and hub. The modified ring gear
may be fitted as a replacement to early
engines.
2. Early engines: Remove 4 bolts securing drive
plate clamp ring and remove ring.
3. Early engines: Remove drive plate from hub.
4. Early engines: Remove 6 Allen bolts securing
hub and starter ring gear, remove hub, starter
ring gear and collect spacer.
Note: On early engines, balance weights are on
engine side of drive plate, replacement drive
plates will have balance weights on torque
converter side of drive plate.5. Later engines: Remove 4 bolts securing drive
plate clamp ring and remove ring.
6. Later engines: Remove drive plate.
7. Later engines: Remove 6 Allen bolts securing
starter ring gear to crankshaft, remove starter
ring gear.
8.Carefully remove oil seal from cylinder block to
avoid damage to seal location or running
surface on crankshaft.

ENGINE - V8
12-2-50 OVERHAUL
Reassembly
1.Ensure both seal location and running surface
on crankshaft are clean. Ensure that bolt holes
in crankshaft are clean and dry.
2.Lubricate replacement oil seal with engine oil.
3.Lubricate seal guide LRT-12-095 with engine
oil and position guide to crankshaft.
4.Fit new seal squarely onto crankshaft and
remove guide LRT-12-095.
5.Fit seal into location using tools LRT-12-091
and LRT-99-003.
6. All engines: Ensure bolt holes in crankshaft
are clean and dry.
7. All engines: Clean all components.
8. All engines: Check that drive plate is free from
cracks and distortion.
9. Early engines: Fit hub, starter ring gear and
spacer to crankshaft, tighten Allen bolts to 78
Nm (58 lbf.ft).
10. Early engines: Fit drive plate and clamp ring,
tighten bolts to 45 Nm (35 lbf.ft).
11. Later engines: Fit starter ring gear, fit Allen
bolts and tighten to 85 Nm (63 lbf.ft).
12. Later engines: Fit drive plate and clamp ring,
fit bolts and tighten to 45 Nm (33 lbf.ft).
13.Fit CKP sensor.

+ ENGINE MANAGEMENT SYSTEM -
V8, REPAIRS, Sensor - crankshaft position
(CKP).
Seal - crankshaft - rear - manual models
$% 12.21.20.01
Disassembly
1.Restrain flywheel.
2.Working in sequence, loosen and remove 6
bolts securing clutch cover to flywheel.
3.Remove clutch cover.
4.Remove clutch plate.
5.Remove CKP sensor.

+ ENGINE MANAGEMENT SYSTEM -
V8, REPAIRS, Sensor - crankshaft position
(CKP).
6.Remove 6 bolts securing flywheel.
7.Remove flywheel.

ENGINE - V8
12-2-52 OVERHAUL
Bearing - spigot - crankshaft
$% 12.21.45.01
Disassembly
1.Remove 6 bolts securing clutch cover.
2.Remove clutch cover.
3.Tap a thread in spigot bush to accommodate a
suitable impulse extractor.
4.Fit extractor to bush.
5.Remove bush from crankshaft. Reassembly
1.Clean bush register in rear of crankshaft.
2.Using a suitable drift, fit new bush to crankshaft
so that it is flush with or up to a maximum of 1.6
mm (0.06 in) below the end of the crankshaft.
3.Ream spigot bush to 19.117 + 0.025 − 0.00 mm
(0.75 + 0.001 − 0.00 in) .
4.Remove all traces of swarf on completion.
5.Clean mating faces of flywheel and crankshaft,
dowel and dowel hole.
6.Fit clutch cover to flywheel and tighten bolts by
diagonal slection to 40 Nm (30 lbf.ft).

ENGINE - V8
OVERHAUL 12-2-53
Gasket - engine sump
$% 12.60.38.01
Disassembly
1.Remove 3 nuts and 14 bolts securing sump to
cylinder block.
2.Remove sump.
3.Remove and discard gasket.
Reassembly
1.Clean all traces of sealant from the sump and
sump mating faces, using a solvent cleaner or
plastic scraper.
2.Ensure that bolt holes in cylinder block are
clean and dry.
3.Apply a 5 mm (0.2 in) wide bead of sealant, Part
No. STC 50550 across the cylinder block to
front cover joint and across the cylinder block to
rear main bearing joint. Apply a globule of
sealant to cover the ends of the cruciform
seals, (see illustration above).
4.Fit new sump gasket, dry, ensure location tags
are correctly positioned.
5.Fit the sump to the cylinder block.6. Noting that the two parts of the tool are
handed, fit tool LRT- 12-183 to the engine
back plate using bell housing nuts and bolts.
7.Secure the tool to the sump using the bolts
which are part of the tool. The holes in the tool
are larger than the diameter of the bolts,
allowing the tool and the sump to move as
the sump bolts are tightened.
8.Fit the sump nuts and bolts, and working in the
sequence shown, tighten to 22 Nm (16 lbf.ft).
9.Remove tool LRT-12-183.
M12 5741
M12 5713
14106248
12
16
17
15
117315913

ENGINE - V8
12-2-54 OVERHAUL
Strainer - oil pick-up
$% 12.60.20.01
Disassembly
1.Remove sump gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
engine sump.
2.Remove 2 bolts and 1 nut securing oil pick up
strainer.
3.Remove oil pick up strainer.
4.Collect spacer.
5.Remove and discard 'O' ring. Reassembly
1.Clean oil pick up strainer and 'O' ring recess.
2.Lubricate new 'O' ring with clean engine oil and
fit to recess.
3.Locate spacer on stud.
4.Position oil pick up strainer, fit bolts and tighten
to 10 Nm (7 lbf.ft). Fit nut and tighten to 22 Nm
(16 lbf.ft).
5.Fit new sump gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
engine sump.

ENGINE - V8
OVERHAUL 12-2-55
Seal - timing gear cover
$% 12.65.05.01
Disassembly
1.Secure tool LRT-12-080 to crankshaft pulley
with 2 bolts.
2.Remove crankshaft pulley bolt.
3.Remove crankshaft pulley.
4.Using tool LRT-12-088, remove oil seal from
timing gear cover and discard. Reassembly
1.Clean seal register in timing gear cover and
crankshaft pulley.
2.Ensure that bolt holes are clean and dry.
3.Apply smear of Retinax LX grease to seal
running surface on crankshaft.
CAUTION: Replacement oil seal is pre-
greased, do not apply additional lubricant.
4. Fit seal to timing gear cover using tool LRT-12-
089 .
5.Secure tool LRT-12-080 to crankshaft pulley
with 2 bolts. Fit crankshaft pulley.
6.Fit crankshaft pulley bolt and tighten to 270 Nm
(200 lbf.ft).
7.Remove tool LRT-12-080 from crankshaft
pulley.

ENGINE - V8
12-2-56 OVERHAUL
Gasket - timing gear cover
$% 12.65.04.01
Disassembly
1.Remove oil pick up strainer.

+ ENGINE - V8, OVERHAUL, Strainer
- oil pick-up.
2.Remove and discard 3 bolts securing coolant
pump pulley.
3.Remove coolant pump pulley.
4.Secure tool LRT-12-080 to crankshaft pulley
with 2 bolts.
5.Remove crankshaft pulley bolt.
6.Remove crankshaft pulley. 7.Remove oil filter and discard.
8.Noting the positions of the longer bolts, remove
9 bolts securing timing gear cover.
9.Remove timing gear cover.
10.Remove and discard timing gear cover gasket.
11.Remove seal from timing gear cover and
discard.

ENGINE - V8
OVERHAUL 12-2-59
Reassembly
1.Clean timing chain and gears and gear
locations.
2.Fit key to crankshaft.
3.Temporarily fit gears to camshaft and
crankshaft. If necessary, rotate shafts to align
timing marks. When aligned correctly, the
timing marks will face each other; crankshaft
gear timing mark at twelve o'clock position and
camshaft gear timing mark at six o'clock
position.
4.Remove gears from shafts and fit to timing
chain.
5.With timing marks aligned, fit timing chain and
gears as an assembly.
6.Restrain the camshaft gear and tighten
retaining bolt to 50 Nm (37 lbf.ft).
7.Fit timing gear cover gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
timing gear cover.
Rocker shaft - overhaul
$% 12.29.49
If both rocker shafts are to be removed, identify
each assembly to ensure refitment to original
cylinder head.
Disassembly
1.Release ht leads from rocker covers.
2.Noting fitted position of 4 long screws or multi-
hex bolts, remove and discard 8 screws/bolts
securing rocker covers; remove rocker covers.
CAUTION: Screws/bolts must be replaced
with new 'patched' multi-hex bolts.