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M161 ENGINE MECHANICAL 1B2 -- 29
D AEW OO M Y_2000
Removal & Installation Procedure
1. Disconnect the camshaft adjuster connector and re-
move the camshaft adjuster (E23 engine only).
Installation Notice
Tightening Torque
9--11NSm (80 -- 97 lb-in)
2. Remove the cylinder head front cover.
Installation Notice
Tightening
Torque (3)
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
Tightening
Torque (4)9--11NSm
(80 -- 97 lb-in)
Apply the sealant at the mating surface of the cylinder
head and the front cover.
3. Remove the O -- ring.
Installation Notice
Replace the O -- ring with new one and apply the seal-
ant.
4. Installation should follow the removal procedure in
the reverse order.
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M161 ENGINE MECHANICAL 1B2 -- 31
D AEW OO M Y_2000
Tools Required
617589001000 AllenWrenchSocket
116 589 20 33 00 Sliding Hammer
116 589 01 34 00 Threaded Pin
111 589 03 15 00 Holding Pin
Removal & Installation Procedure
1. Rotate the crankshaft so that the piston of number 1
cylinder is at ATDC 20.
2. Put the holding pin 111 589 03 15 00 into the cam-
shaft bearing cap (number 1, 6).
3. Put the alignment marks (arrows) on the timing chain
and camshaft sprocket.
4. Remove the chain tensioner.
Installation Notice
Tightening Torque
72 -- 88 NSm (53 -- 65 lb-ft)
5. Remove the exhaust camshaft sprocket.
Installation Notice
Ti
ghteningTo rque
1st step: 18 -- 22 NSm
(13 -- 16 lb-ft)
TighteningTorque
2nd step: 60°±5°
Notice:The flange bolt is designed to be used only
once, so always replace with new one.
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1B2 -- 32 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
6. Remove the intake camshaft sprocket (E20 engine).
7. Remove the camshaft adjuster (E23, M161.970 en-
gine).
Installation Notice (Flange Bolt)
Ti
ghteningTo rque
1st step: 18 -- 22 NSm
(13 -- 16 lb-ft)
TighteningTorque
2nd step: 60°±5°
Notice:The flange bolt is designed to be used only
once, so always replace with new one.
1 Flange Shaft
2FlangeBolt
3 Compression Spring
4 Adjust Piston
5 Camshaft Sprocket
6 Seal Cover
7Nut
8. Remove the guide rail pin using the sliding hammer
116 589 20 33 00 (02) and the threaded pin 116 589
01 34 00 (03).
Notice:Apply the sealant on guide rail pin when installa-
tion.
9. Unscrew the bolts (A).
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
Bolt (A) : (M8 X 35, 4 pieces)
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M161 ENGINE MECHANICAL 1B2 -- 33
D AEW OO M Y_2000
10. Remove the cylinder head bolts in the reverse order
of the numerics (No.10→No.1) using allen wrench
socket617589001000.
Installation Notice
Tighten the bolts as numerical order with specified
torque (No.1→No.10).
1st step: 55 NSm (41 lb-ft)
Tightening Torque2nd step: + 90°ggq
3rd step: + 90°
Notice:Operate during engine cooling.
11. Remove the No. 1 bearing cap of the exhaust cam-
shaft.
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
12. Carefully remove the cylinder head.
13. Check the cylinder head mating surface and clean
the crankcase head bolt mounting hole.
14. Replace the cylinder head gasket with new one.
15. Check the length of the cylinder head bolt.
Installation Notice
Length(L)When New 100 mmLength(L)Max. Length 105 mm
Notice:Replace the bolt if the measured length exceed
the max. length.
16. Installation should follow the removal procedure in
the reverse order.
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M161 ENGINE MECHANICAL 1B2 -- 35
D AEW OO M Y_2000
Tools Required
116 589 20 33 00 Sliding Hammer
116 589 01 34 00 Threaded Pin
Removal & Installation Procedure
1. Remove the power steering belt pulley and A/C com-
pressor bracket.
2. Remove the oil line from power steering pump.
3. Rotate the crankshaft so that the piston of number,
cylinder is at ATDC20°.
4. Put the alignment marks (arrows) on the timing chain
and camshaft sprocket.
5. Remove the chain tensioner.
Installation Notice
Tightening Torque
72 -- 88 NSm (53 -- 65 lb-ft)
6. Remove the intake and exhaust camshaft sprocket
(remove the camshaft adjuster assembly in E23 en-
gine).
Installation Notice
Ti
ghteningTo rque
1st step: 18 -- 22 NSm
(13 -- 16 lb-ft)
TighteningTorque
2nd step: 60°±5°
Notice:The flange bolt is designed to be used only
once, so always replace with new one.
7. Remove the guide rail pin using the sliding hammer
116 589 20 33 00 (02) and the threaded pin 116 589
01 34 00 (03).
Notice:Apply the sealant on guide rail pin when installa-
tion.
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1B2 -- 36 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
8. Unscrew the bolts (A).
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
9. Remove the belt pulley and vibration damper.
Installation Notice (Center Bolt)
Ti
ghteningTo rque
1st step: 200 + 20NSm
(148 + 15 lb-ft)
TighteningTorque
2nd step: 90°+10°
10. Unscrew the bolts (1, 2) on timing gear case cover
and remove the timing gear case cover.
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
Notice:Be careful not to damage the cylinder head gas-
ket.
11. Remove the radial shaft seal.
Notice:Installation note replace the seal with new one.
12. Clean the timing gear case cover and crankcase
sealing surface.
13. Replace the O -- ring with new one and apply the
sealant on the sealing surface.
Notice:Be careful not to stain the oil chamber of chain
tensioner with the sealant.
14. Installation should follow the removal precedure in
the reverse order.
15. Warm up the engine and check for oil leaks.
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1B2 -- 38 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
601 589 03 43 00 Crankshaft Rear Seal Installer
Removal & Installation Procedure
1. Unscrew the bolts (1) and (5) and remove the closing
cover by pulling the rear cover lug (arrows).
Notice:Be careful not to damage the oil pan gasket.
2. Clean the sealing surface of the crankcase and the
rear sealing cover.
3. Check the radial shaft seal and replace it if necessary.
4. Apply the Loctite 573 to the rear cover sealing sur-
face.
5. Apply the engine oil to the dust lip of the radial shaft
seal.
Notice:Do not use the grease.
6. Install the crankshaft rear radial seal and the crank-
shaft sealing rear cover, using crankshaft rear seal in-
staller 601 589 03 43 00.
7. Install the crankshaft sealing rear cover mounting
bolts and remove the crankshaft rear seal installer
601 589 03 43 00.
Installation Notice
Tightening Torque
9--11NSm (80 -- 97 lb-in)
8. Installation should follow the removal procedure in
the reverse order.
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M161 ENGINE MECHANICAL 1B2 -- 41
D AEW OO M Y_2000
Tools Required
602589004000 EngineLock
Removal & Installation Procedure
1. Adjust the piston of number 1 cylinder to the TDC.
2. Remove the start motor and install the engine lock
602 589 00 40 00 to the flywheel ring gear.
3. Remove the vibration damper center bolt.
Installation Notice
Ti
ghteningTo rque
1st step: 200 + 20 NSm
(148 + 15 lb-ft)
TighteningTorque
2nd step: 90°+10°
4. Remove the vibration damper assembly using the
puller.
5. Installation should follow the removal procedure in
the reverse order.
Notice:If possible, don’t separate the vibration damper
and the pulley.