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OM600 ENGINE MECHANICAL 1B3 -- 103
D AEW OO M Y_2000
VALVE TAPPETS
Preceding Work : Removal of camshaft
1 Valve Tappet
2 Cylinder Head
3 Oil Gallery4 Seal Replace.............................
5 Screw Plug
Tools Required
102 589 03 40 00 Magnetic Bar
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1B3 -- 104 OM600 ENGINE MECHANICAL
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Replacement Procedure
1. Pull out the valve tappet (1).
Magnetic Bar 102 589 03 40 00
2. Remove the plug (5) and blow compressed air into
the oil gallery (3). At this time, check that the outlet
bores(arrow) at the seat of the valve tappet are
clear.
3. Replace the seal (4) and tighten the plug (5).
4. Insert the new valve tappet.
Notice
Coat the valve tappet with oil.
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OM600 ENGINE MECHANICAL 1B3 -- 111
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6. Remove the spring retainer(3) and spring (4).
7. Check the valve spring and replace if necessary.
8. Insert valve spring (4) with the color coding (arrow)
facing down and insert valve spring Retainer(3).
9. By press the spring retainer(3) with press lever (90),
install the valve cotters with magnetic finger (10).
Press Lever 667 589 00 31 00
Magnetic Finger 116 589 06 63 00
10. Remove the supporting bar.
11. Remove the holding wheel (7) from the timing chain
(5).
Holding Wheel 603 589 01 40 00
13. Coat the valve tappet with oil and install it.
Magnetic Bar 102 589 03 40 00
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1B3 -- 130 OM600 ENGINE MECHANICAL
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5. Clean the vales, valve seats and valve guides.
6. Coat the valve stem with oil and insert it into valve
guide.
7. Insert the valves (1) into the valve guides according
to marking.
8. Measure amount by which the valve arrears ’a’.
Arrears ’a’0.1 -- 0.7 mm
Notice
If out of standard, replace the valve seat ring.
9. Measure camshaft cam basic diameter (w).
Diameter ’w’38±0.2 mm
or 37.6±0.2 mm
10. Measure distance ’z’ (cylinder head cover parting
surface -- valve stem).
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OM600 ENGINE MECHANICAL 1B3 -- 139
D AEW OO M Y_2000
CAMSHAFT
Preceding Work : Removal of cylinder head cover
1 Bolt 25N∙m (18 lb-ft) ......................
2 Washer
3 Camshaft Bearing Cap
4 Camshaft
5 Dowel Pin
6 Locking Washer
7 Timing Chain8 Cylinder Head
9OilPan
10 Camshaft Sprocket
11 Was h er
12 12-- Sided Bolt (M11)
Check, 25N∙m (18 lb-ft)+90_ ...............
13 Gasket Replace..........................
14 Chain Tensioner 80N∙m (59 lb-ft) ............
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1B3 -- 142 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
7. Remove the camshaft bearing cap.
8. Pull off the camshaft.
Notice
Be careful not to miss front locking washer.
9. Pull out the locking washer.
Notice
Check the condition of locking washer and replace if
necessary.
Installation Procedure
1. Insert the locking washer.
2. Check the valve tappet and ensure that tappet
moves smoothly.
3. Coat the camshaft with oil and install the camshaft
onto the cylinder head so that the TDC marking (ar-
row) is positioned upward vertically.
4. Install the camshaft bearing caps according to
markings(1, 2, 3 etc.).
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1B3 -- 144 OM600 ENGINE MECHANICAL
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Notice
If max. length ’L’ of the 12-- sided bolt exceeds
53.6mm, replace it.
8. Install the chain tensioner.
Tightening Torque80 N∙m (59 lb-ft)
Notice
Replace the seal.
Before installation, by pumping in the oil approx. 10
times, fill the oil.
9. Remove the engine lock.
10. Check the TDC marking of OT on the crankshaft.
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1B3 -- 146 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Notice
Always install the chain tensioner to be filled with oil.
Place the chain tensioner in engine oil up to over the
collar on the hexagon headwith the thrust pin facing
up. Slowly push down the thrust pin as far as the
stop 7~10 times with the aid of a press or a column
drill
Faulty chain tensioners should be replaced com-
pletely.
3 Screw Plug
4 Aluminum Gasket
5Ball
6 Ball Guide
7 Compression Spring
8 Compression Spring
9 Housing
10 Thrust Pin11 Valve Disc
12 O -- Ring
13 Snap Ring
14 Compression Spring
15 Filler
A Feed Bore from Cylinder Head
BToOilPan