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Toothed Belt Tension, Adjust
Note: Testing is
performed with the engine cold – at room temperature.
 Remove
Remove air cleaner housing with air intake cover – see
illustration "Air Ducts (X 16 SZR)" and illustration "Air Ducts (Z
16 SE)".
Remove upper part of toothed belt cover – see operation
"Toothed Belt Cover – Upper Part, Remove and Install".
Remove ribbed V-belts – see operation "Ribbed V-belts,
Remove and Install".
Remove ribbed V-belt tensioner – see operation "Ribbed
V-belt Tensioner, Remove and Install".
Remove lower part of toothed belt cover – see operation
"Toothed Belt Cover – Lower Part, Remove and Install".
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 Adjust
Screw fastening bolt of torsional vibration damper into
crankshaft and turn crankshaft in engine rotational direction until
pointer on toothed belt drive gear aligns with mark on oil pump
housing. At the same time, notch on camshaft pulley must be aligned
with mark on rear toothed belt cover.
Release fastening bolts for coolant pump.
For X 16 SZR engine and Z 16 SE engine with old coolant pump
version: Tension toothed belt by turning coolant pump in direction
of arrow (clockwise) with KM-421-A until pointer (1) is just before
right stop.
For Z 16 SE engine with new coolant pump version: Tension
toothed belt by turning coolant pump in direction of arrow
(clockwise) with KM-421-B until pointer (1) is just before right
stop.
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Turn crankshaft two revolutions (720°) in engine rotational
direction, until timing marks align. Turn crankshaft slowly and
uniformly and do not change position of coolant pump.
For X 16 SZR engine and Z 16 SE engine with old coolant pump
version: Slacken toothed belt tension by turning coolant pump with
KM-421-A in direction of arrow until pointer (1) and notch (2) on
toothed belt tension roller base plate are aligned.
For Z 16 SE engine with new coolant pump version: Slacken
toothed belt tension by turning coolant pump with KM-421-B in
direction of arrow until pointer (1) and notch (2) on toothed belt
tension roller base plate are aligned.
Turn crankshaft another two rotations (720°) in engine
rotational direction to mark "1st cylinder TDC" and check
adjustment of toothed belt tension roller. If the marks are not
aligned, repeat the adjustment procedure.
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Torque
Coolant pump to cylinder block – tightening torque 8 Nm /
6 lbf. ft.
Install
Remove fastening bolt from toothed belt drive gear and install
toothed belt cover, lower part – see operation "Toothed Belt
Cover, Lower Part, Remove and Install".
Install ribbed V-belt tensioner – see operation "Ribbed
V-belt Tensioner, Remove and Install".
Install ribbed V-belt – see operation "Ribbed V-belt,
Remove and Install".
Install upper part of toothed belt cover – see operation
"Toothed Belt Cover – Upper Part, Remove and Install".
Install air cleaner housing with air intake cover – see
illustration "Air Ducts (X 16 SZR)" and illustration "Air Ducts (Z
16 SE)".
Check cooling system for leaks – see operation "Cooling
System, Check for Leaks".
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