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fig.6
3.3.2
Place VS4868-2 Camshaft Setting Plate on to the rectangular
section at the rear of the EXHAuST camshaft, and ensure the
Plate rests fully on the surface of the cylinder head (Do not
insert fixing bolts) (fig.6).
If timing is correct, VS4868-2 should rest on the cylinder head
without any gap, or at most, raised 1.0mm to the exhaust side
only.
If the above position cannot be achieved with the Setting Plates,
then it will be necessary to adjust the timing.
remove the Camshaft Setting Plates.
3.4
Adjusting timing
fig.7
3.4.1
Slacken the bolts of the VANOS units on the inlet and exhaust
camshafts (fig.7).
WARNING: These bolts are likely to be tight. It will be
necessary to counter-hold against engine rotation at the
crankshaft pulley centre bolt. Do NOT rely on the Flywheel
Pin to counter-hold when loosening these bolts.
3.4.2 Screw in the VANOS Unit bolts to finger-tight only, sufficient so
there is no play or tilt on the units.
3.4.3 Ensure that the VS4801 Flywheel TDC Locking Pin is fitted into
the timing hole in the flywheel.
fig.8
3.4.5
Place VS4868-1 Camshaft Setting Plate on to the rectangular
section at the rear of the INLET camshaft, ensuring that the
curved edge of the rectangular plate is uppermost. Align the
camshaft so the Setting Plate rests fully on the surface of the
cylinder head (Do not insert fixing bolt at this stage) (fig.8).
fig.9
3.4.6
Fit VS4868-2 Camshaft Setting Plate on to the rectangular
section at the rear of the EXHAuST camshaft, ensuring that the
curved edge of the rectangular plate is uppermost. Align the
camshaft so the Plate rests fully on the surface of the cylinder
head (fig.9).
3.4.7
Screw in the two fixing bolts and tighten to secure the
Setting Plate VS4868-2 to the cylinder head.
fig.10
3.4.8
Screw in VS4805-3 Securing Screw into Setting Plate VS4868-2
until it presses on Setting Plate VS4868-1 (fig.10).
Screw in the fixing bolt for VS4868-1 and tighten to secure
3.4.9
this Setting Plate to the cylinder head.
3.5
VS4803 Timing Chain Tensioner Pre-Load Tool
fig.11
3.5.1
remove the timing chain tensioner, and in its place insert
VS4803 Tensioner Pre-Load Tool (fig.11).
3.5.2
Screw in the adjusting screw of VS4803, by hand, until it makes
contact with the tensioner rail but does not apply pressure.
3.5.3
remove the old bolts of the VANOS units on the inlet and
exhaust camshafts and fit new bolts. Screw in the bolts to
finger-tight only, sufficient so there is no play or tilt on the units.
3.6
VS4869 Vanos Alignment Plate
fig.12a
3.6.1
Fit VS4869 VANOS Alignment Tool to the front of the units
ensuring that its two location pins enter into the holes in the
VANOS Units (fig.12b) and that the Alignment Tool fits fully on to
the surface of the cylinder head (fig.12a).
fig.13
3.6.2
Screw in the two bolts and tighten to secure VS4869 to the
cylinder head. Slacken the VANOS unit bolts half turn and
re-tighten to finger-tight (fig.13).
fig.12b
VS4870
Issue No: 1 - 07/04/09
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