Facom DT.BMW Manual De Instrucciones página 13

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DT.4551 Camshaft Setting Plate
The accuracy of the timing position of both camshafts, is confi rmed by fi tting DT.4551 Setting Plate, fi rst to the Inlet camshaft and then to the exhaust
camshaft.
The Setting Plate is fi tted on to the front part of the camshaft and must make full contact with both sides of the camshaft cover gasket face.
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Remove the Setting Plate, reverse the Plate and fi t it onto the front part of exhaust camshaft. Again, check that the Setting Plate is making full contact, with
both sides, of the gasket face.
IMPORTANT: If the Camshaft Setting Plate does not fully contact the camshaft cover gasket face, on both sides, then timing adjustment will be required.
Timing Adjustment
Camshaft timing adjustment is achieved by releasing the camshaft sprockets from the camshafts and adjusting the position of the camshafts using DT.4551
Camshaft Setting Plate and DT.4552 Cam Plate Locking Tool.
To access to the camshaft sprockets it will probably be necessary to release the engine mounting bracket to the Hydramount and raise the engine position.
Position crankshaft at TDC with Pin DT.4146-2 and counter-hold each camshaft in turn, with a spanner on the hexagon on the camshafts, and undo the sprocket screws.
Discard old screws and fi t new ones to retain sprockets loosely on the camshafts so they are free to rotate but not able to tilt.
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Fix the base of DT.4552 Cam Plate Locking Tool to the engine. Allow DT.4552 top clamping arm to remain loose.
Carefully align the inlet camshaft using DT.4551 Setting Plate fi tted at the front of the camshaft, and ensure the Setting Plate rests fully on both sides of the
gasket surface. Clamp the Setting Plate in place by fi xing the top clamping arm of DT.4552 on it, tightly secure the arm.
Counter-hold the inlet camshaft with a spanner at the hexagon provided, and using a suitable angle torque gauge, tighten the sprocket screw to 20Nm. + a further 35°.
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Release the top clamping arm of DT.4552, reverse DT.4551 Setting Plate and position onto the exhaust camshaft. Repeat the procedure above - as used on the inlet camshaft.
Remove all tools and turn the crankshaft two revolutions, in direction of normal engine rotation, and return to TDC position at No1 cylinder.
Insert DT.4146-2 TDC Pin and check both camshaft positions using DT.4551 Plate as per 'Checking Timing' instructions.
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DT.4413 Tensioner Retaining Pins (Pair)
For removal of camshafts, sprockets, timing chains the chain tensioner MUST BE 'locked back' to release tension off the timing chain.
Remove the chain tensioner access plug from the timing cover and slowly turn the exhaust camshaft clockwise to fully compress the chain tensioner. 'Lock'
tensioner using one of the DT.4413 Retaining Pins.
WARNING: If the camshaft sprockets are removed without fi rst locking the hydraulic chain tensioner, its piston will eject. Considerable
force will then be required to compress it back in place.
M41 and M51 CHAIN DRIVE Diesels
-Refer to Application Chart for details of models/engines
These BMW diesel engines require the following timing tools from DT.BMW.
DT.4146-2 Crankshaft/Flywheel TDC Locking Pin
DT.4412 Camshaft Setting Plate
DT.4413 Tensioner Retaining Pins (Pair)
DT.4415 Tensioner Lever
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DT.4146-2 Crankshaft TDC – Flywheel Locking Pin
DT.4146-2 Pin is inserted to 'lock' the fl ywheel to position the crankshaft at TDC. A timing hole is provided in the cylinder block. DT.4146-2 passes through this
hole and in to a datum hole in the fl ywheel.
NOTE: These holes can become corroded/constricted and may require cleaning out to enable the Pin to be inserted.
With the crankshaft 'locked' at TDC, the camshaft lobes above cylinder 6 will be pointing approx. 45 degrees upwards. Cam lobes above No1 cylinder will be pointing vertically upwards.
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DT.4412 Camshaft Setting Plate
The accuracy of the camshaft timing position is confi rmed by fi tting DT.4412 Setting Plate onto the fl ats of the camshaft and for M41 engines, and additionally
for M51 engines with timing chains, which are new, or with less than 12,500 miles (20,000 km), the DT.4412 Plate must rest fully on the surface of the
cylinder head.
NU-DT.BMW_0606.indd 13 NU-DT.BMW_0606.indd 13 21/06/2006 07:52:30 21/06/2006 07:52:30