3 Series E46 320d (M47) SAL
If work is carried out on the crank drive or piston, the seal
thickness must be redetermined.
Measuring the piston clearance:
Place dial gauge with measuring fixture special tool 00 2 530
on the cleaned cylinder head sealing face and set the preload to
zero.
Clean piston at measuring points (1 and 2).
Place dial gauge at measuring point (1) on cleaned piston and
determine highest point by rotating crankshaft.
Measure and note down piston protrusion at measuring
points (1 and 2) on all 4 pistons.
The highest piston protrusion at the measuring points (1 and 2)
of all 4 pistons determines the thickness of the cylinder head
gasket.
Piston protrusion up to 0.91 mm
-
Install 1 hole cylinder head gasket.
Piston protrusion 0.92 ... 1.03 mm
-
Install 2 hole cylinder head gasket.
Piston protrusion over 1.03 mm
-
Install 3 hole cylinder head gasket.
Note:
To avoid damaging the valves when the camshafts are later
installed, it is necessary to crank the engine to 45
°
before
TDC.
Lift timing chain and hold under tension.
Crank engine at central bolt approx. 45
°
against direction of
rotation.
RA Removing and installing cylinder head (M47)
BMW AG - TIS
12.02.2013 12:40
Issue status (12/2007) Valid only until next DVD is issued
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