Ford Galaxy / Ford S-MAX. Manual — part 190

Description

Exhaust camshaft

Intake camshaft

Valve cover / upper camshaft bearings

CMP sensor for intake camshaft

Intake camshaft reference mark

Exhaust camshaft reference mark

CMP sensor for exhaust camshaft

Recesses are provided on the ends of the camshafts; these are for attaching the new
special tool (Locking Tool, Camshaft 303-1183) for locking the camshafts.

Threads have been cut into the camshafts for attaching the special tool (303-1178).

NOTE: The new special tool (303-1178) can only be attached when the camshafts are
precisely set to the timing marks.

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7

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Refer to the workshop literature for the exact procedure for attaching and using the new
special tool (303-1178).

For detection of the CMP sensor signals, reference marks in the form of grooves have been
machined into the ends of the camshafts. When the camshafts are set precisely to the
timing marks, the machined mark on the exhaust camshaft is located roughly at the 5
o'clock position and the machined mark on the intake camshaft is located at 8 o'clock.

No marks have been provided on the camshafts in production; we therefore recommend
marking the camshafts before removing them.

Camshaft bearings

Valve cover and cylinder head

Description

Camshaft bearings

Valve cover

Cylinder head

Spark plug well sealing ring

Exhaust camshaft

Intake camshaft

The camshafts are supported in the cylinder head (lower camshaft bearings) and in the
valve cover (upper camshaft bearings) by six bearings.

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6

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VCT (Variable Camshaft Timing)

VCT control units

The engine oil is pumped from the oil pan via the VCT oil control solenoids to the control
units of the intake and exhaust camshaft as needed. Here, the camshaft timing is advanced
or retarded, based on the input signals from the PCM.

The VCT control units for the intake and exhaust camshafts are moved into the locked base
position when the engine is stopped through the engagement of a spring-loaded locking
pin.

The movement to the locked base position is assisted by the tensile force of the timing belt
for the intake VCT control unit.

With the exhaust VCT control unit, a spring inside the control unit additionally assists in
reaching the locked base position.

The intake VCT control unit is in the "retarded timing" position and the exhaust VCT control
unit is in the "advanced timing" position when in the locked base position. When the engine
is started, the lock is hydraulically released when a certain EOP (Engine Oil Pressure) is
reached.

The procedures must therefore be strictly adhered to when performing adjustment work.

The intake and exhaust VCT control units can only be replaced as complete units during
servicing.

Timing retard

Description

Camshaft pulley

Spring-loaded locking pin

Rotor

Rotor vane

Plunger

Return spring

VCT oil control solenoid

Duct connected to chamber (a)

Duct connected to chamber (b)

Oil feed duct

Oil return duct

The engine oil is drawn from the oil pan and routed to the camshaft oil ducts via the engine
oil circuit before being routed from there to the VCT oil control solenoid (7) and to the
locking pin (2). This releases the locking pin (2) and separates the positive engagement
between the camshaft pulley (1) and the rotor (3). When the control unit is being retarded,
the chamber (b) fills with engine oil. The rotor (3) starts to turn clockwise as a result of the
EOP prevailing in the chamber (b). The engine oil returning from the chamber (a) flows via
the oil return duct (D) to the VCT oil control solenoid and from there back into the oil pan.

Timing advance

Item

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2

3

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6

7

A

B

C

D

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