Ford Falcon. Manual — part 117
303-01a-39
Engine — I6
303-01a-39
IN-VEHICLE REPAIR (Continued)
6. Do not use the chain to prevent rotation when
7. Whilst holding the VCT phaser and timing chain,
loosening the central bolt as this load will be
slide the VCT phaser forward off the camshafts
transmitted through the locked phaser mechanism
and rest on top of the timing cover.
and could cause damage.
NOTE: Do not remove the timing chain from the
VCT phasers.
8. Remove
the
tool.
9. Loosen the camshaft cap bolts 2 turns at a time in
the order shown below.
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303-01a-40
Engine — I6
303-01a-40
IN-VEHICLE REPAIR (Continued)
10. Remove camshaft caps.
3. Fit the respective Intake and Exhaust camshafts
with the timing pin positioned vertically upwards.
11. Remove inlet & exhaust camshaft.
Take care not to damage the thrust surfaces on
journal #2.
Camshaft Installation
Installation
1. Check the camshaft journal clearance.
2. Lubricate the head-cam bearing surfaces with
engine oil.
4. Check for burrs and damage on the cap-to-head
joints and the cam-to-VCT phaser joint. Tighten
bolts 2 turns at a time in the same order shown in
the removal section.
NOTE: The cam-cap oil passage must be
absolutely clean.
NOTE: Use the following illustration to identify the
5. Rotate the crankshaft so the VCT timing marks
Exhaust and Inlet camshafts.
(on the sprocket) are vertically upwards and the
crankshaft at Top Dead Centre.
6. Align the marked the two timing chain links with
the VCT timing marks sprocket.
NOTE: The yellow and orange coloured links
used for original assembly, and assembly with the
front cover removed, are only synchronized with
the timing marks once every 38 crankshaft
revolutions, and should be ignored when working
with the front cover in place (unless
synchronized).
Item
Description
1
Exhaust
2
Inlet
NOTE: If a camshaft timing error is suspected, and it
is necessary to check the basic cam timing using the
valve lift loss method, then the cams must be fully
advanced and both VCT Phaser locking pins
engaged.
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303-01a-41
Engine — I6
303-01a-41
IN-VEHICLE REPAIR (Continued)
7. Check that the cams are fully advanced and the
1. Release the timing chain tension by compressing
locking pins engaged by gripping each camshaft
the tensioner. Refer this section.
between the journals numbers 4 & 5 with a
suitable wrench using soft protective pads, and
attempt to rotate the camshaft backwards and
forwards relative to the VCT Phaser.
8. Establish the point of maximum lift on a No. 1
cylinder intake cam lobe by determining the
positions where the lift is reduced by 0.25 mm
either side of maximum lift. Note the crankshaft
angles while rotating the crankshaft in a clockwise
direction only.
9. Average the two crankshaft angles to give the
point of maximum lift.
10. Repeat this procedure for the No.1 cylinder
exhaust cam lobe.
11. Check the piston TDC in a similar way by fitting
VCT Phaser
an adaptor in the spark plug hole in cylinder No. 1
with an adjustable length pin protruding into the
Special Tool(s)
cylinder so that it just prevents the piston from
reaching TDC. Lock the adjustment using a
Camshaft holding tool
suitable locknut.
303-778
12. Rotate the engine clockwise until the piston
touches the pin and noting the crankshaft angle,
and then rotating it anti-clockwise, and again note
the angle.
13. Average the two crankshaft angles to give TDC,
and compare it to the timing mark on the
Removal
Crankshaft Vibration Damper to ensure that the
1. Remove valve cover. Refer to Valve Cover in this
Damper outside element has not rotated. If there
section.
is a significant discrepancy, replace the Damper.
Refer to Crankshaft Vibration Damper in this
2. Fit the SST 303-778 to the camshafts in the
section.
central position between caps and tighten to
prevent rotation.
Standard Intake Cam
Maximum lift @ 97.5
°
Timing
ATDC
Standard Exhaust Cam
Maximum lift @ 126.5
°
Timing
BTDC
Timing Chain Tensioner
Special Tool(s)
Timing chain tensioner special
service tool
303-777
3. Loosen the bolt attaching the VCT units to the
camshafts.
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303-01a-42
Engine — I6
303-01a-42
IN-VEHICLE REPAIR (Continued)
4. Do not use the chain to prevent rotation when
3. The filters and cam cap oil passages must be
loosening the central bolt as this load will be
absolutely clean.
transmitted through the locked phaser mechanism
and could cause damage.
Rocker Arm, Lash Adjuster, Valve
5. Whilst holding the VCT phaser and timing chain,
Spring and Valve Stem Seal
slide the VCT phaser forward off the camshafts
and rest on top of the timing cover.
1. Disassemble in the order indicated in the table.
NOTE: Do not remove the timing chain from the
VCT phasers.
6. Remove
the
tool.
Installation
1. To install, reverse the removal procedure.
2. The oil control valves & cam cap bores must be
absolutely clean.
Item
Description
1
Cam follower
2
Lash adjuster retaining clip
3
Lash adjuster
4
Valve spring retainers
5
Valve spring retainer keys
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