Volkswagen Golf Service & Repair Manual: Checking valve timing, engine codes CHPA, CMBA, CPVA, CXSA, CZCA, CPVB, CZDA
| Special tools and workshop equipment
required |
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Loosen hose clips -1, 2- and
remove air pipe. |
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Move air hoses clear at air pipe. |
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Detach connector from charge pressure sender -GX26-. |
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Release fasteners -arrows-
using release tools -T10527- and -T10527/1-. |
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Press release tabs and disconnect hose
-1- for activated charcoal filter. |
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Remove bolts -arrows- and
detach crankcase breather hose. |
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Remove noise insulation
→ General body repairs, exterior; Rep. gr.66. |
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Drain coolant
→ Chapter. |
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Unscrew bolts -A ... D-, and
push cover -1- for thermostat to
one side. |
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Lay wiring harness to one side
-arrows-. |
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Unscrew bolts -1, 3- and remove
cover -2- for toothed belt for
coolant pump. |
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Unscrew bolts -arrows- and
detach sealing cap -1-. |
| Rotate crankshaft to “TDC” as follows: |
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Remove ignition coil 1 with output stage -N70- and cylinder
1 spark plug
→ Chapter. |
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Insert a screwdriver with a shaft length of at least 250 mm
into spark plug hole so that it contact piston crown. |
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Turn the crankshaft in the normal direction of rotation
until the piston in cylinder 1 shows “BDC”. |
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| The screwdriver moves in the
-direction of the arrow-. |
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Turn the crankshaft further, until the screwdriver has moved
-30 mm- in the
-direction of the arrows- |
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Unscrew plug for “TDC” hole in cylinder block. |
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Screw locking pin -T10340- into cylinder block as far as
stop and tighten to 30 Nm. |
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Rotate crankshaft in normal direction of rotation as far as
stop. |
| The locking pin now rests against the crank web. |
 Note
| Locking pin -T10340- locks crankshaft in direction of engine
rotation only. |
| If locking pin -T10340- cannot be screwed in as far as stop,
this indicates that crankshaft is not in the correct position! |
| In this case, proceed as follows: |
| Turn crankshaft 90° in direction of engine rotation. |
| Screw locking pin -T10340- into cylinder block as far as
stop and tighten to 30 Nm. |
| Turn crankshaft in direction of engine rotation as far as
stop. |
| The asymmetrically positioned grooves on gearbox end of both
camshafts -arrows, upper figure-
must be above the horizontal centre line, as shown in figure. |
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| The grooves on the exhaust camshaft
-upper arrows- can be accessed through the recesses in
toothed belt pulley for coolant pump. |
| On the inlet camshaft the grooves
-lower arrows- must also be positioned right above
horizontal camshaft centre line. |
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If camshafts are not positioned as described, unscrew
locking pin -T10340-, turn crankshaft one rotation further and
return to “TDC” position. |
Note
| The camshaft clamp -T10494- must slide into position easily. |
| Do not knock camshaft clamp into place with any kind of
tool. |
| If the camshaft clamp -T10494- does not easily slide into
position: |
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Use assembly tool -T10487- to push against toothed belt in
-direction of arrow-. |
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Insert camshaft clamp -T10494- as far as stop into camshaft. |
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Tighten bolt -arrow- by hand. |
| If camshaft clamp cannot be fitted: |
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Adjust valve timing: removing toothed belt from camshafts
→ Chapter. |
| If camshaft clamp can be fitted: |
| After completing work, check that locking pin -T10340- and
camshaft clamp -T10494- have been removed. |
| Further assembly is carried out in the reverse order of
removal. |
Note
| Renew bolts that are tightened with specified tightening
angle. |
| Renew O-ring of plug if damaged. |
| → Chapter „Assembly overview - toothed belt“ |
| → Fig. „“Plug for TDC drilling in cylinder block - specified
torque”“ |
| → Chapter „Assembly overview - camshaft housing, engine codes
CHPA, CMBA, CPVA, CXSA, CZCA, CPVB, CZDA“ |
| → Chapter „Assembly overview - crankcase breather system“ |
| → Chapter „Assembly overview - coolant pump, thermostat“ |
| → Chapter „Assembly overview - charge air system“ |
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1 -
Toothed belt
Before removing, mark direction of rotation with chalk or
felt-tipped marker pen.
Check for wear
Remo ...
Special tools and workshop equipment required
Torque wrench -VAS 6583-
Counterhold -T10172- with adapter -T10172/1-
Locking pin -T10340- ...
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Assembly overview - toothed belt, engine codes CPTA, CHPA, CZEA, CZDA
Removing toothed belt from camshafts, engine code CHPA, CZDA