VW Tiguan Service & Owner's Manuals
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Table of Contents > Cylinder head, valve gear > Chain drive

VW Tiguan 4-cyl. Direct Injection Engine (1.8l and 2.0l, EA 888 gen III) ➜ Chain drive

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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
3
Chain drive  
β‡’ o3.1 verview - camshaft timing chains”, page 168  
β‡’ a3.2 nd installing camshaft timing chain”, page 171  
β‡’ o3.3 verview - drive chain for balance shaft”, page 187  
β‡’ a3.4 nd installing drive chain for balance shaft”, page 190  
β‡’ t3.5 iming chain”, page 190  
β‡’ v3.6 alve timing”, page 191  
3.1  
Assembly overview - camshaft timing  
chains  
Note  
♦ After working on the chain drive, adapt learnt values in en‐  
gine control unit. To do this, switch on ignition, and select  
the following menu options on vehicle diagnostic tester:  
♦ 0001 - Engine electronics, functions  
♦ 0001 - Basic setting  
♦ Timing chain length compensator, reset after re-  
newing chain  
168  
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02.2021  
1 - Bolt  
❑ Renew aluminium bolts  
after removal  
❑ Aluminium bolts 4 Nm  
+90Β°  
❑ Steel bolts: 9 Nm  
2 - Chain tensioner  
❑ Is spring-loaded  
❑ Secure with locking tool  
-T40267- before remov‐  
ing.  
3 - Tensioning rail for timing  
chain  
4 - Guide pin  
❑ 20 Nm  
5 - Bolt  
❑ Renew  
❑ Specified torque and  
tightening sequence β‡’  
page 170  
6 - Clamping sleeve  
❑ Not fitted on all bearing  
saddles, depending on  
version  
❑ Is pulled into cylinder  
head together with se‐  
curing bolt  
7 - Timing valves  
❑ Left-hand thread  
❑ Depending on version,  
remove using remov‐  
al tool -T10352/2- or -  
T10352/4-.  
❑ Checking β‡’ page 169  
❑ 35 Nm  
8 - Bearing saddle  
❑ Depending on version, with spring pin; for allocation refer to β‡’ Electronic parts catalogue (ETKA)  
❑ Specified torque and tightening sequence β‡’ page 170  
9 - Guide rail for camshaft timing chain  
10 - Camshaft case  
11 - Camshaft timing chain  
❑ Removing and installing β‡’ page 171  
12 - Guide rail for camshaft timing chain  
13 - Guide pin  
❑ 20 Nm  
14 - Triple chain sprocket  
❑ Crankshaft  
❑ Fitting position β‡’ page 170  
Checking control valve  
3. Chain drive  
169  
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02.2021  
– It must be possible to press in piston -1- approx. 3 mm  
against spring force. It must move freely, without sticking.  
Bearing saddle - specified torque and tightening sequence  
If a spring pin is installed, it is pulled into the cylinder head  
together with bolt -1-.  
– Tighten bolts in stages in the sequence shown.  
Bearing saddle with spring pin and steel bolts  
Stage  
Bolt  
Specified torque/turning further angle  
for steel bolts  
1
2
-1-  
-1 to 6-  
3 Nm  
9 Nm  
Bearing saddle without spring pin and with aluminium bolts  
Stage  
Bolt  
Specified torque/turning further angle  
for aluminium bolts  
1
2
-1 to 6-  
-1 to 6-  
4 Nm  
180Β°  
Triple chain sprocket - installation position  
170  
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02.2021  
β€’
The two sections -arrows- must be aligned.  
3.2  
Removing and installing camshaft timing chain  
Special tools and workshop  
equipment required  
♦ Depending on version assembly tool -T10352/2- or -  
T10352/4-  
♦ Counter-hold tool -T10355-  
♦ Pin -T40011-  
3. Chain drive  
171  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
♦ Assembly lever -T40243-  
♦ Locking tool -T40267-  
♦ Camshaft clamp -T40271-  
♦ Assembly tool -T40266-  
♦ Assembly tool -T10531-  
Components of assembly tool -T10531-:  
♦ Support -T10531/1-  
♦ Clamping pin -T10531/2-  
♦ Turning over tool -T10531/3-  
♦ Flange nut -T10531/4-  
Removing  
– Support engine in its installation position β‡’ page 51 .  
– Removing engine mounting β‡’ page 72 .  
– Remove engine support β‡’ page 98 .  
– Remove timing chain cover (top) β‡’ page 159 .  
– Remove noise insulation β‡’ General body repairs, exterior;  
Rep. gr. 66; Noise insulation; Assembly overview - noise  
insulation.  
– Remove front part of right wheel housing liner, or remove  
right wheel housing liner β‡’ General body repairs, exterior;  
Rep. gr. 66; Wheel housing liner; Removing and installing  
front wheel housing liner.  
– Turn vibration damper to β€œTDC position” using counter-hold  
tool -T10355-.  
172  
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02.2021  
β€’
β€’
The markings -1- on the camshaft sprockets must align with  
markings -2- and -3-.  
The notch on the vibration damper must align with the mark‐  
ing on the lower timing chain cover -arrow-.  
– Remove lower timing chain cover β‡’ page 162 .  
Note  
♦ The timing valves have left-hand threads.  
♦ Depending on the version, different timing valves may be  
installed. Use the appropriate assembly tool -1-.  
– Turn assembly tool -T10352/2- or -T10352/4- in  
-direction of arrow- to remove left and right timing valves.  
– Remove bolts -arrows- and detach bearing saddle.  
3. Chain drive  
173  
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02.2021  
– Unscrew bolts -arrows-.  
– Screw in lever -T40243- -arrows-.  
– Press together retaining ring -1- of chain tensioner and hold  
it in that position.  
– Slowly push lever -T40243- in -direction of arrow-, and hold  
it in that position.  
– Secure chain tensioner with locking pin -T40267-.  
174  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Remove lever -T40243-.  
– Screw camshaft clamp -T40271/2- onto cylinder head, and  
insert it in teeth of chain sprocket (direction of arrow -2-). If  
necessary, turn inlet camshaft using assembly tool -T40266-  
-arrow 1-.  
– Bolt camshaft clamp -T40271/1- to cylinder head.  
A second mechanic is required for the following work step.  
– Using assembly tool -T40266-, locate exhaust camshaft in  
direction of arrow -A-. Remove bolt -1- and guide tensioning  
rail -2- downwards. Turn exhaust camshaft clockwise -A-  
until camshaft clamp -T40271/1- can be inserted in teeth of  
chain sprocket -C-.  
– Remove guide rail -1-. To do this, use a screwdriver to re‐  
lease catch -arrow-, and press off guide rail forwards.  
3. Chain drive  
175  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Unscrew bolts -arrows-, and remove chain tensioner -1-.  
– Press tensioning bar of oil pump chain tensioner in direction  
of -arrow- and lock it with locking pin -T40011-.  
– Unscrew bolt -1-, and remove chain tensioner.  
– Unscrew bolts -1-, and remove guide rail -2-.  
176  
Rep. gr.15 - Cylinder head, valve gear  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Remove camshaft timing chain from camshaft sprockets and  
fit it onto camshaft journals -arrows-.  
– For vehicles with all-wheel drive: unbolt right drive shaft from  
gearbox.  
– Remove chain tensioner -1- for balance shaft timing chain.  
– Unscrew bolts -1-. Remove tensioning rail -2- and guide rails  
-3- and -4-.  
3. Chain drive  
177  
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02.2021  
– Loosen tensioning bolt -A-, and unscrew cotter pin -B-.  
– Remove triple chain sprocket. To do this, remove timing  
chain for oil pump drive.  
– Remove camshaft timing chain and drive chain for balance  
shaft.  
Installing  
– Check if crankshaft is positioned at TDC. The flat section on  
crankshaft -arrow- must be in horizontal position.  
– Using a permanent felt tip marker, make a marking on cylin‐  
der block -1-, as shown in illustration.  
– Mark tooth -1- of triple chain sprocket which is aligned with  
marking -2- using a permanent felt tip marker.  
178  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Turn idler gear and balance shaft so that markings -arrow-  
are aligned as shown in illustration. Do not loosen bolt -1-.  
The markings on idler gear and balance shaft are difficult to  
see.  
– Fit drive chain for balance shafts. Position chain links with  
coloured markings -arrows- at markings on chain sprockets.  
– Install guide rail -1-, and tighten bolts -arrows-.  
3. Chain drive  
179  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Fit camshaft timing chain onto camshaft journals with col‐  
oured markings -arrows- properly aligned.  
– Fit timing chain for oil pump drive onto triple chain sprocket.  
– Swing triple sprocket towards engine (-direction of arrow-),  
and fit it onto crankshaft. The markings -arrows- must align.  
180  
Rep. gr.15 - Cylinder head, valve gear  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
I - Screw clamping pin -T10531/2- into crankshaft, and tighten it  
by hand.  
II - Fit turning over tool -T10531/3-. Screw on flange nut -  
T10531/4- by hand. Slightly move turning over tool back and  
forth with a 32 mm open-end spanner. While doing so, retighten  
flange nut until the chain sprocket is securely seated on the  
crankshaft splines. Now, tighten tensioning bolt -A-.  
– Position link of drive chain for balance shafts with coloured  
marking -arrow- at marking of triple sprocket. Install tension‐  
ing rail -1- and guide rail -2-. Tighten bolts -3-.  
– Install chain tensioner -1-.  
– Make sure that adjustment has been carried out correctly:  
chain links with coloured markings -arrows- must be posi‐  
tioned at markings on chain sprockets.  
– Fit camshaft timing chain on inlet camshaft, exhaust cam‐  
shaft and crankshaft. Position chain links with coloured  
markings -arrows- at the markings on chain sprockets.  
3. Chain drive  
181  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Install guide rail -2-, and tighten bolts -1-.  
– Install upper guide rail -1-.  
A second mechanic is required for the following work step.  
182  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
I - Turn exhaust camshaft in -direction of arrow A- using assem‐  
bly tool -T40266-, and remove camshaft clamp -T40271/1- from  
between teeth of chain sprocket -B-.  
II - Release tension from camshaft in -direction of arrow C- until  
timing chain rests against guide rail -1-. Counterhold camshaft  
in this position, install tensioning rail -2- and tighten bolt -3-.  
Note  
Failure to counterhold the camshaft while the tensioning rail is  
being installed may cause the timing chain to jump!  
– Install chain tensioner -1-, and tighten bolts -arrows-.  
– Install chain tensioner -2-. The retaining clip -arrow- must be  
seated in recess in top section of sump. Tighten bolt -1-, and  
remove locking pin -T40011-.  
3. Chain drive  
183  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Using assembly tool -T40266-, turn inlet camshaft in  
-direction of arrow 1- until camshaft clamp -T40271/2- can  
be removed from between teeth of chain sprocket -2-. Re‐  
lieve tension from camshaft.  
– Remove camshaft clamp -T40271/1- and -T40271/2-.  
– Make sure that adjustment has been carried out correctly:  
chain links with coloured markings -arrows- must be posi‐  
tioned at markings on chain sprockets.  
– Screw in and tighten bolts -arrows-. Specified torque β‡’ Item  
4 (page 143) .  
184  
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02.2021  
– Moisten holes -arrows- with engine oil.  
Note  
If a spring pin -1- is installed, it must be driven back in the event  
that the bearing saddle is re-used. The spring pin must be flush  
with the cylinder head side of the bearing saddle.  
– Fit bearing saddle. Do not tilt bearing saddle, while doing so.  
Screw in bolts -1 to 6- by hand.  
– If a spring pin is installed, it is pulled into the cylinder head  
together with bolt -1-.  
– Remove locking tool -T40267-.  
3. Chain drive  
185  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
– Tighten bolts -arrows- for bearing saddle. Specified torque β‡’  
page 170 .  
– Install timing valves β‡’ Item 7 (page 169) .  
– Turn engine two revolutions in direction of engine rotation.  
Note  
Due to the ratio, the coloured chain links no longer align with  
the markings after the engine has been turned.  
– Remove turning over tool, and install lower timing chain cov‐  
er β‡’ page 164 .  
186  
Rep. gr.15 - Cylinder head, valve gear  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
Note  
Do not tighten bolts -1- and -4- with turning further angle until  
after the vibration damper has been installed. The bolts must be  
unscrewed again for installing the vibration damper.  
– Install vibration damper β‡’ page 88 .  
– Install upper timing chain cover β‡’ page 159 .  
– Install tensioner for poly V-belt β‡’ page 87 .  
– Install poly V-belt β‡’ page 85 .  
Further installation is carried out in reverse order of removal,  
observing the following:  
– After working on the chain drive, adapt learnt values in en‐  
gine control unit. To do this, switch on ignition, and select  
the following menu options on vehicle diagnostic tester:  
0001 - Engine electronics, functions  
0001 - Basic setting  
Timing chain length compensator, reset after renew-  
ing chain  
Specified torques  
♦ β‡’ o3.1 verview - camshaft timing chains”, page 168  
♦ β‡’ o3.3 verview - drive chain for balance shaft”, page 187  
♦ Noise insulation; Assembly overview - noise insulation  
β‡’ General body repairs, exterior; Rep. gr. 66; Noise insula‐  
tion; Assembly overview - noise insulation  
3.3  
Assembly overview - drive chain for  
balance shaft  
Note  
♦ After working on the chain drive, adapt learnt values in en‐  
gine control unit. To do this, switch on ignition, and select  
the following menu options on vehicle diagnostic tester:  
♦ 0001 - Engine electronics, functions  
♦ 0001 - Basic setting  
♦ Timing chain length compensator, reset after re-  
newing chain  
3. Chain drive  
187  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
1 - Guide pin  
❑ 20 Nm  
2 - Tensioning rail  
❑ For timing chain  
3 - Balancer shaft  
❑ Exhaust side  
❑ Must always be re‐  
newed if removed  
❑ Lubricate bearing with  
engine oil  
❑ Renewing β‡’ page 126  
4 - Guide pin  
❑ 20 Nm  
5 - Slide rail  
❑ For timing chain  
6 - Chain tensioner  
❑ 85 Nm  
❑ Insert with locking fluid;  
locking fluid β‡’ Electron‐  
ic parts catalogue (ET‐  
KA)  
7 - Seal  
8 - Cylinder block  
9 - O-ring  
❑ Moisten with engine oil  
10 - Pivot pin  
❑ Lubricate with engine  
oil  
❑ Fitting position β‡’ page  
189  
11 - Intermediate gear  
❑ If bolt β‡’ Item 13 (page 188) has been loosened, idler gear will need to be renewed.  
12 - Thrust washer  
13 - Bolt  
❑ Renew  
❑ If bolt has been loosened, idler gear β‡’ Item 11 (page 188) will need to be renewed  
❑ Tightening sequence β‡’ page 189  
14 - Slide rail  
❑ For balancer shaft timing chain  
15 - Guide pin  
❑ 20 Nm  
16 - Balancer shaft  
❑ Inlet side  
❑ Must always be renewed if removed  
❑ Lubricate bearing with engine oil  
❑ Renewing β‡’ page 123  
17 - Triple chain sprocket  
❑ Fitting position β‡’ page 170  
188  
Rep. gr.15 - Cylinder head, valve gear  
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4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
18 - Drive chain for balance shafts  
❑ Removing and installing β‡’ page 190  
Bearing mounting - installation position  
β€’
β€’
Renew O-ring -1- and lubricate with oil.  
Dowel pin -arrow- for bearing mounting must engage in bore  
in cylinder block.  
β€’
Lubricate bearing mounting.  
Tightening sequence - idler gear  
Note  
♦ The idler gear must always be renewed. Otherwise no tooth  
backlash is set, which may result in damage to the engine.  
♦ The new idler gear is coated with a solid film lubricant that  
wears off after a short period as a result of which the tooth  
backlash is automatically set.  
– With new bolt tighten as follows.  
1.  
2.  
Pre-tighten to 10 Nm using torque wrench.  
Turn idler gear.  
There must be no play in idler gear; otherwise loosen bolt and  
tighten again.  
3.  
4.  
Tighten to 25 Nm using torque wrench.  
Use fixed wrench to turn 90Β° further.  
3. Chain drive  
189  
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02.2021  
3.4  
Removing and installing drive chain for  
balance shaft  
The procedure β€œRemoving and installing drive chain for balance  
shaft” is part of the procedure β€œRemoving and installing cam‐  
shaft timing chain” β‡’ page 171 .  
3.5  
Checking timing chain  
Note  
If complaints (e.g. noise) indicate a stretched camshaft timing  
chain, check timing chain as described below.  
– Remove front part of right wheel housing liner, or remove  
right wheel housing liner β‡’ General body repairs, exterior;  
Rep. gr. 66; Wheel housing liner; Removing and installing  
front wheel housing liner.  
– Remove sealing plug -arrow-. The sealing cap must be re‐  
newed.  
– Turn vibration damper in direction of engine rotation  
until piston of chain tensioner is fully extended in  
-direction of arrow-.  
– Count piston notches that are visible.  
190  
Rep. gr.15 - Cylinder head, valve gear  
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02.2021  
Note  
Visible notches are those located to the right from the chain  
tensioner housing -arrow-.  
♦ If 6 or fewer notches are visible, the camshaft timing chain  
must not be renewed.  
♦ If 7 or more notches are visible, renew camshaft timing chain  
β‡’ page 171 .  
3.6  
Checking valve timing  
Special tools and workshop equipment required  
♦ Dial gauge set, 4-part -VAS 6341-  
♦ Dial gauge adapter -T10170 A-  
– Remove timing chain cover (top) β‡’ page 159 .  
– Remove noise insulation -1- β‡’ General body repairs, exteri‐  
or; Rep. gr. 66; Noise insulation; Assembly overview - noise  
insulation.  
– Remove right wheel and front part of right wheel housing  
liner/entire right wheel housing liner β‡’ General body repairs,  
3. Chain drive  
191  
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02.2021  
exterior; Rep. gr. 66; Wheel housing liner; Removing and  
installing front wheel housing liner.  
– Using 24 mm socket, turn crankshaft via vibration damper  
in direction of engine rotation until markings -1- and -2- are  
almost at top.  
– Remove ignition coil with output stage for cylinder 1 β‡’ page  
580 .  
– Remove spark plug for cylinder 1 using spark plug socket  
and extension -3122 B-.  
– Screw dial gauge adapter -T10170/A- into spark plug hole to  
stop.  
– Insert dial gauge -VAS 6341- with extension -T10170A/1-  
as far as it will go and secure in place with self-locking nut  
-arrow-.  
– Slowly turn crankshaft in engine DOR to maximum needle  
deflection. Once maximum needle deflection is reached (re‐  
verse point of needle), piston is at Β»TDCΒ«.  
Note  
♦ Use a ratchet spanner with a 24 mm socket to turn the  
vibration damper.  
♦ If the crankshaft has been turned beyond β€œTDC” turn engine  
another two revolutions in direction of engine rotation. Do  
not turn engine in opposite direction to normal rotation.  
β€’
Notch on vibration damper must align with arrow marking on  
timing chain cover (bottom) -arrow-.  
192  
Rep. gr.15 - Cylinder head, valve gear  
theMANUALS.org  
Arteon 2018 ➀, Arteon 2021 ➀, Arteon Shooting Brake 2021 ➀, Golf 2013 ➀, Golf 2 ...  
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition  
02.2021  
β€’
The markings -1- on the camshaft chain sprockets must be  
aligned with markings -2- and -3- on cylinder head.  
3. Chain drive  
193  
theMANUALS.org  

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