Table of Contents > Descriptions of work > Poly V-belt: checking condition

VW Tiguan 2021 Service Maintenance Manual ➜ Poly V-belt: checking condition

Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤  
Maintenance - Edition 12.2020  
Interior and exterior body: inspecting  
for corrosion with doors and flaps open  
Test locations  
♦ Sliding sunroof frame  
♦ Inner and outer door frame  
♦ Area around trim strips  
♦ Windscreen roof edge  
♦ Outer and inner A-pillar  
♦ Inner and outer bonnet  
♦ Wheel arches  
♦ Inner and outer tailgate  
Poly V-belt: renewing  
⇒ Rep. gr. 13; Cylinder block belt pulley end; Removing and  
installing poly V-belt  
Poly V-belt: checking condition  
– Crank engine at vibration damper on pulley using a socket.  
Check poly V-belt -1- for:  
4. Descriptions of work  
Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤  
Maintenance - Edition 12.2020  
♦ Sub-surface cracks (cracks, core ruptures, cross-sectional  
♦ Layer separation (top layer, cord strands)  
♦ Base disruption  
♦ Frayed cord strands  
♦ Flank wear (material wear, frayed flanks, flank brittleness  
-glassy flanks-, surface cracks)  
If faults are found, it is absolutely necessary to renew the  
poly V-belt.  
In the case of diesel engines, toothed belts which came  
into contact with oil, brake fluid, fuel or reducing agent,  
must always be renewed.  
In the case of petrol engines, toothed belts which came in‐  
to contact with oil, brake fluid, fuel or coolant, must always  
be renewed.  
This can avoid breakdowns and malfunctions.  
The replacement of a poly V-belt is a repair measure.  
4. Descriptions of work  
Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤  
Maintenance - Edition 12.2020  
Cooling system: checking frost protec‐  
tion and coolant level  
The water used for mixing has a major influence on the ef‐  
fectiveness of the coolant. Because the water quality differs  
from country to country and even from region to region, the  
quality of the water to be used in the cooling system has  
been specified by Volkswagen. Distilled water satisfies all  
requirements. Therefore, only ever use distilled water when  
mixing coolant for topping up or renewing coolant.  
Use only coolant additives which conform with the ⇒ Elec‐  
tronic parts catalogue (ETKA). Other coolant additives may  
reduce corrosion protection substantially. The resulting dam‐  
age could lead to loss of coolant and subsequent severe  
damage to the engine.  
Mixed in the proper proportions, coolant inhibits frost and  
corrosion damage as well as scaling. Additives also raise the  
boiling point of the coolant. Therefore, the cooling system  
must be filled all year round with a coolant additive.  
Because of its high boiling point, the coolant improves en‐  
gine reliability under heavy loads, particularly in countries  
with tropical climates.  
The refractometer -T10007A- or refractometer -T10007B-  
must be used to determine the current anti-freeze value.  
Scale -1- of the refractometer is calibrated for the coolant  
additives G12++ and G12evo.  
Scale -2- of the refractometer is calibrated for the coolant  
additive G13.  
If it is not possible to ensure that the same type of coolant  
additive is filled: always determine anti-freeze protection us‐  
ing the scale for G13.  
Frost protection must be guaranteed down to -25°C as a  
minimum and, in countries with arctic conditions, down to  
approx. -36°C. Increasing the frost protection is permissible  
only if climatic conditions require stronger frost protection. It  
may, however, be increased only to a maximum of -48°C.  
Otherwise, the cooling effect will be impaired.  
4. Descriptions of work  

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