Volkswagen Golf Service & Repair Manual: Engine cooling
| Since higher demands are placed on the engine cooling system
when a trailer is being towed, the cooling system is uprated in
conjunction with factory fitted towing attachments if this is a
technical necessity. This is carried out, for example, by
installing a more powerful or second radiator fan and/or larger
radiator. Vehicles with air conditioning and those prepared for
topical climates with air conditioning already have an uprated
engine cooling system. On the Passat, a more powerful radiator
fan (PR no. 0Y2) can also be factory installed as a single fan.
This makes it easier to retrofit a trailer towing system. |
| The cooling system should also be uprated if a towing
attachment is retrofitted and provision for this has not been
made in the factory. If this is not done, overheating of the
cooling system cannot be ruled out if the engine is placed under
high load (gradients, high ambient temperatures, heavy trailer).
During conversion, the parts listed in ETKA (electronic parts
catalogue) must be used for engine cooling in combination with
trailer towing. In addition, the work instructions from the
relevant workshop manuals must be followed. |
| It is only possible to choose not to uprate the cooling
system if assurance can be given that the engine will only be
placed under medium load, e.g. |
| stay well below the gross combination weight |
| high ambient temperatures are unlikely |
| the vehicle is not driven up long, steep gradients |
| no very long journeys are undertaken |
| In any case, the coolant temperature gauge must be observed
carefully. If the needle of the display moves too far into the
hot zone, the speed of the vehicle should be reduced
immediately. In an emergency, it may even be necessary to stop
and allow the engine to cool down. In this instance, the engine
should be allowed to idle for about 2 minutes to avoid any build
up of heat. |
 Note
| On vehicles with air conditioning, cooling of the engine can
be assisted by switching off the air conditioning system. In
this way, there will be an improvement in pulling away and
overtaking. |
| If an except is made in uprating the cooling system (i.e.
uprating has been dispensed with), the new owner must be
informed of this fact when the vehicle is sold. |
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| If the traffic behind the trailer cannot be seen with the
exterior mirrors fitted as standard, additional mirrors are
necessary. Both exterior mirrors must be fitted in this instance
to extension brackets that can be folded in and the mirrors must
be adjusted so that the view to the rear is assured at all
times. |
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General description:
The trailer detector control unit -J345- detects a power
consumption of at least 5 W
→ Remark when “towi ...
Diving or dipping of the rear end between pulling vehicle
and trailer can be avoided with the use of uprated shock
absorbers and coil springs on the rear axle. These ...
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Trailer detector control unit -J345-
Uprated shock absorbers and coil springs