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Which engine, V6 or 1.8T?
In a 2002 Volkswagen Passat the 2.8 litre V6 engine has a timing BELT
If you have a 1999 Passat V6, the coolant temperature sensor is located in the lower radiator hose.
The 2002 Volkswagen Passat GLX is not recommended for towing. However, the maximum payload capacity of this vehicle is 1,074 pounds.
On a V6 it's in the passenger side bottom behind the alternator.
The thread on cap for your engine coolant reservoir is the pressure cap / radiator cap ( the engine coolant reservoir is located on the drivers side of the engine compartment , near the firewall )
On the 3.3L V6 it is under the radiator cap.
According to one of Fords websites : For a 1994 Mercury Villager , 3.0 liter V6 : The radiator cap is ( 13 PSI )
On a 2003 Ford Ranger : Since you are asking this question I assume you have the 2.3L Dual Over Head Cam four cylinder engine . In this case the thread on cap on the engine coolant reservoir is your pressure cap / radiator cap The 3.0L and 4.0L V6 engines have the radiator cap on top of the radiator
http://www.globalautoshop.com/accessories/automotive/volkswagen_index.htm
Look on the radiator cap - there should be a psi rating stamped on there.
The thermostat on a 3.7L V6 is under the housing where the lower radiator hose attaches to the engine.