There is no radiator cap on a 98 vw passat. You should have a pressurized system. You may have an air bubble. The tool to pressurize it is $140 and the thermostat, if its stickin is only $15. Go figure. Plus you don't want the pleasure of doing it yourself. It's an 8 hour job. Good luck! Trade it in
This would be easier to answer if you said what you call top speed and whether you were driving in the winter or summer, and how often you drive at top speed. At top speed, the load on the engine is much higher so the temperature will go up some, but not necessarily overheat. Coming back to normal speeds would bring the temp back to normal. This is typical with most cars. Check you antifreeze strength and level, if they are good then there isnt a problem.
If your 1997 Passat dies sometimes, you might have an issue with the alternator not charging the battery. You could also have a problem with the distributor or the coil.
It could be caused by a cavity you might want to go to the dentist and the problem continues.
Coolant temp sensor. There is an extended warranty on them. It could also be the thermostat but that should have been changed with your water pump.
You could go in store or online to Euro Car Parts to view car parts for the Volkswagen Passat. You could also go on eBay to buy car parts for the Volkswagen Passat for a potentially cheaper price.
increase by as much as 11°C.
...be too hot for human life.
A bad coolant temperature sensor is one thing that could cause an idling speed problem with a Peugeot 406. There could also be a problem with the idle control valve.
That definition means that for some reason the PCM is seeing a low input from the ECT sensor. That could be sensor problem, a wiring problem, or a PCM problem, but the most likely problem is that the truck is actually running too cold. That could be a stuck open thermostat, or an incorrect temperature thermostat installed.
switch it off....?
coolant tempure sensor,thermastat
It is possible that the problem you are experiencing with your 1999 Volkswagen Passat is caused by a fault in the vehicle's headlight switch. The headlight switch controls the operation of the tail lights, as well as the head lights, and a malfunction in the switch can cause the tail lights to only function when the high beams are on. It is also possible that the issue could be caused by a problem with the wiring in the vehicle, such as a loose connection or a short circuit. I recommend having a mechanic diagnose and repair the problem, as it could be a safety issue if your tail lights are not functioning properly. The mechanic will be able to determine the cause of the problem and repair it for you.
Could be because of overheating - some motherboards have cutoffs when it reaches a certain temperature Simply adding an extra fan could solve the problem Could be because of overheating - some motherboards have cutoffs when it reaches a certain temperature Simply adding an extra fan could solve the problem