How does the cooling system work on a VW Jetta?

How does the cooling system work on a VW Jetta?

Your Jetta’s cooling system works by cycling the engine coolant from the engine through the radiator. The water pump pushes the water through the entire system. The thermostat opens up once the engine reaches operating temperature and allows coolant in. If any part of this system fails, your Jetta will eventually overheat.

What happens if you overheat a VW Jetta?

Overheating can cause a lot of expensive damage to the engine. A blow head gasket or a cracked head/block are much more expensive to repair than a thermostat or water pump. Your Jetta’s cooling system works by cycling the engine coolant from the engine through the radiator. The water pump pushes the water through the entire system.

Why is my VW Passat TDI leaking coolant?

I have 2012 VW Passat TDI. There are 4700 miles on it. I do not have the warranty on the car, as it was purchased at an auction. Problem is: The car has been loosing coolant since I’ve had it. I need to refill the coolant container every 30 miles or so because the light for “add coolant” goes on.

What causes a Volkswagen Jetta head gasket to blow?

If your Jetta’s engine gets hot enough, the coolant will begin to boil over and manifest itself as steam coming up from under the hood. It does this to relieve the pressure on the cooling system before lasting damage can be done to it. 3. Blown Head Gasket

What does p0118 mean on a VW Jetta?

P0118 is a common OBDII trouble code. It is a general code, which means that it’s going to have the same meaning for the Volkswagen Jetta as it would any other vehicle. This code is thrown when the resistance coming from the coolant temp sensor does not change as the vehicle warms up. Volkswagen Jetta P0118 Symptoms.

What happens if your coolant temperature sensor goes bad?

Fuel delivery, ignition timing and engine performance are among the key elements affected by the information the coolant temperature sensor gathers. If it goes bad, it can cause several problems. Signs Your Engine Coolant Temperature (ECT) Sensor Is Bad

What kind of drill do I need for Jetta thermostat?

A 3/8 drive 13mm or 1/2in deep well socket (and ratchet), 10mm deep well, 5/16 standard, 5/8 open end, 5/32 drill bit (or something similar in diameter), 5mm Allen wrench, large slotted screwdriver and a basin to catch anti-freeze. Loading…

Why is my car overheating after replacing the thermostat?

A clog in the heater core could also cause this problem. However, if the car is still getting heat, the heater core can easily be ruled out. The most likely cause is a clogged radiator. I would recommend that you have a certified technician complete a system check in order to pinpoint your overheating problem. Was this answer helpful?

Why is the radiator fan not working on a Volkswagen Jetta?

If your Jetta has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies.

Why is the coolant leaking from my VW Jetta?

See all problems of the 2000 Volkswagen Jetta . : the contact stated the vehicle coolant leaked into the electrical wiring harness. An independent repair shop performed a diagnostic test, but no failure codes displayed. Upon further inspection, the mechanic determined there was a coolant migration problem.

Why does my VW Jetta keep stalling?

The stalling occurs shortly after starting the cold engine. This stalling has occurred while in traffic resulting in a serious safety concern. It appears that this issue is experienced by a number of 2012 Jetta sportwagen owners.

What are the problems with a 2004 VW Jetta?

1 Failed Transmission 2004 Jetta Average Cost to Fix: $2,400 Average Mileage: 77,000 mi 2 Engine Failure 2004 Jetta Average Cost to Fix: $1,400 Average Mileage: 96,000 mi 3 Oil Sludge In Engine 2004 Jetta

What are the symptoms of a Volkswagen Jetta overheating?

If your Jetta is run for too long of a period while overheating, the head gasket may blow. Bad head gasket symptoms include white smoke coming from the tail pipe, rough idle, and oil in the coolant. Shutting down before it overheats, or as soon as you see that it is overheating will usually prevent this from happening.

What should I do if my coolant level sensor is full?

Check the coolant temperature sensor, and the coolant level sensor and make sure that they are plugged in. Remove the harness to them and check the sensor for resistance. For the level sensor, if the coolant is full, there should be no resistance as the sensor is in a closed loop.

Why is the radiator not working on my VW Jetta?

If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Jetta is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.

What are the problems with a 2003 VW Jetta?

The main Volkswagen Jetta problems in the 2003 model include the factory water pump breaking, the car overheating, the check engine light coming on, and the coolant leaking through the system. The typical repair cost comes to around $350, with the most common solution being to replace the water pump at around 55,000 miles.

What should the water temp be in a Jetta?

The car in question is the Jetta in my sig. I’ve been watching my Scangauge recently and the water temp reading goes up to 227 F in city traffic. I was wondering if this isn’t a tad high. The temp needle, however, does not budge from 190 F, which should mean that all is well (assuming properly functioning sensors).

Where do I find the coolant temp in my car?

Measure the coolant temperature at the oil heat exchanger wich is the regulated portion of the cooling system. You can also measure the temperature of the coolant going from the head to the heater core. This is the primary cooling circuit which is regulated to 190F and has constant flow thru the engine.