Question about 1998 Volkswagen Jetta
To start with your Volkswagen might only use G12 coolant and the reservoir is the only way to put it in. Now if the car does not start because of low coolant it doesn't surprise me because Dinamalar the owner of Volkswagen and the other German cars used a lot of worthless and senseless sensors and there is no doubt one on the radiator to shut the car down to keep you from cracking or blowing a head gasket. You have to get the sensor reset . I've worked on a lot of Volkswagens and personally I hate them!
Posted on Nov 24, 2013
The low coolant sensor will not keep the car from starting. You need to fill the reservoir. Look on the side of the head by the transmission and you will probably find the coolant flange on the side of the head is leaking. It usually leaks slow enough that the fluid dries on the engine or sits on the transmission. If it is leaking there you'll need to replace the flange and gasket, and any "o" rings for sensors that go in it.
Posted on May 28, 2014
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Posted on Jan 02, 2017
Sometimes, if the leak is small, when car is running and engine hot, you do not get dripping under the car because water is getting vapourized, before dripping down.
Check water level, if water level is going down, then there is either another leak, or the head gasket is going.
When head gasket starts to go , water is vapourized into the engine.
If car overheated after the radiator problem, it is not uncommon that this may had damaged the head gasket, go back to the dealer and complain, as after replacing radiator, the car should had been inspected properly for additional problems.
Posted on Nov 05, 2008
Figuring the car is not overheating because it does it even with the engine cold sounds like a defective level sensor. Like on most VW's inside the reservoir bowl the level sensor is located. First make sure the level of coolant is filled to the maximum line while the vehicle is cold. (not run for a few hours) If that's ok check the density of your coolant. Requires a coolant tester that you can pick up at any automotive store. It should be between -36 and -45 degrees C. (A good mix of coolan and water) Also make sure you use the right coolant. In 98 it should be pinkish red. And get it from the dealer. Do NOT MIX coolants as it could destroy the system. If it is unplug the connector at the level sensor on the bowl and make sure the terminals are not corroded. If they are not before starting he car jump the 2 terminals with a paper clip or wire to fool the cluster into thinking the coolant is full. Be careful not to damage the terminals or spread them. Start the car, the flashing light should not come on. If it doesn't your problem is the level sensor in the bowl. You'll have to replace the bowl to replace the sensor. They're one piece. Not very expensive. You can usually save the coolant in the bowl and reuse it if it's ok by blocking the bottom hose and putting your finger to save what's in the bowl.
Posted on Nov 26, 2008
start the car and add coolant tothe max level and see if that takes care of the problem. when my blinks it tell me when collant is low
Posted on Apr 05, 2009
SOURCE: overheating problem
looks like you have done everything but the problem with your car is that the cylider head gasket has gone have a look at the dipstick or remove the oil filler cap if it looks like mayo then 100% head gasket has failed you said no water on the floor so it must have gone into engine only way this can happen is head gasket failing, if you have put lot of water in to the cooling system then your sump will be full of oil water mix.
let us know your findings so we can help you more if you need it
Posted on Apr 22, 2009
if you added back the fluid you lost it e=will run out becuse thermostat aint o pen yet try again let motor warm up then cgk fluid
Posted on Oct 09, 2009
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