Coolant level always low
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Maybe you should learn what a coolant TEMPERATURE sensor does, then learn what a coolant LEVEL sensor does.
Directing someone to a video about changing a TEMPERATURE sensor is just wasting that persons time. If I see someone bought the wrong part for their problem I'm not giving them instructions on how to change the wrong part. In fact you did say you think he has a bad TEMPERATURE sensor.
Go read your FSM and talk to your mechanic before giving bad advice.
Directing someone to a video about changing a TEMPERATURE sensor is just wasting that persons time. If I see someone bought the wrong part for their problem I'm not giving them instructions on how to change the wrong part. In fact you did say you think he has a bad TEMPERATURE sensor.
Go read your FSM and talk to your mechanic before giving bad advice.
Racer
Joined: Dec 2007
Posts: 416
Likes: 3
Drifting
Joined: Feb 2008
Posts: 1,537
Likes: 178
From: NE Ohio
2024 C4 of the Year Finalist - Unmodified
Meanwhile back to the problem. A low coolant light shows that there is air in the radiator where the cap is. If an air pocket forms in the radiator by the cap you have air there at the low coolant sensor. That sensor creates a ground in the water. Water low or air pocket will break ground. Check your seal on the radiator cap. A small tear crack etc will cause air to enter the radiator on recycle. No coolant loss, no overheat and light will come and go. I had a new cap on mine and felt that was not the problem until I found a small tear in the gasket. Two years now no low coolant light. That sensor is nothing but a port through the radiator to the coolant for ground. Start your vette and when the light is off pull the connector and the light will come on (you broke ground ). Then you know it is working. You may have to drive it up to five times for the air pocket to remove itself through recycle.
Melting Slicks
Joined: Aug 2008
Posts: 2,082
Likes: 50
From: Palmdale CA
89 l98
Took off my TB to clean it and now it seems I have to keep adding coolant. Seems like I have added more than it should even hold total. I gave replace cap, added coolant to radiator directly and to recovery tank. After it cools down Radiator is low and recovery tank empty. Can find no leaks. I think I must have air block but don't know how to fix it
Took off my TB to clean it and now it seems I have to keep adding coolant. Seems like I have added more than it should even hold total. I gave replace cap, added coolant to radiator directly and to recovery tank. After it cools down Radiator is low and recovery tank empty. Can find no leaks. I think I must have air block but don't know how to fix it
Keep in mind that if the leak occurs when the system is Pressurized and Hot, Coolant/water might escape in the form of steam, and not necessarily cause a puddle. I personally would have installed fresh hose's, unless of course they were fairly new to begin with..
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
Problem fixed
Small leak under pressure where inlet line connects to bottom of TB
One of the prongs on low level coolant sensor was broken off. It must have been just loose enough to give false reading when driving aggressively
As always thanks to all for input.
I hope to gain enough knowledge to help others one of these days
Mike
Small leak under pressure where inlet line connects to bottom of TB
One of the prongs on low level coolant sensor was broken off. It must have been just loose enough to give false reading when driving aggressively
As always thanks to all for input.
I hope to gain enough knowledge to help others one of these days
Mike
