Coolant light flashing

**BubbaNaAudi** · 01-20-2009 06:31 AM

Ok I have a 97 A4 1.8T and we just put a head on the car and did all the other junk while we were in there. Oh yeah I just got this car and it was sitting for a year or more. We went to run the car the first night we put it back together and it would run hot so we thought thermostat so I got one. Well I was gonna change that last night and seen it was low on coolant again so I pulled the upper hose and no coolant came out. So I put more coolant in got it full again and ran it some more and no more running hot. I let the car run for about 30 minutes never ran hot. Now for my problem the coolant light flashes now after it runs for about a minute. I know it is full of coolant and there are no leaks. What could my problem be? I really wanna get this car running since I sold my Jetta and I miss driving a euro.

**lotusgardener** · 01-20-2009 06:46 AM

Check the coolant sensor on the bottom of the reservoir... Hopefully its as simple as that.

**BubbaNaAudi** · 01-20-2009 07:02 AM

Ok I will check that but if that was bad wouldn't the light come on as soon as I start the car?

**obijohn22** · 01-20-2009 07:56 AM

Have you checked for codes?

**BubbaNaAudi** · 01-20-2009 08:01 AM

I don't have a vag I do have a Matco scanner. Will it throw a engine code for a coolant light?

**slopoke** · 01-20-2009 08:21 AM

could also be something as stupid as air air pocket in the system

**obijohn22** · 01-20-2009 04:58 PM

there is a bleeder screw on the top front of the engine by the intake mani on the drivers side of the throttle body. You can let out any air there. And i am not sure about the coolant sensor throwing a code. I have never had that problem, I would assume that it does throw a code though. keep us posted.

**haus4** · 01-20-2009 05:07 PM

Hopefully you just have to bleed it, or a worst case would be your water pump is shot and is not pumping any anti freeze.

**BubbaNaAudi** · 01-21-2009 05:56 AM

Ok the plug on the bottom of the bottle was not plugged up all the way just sitting there. I just happened to look I posted this in the S4 section sorry guys. Thanks for everybody's help. I think I might have to replace the fan clutch now cars wants to go alittle above the half way mark when driving but the oil temp stays around 160 170.