okay well that isnt good that there are no visible leaks , but not the end of the world. Remember head gasket leak is worst case .. you could still be leaking some place and dripping on to the exhaust.
There are a few other things you could try but they will require tools. I will list them and you can decide for yourself the path forward.
1. Put a pressure guage on the coolant tank and run the engine .. if you see it " spiking " while the engin eis running your head gasket is toast as you are pressurizin through the head gasket.
2. Pressurize the coolant system through the reservoir to about 12 or 13 lbs and look for visible leaks in the system. There are a ton of coolant lines on this car so look carefully.
especialy around water pump , thermostat, reservoir and pipes running across the front at the bottom.
3. Watch for white smoke as that is what shows if you burn coolant and try and smell the exhaust . if that sweet smell is actually coming from the exhaust , that does not bode well.
4. Remove the spartk plugs and inspect. if you find any strangely clean you are steam cleaning them with coolant . Again a very bad sign. may as well check though . You may find all are normal but one and maybe a neighbouring cylinder are clean plugs . There is your leak.
5. look for oil film in your coolant .
6. Look for intermixed coolant in your oil creating a froth . This however is unlikely at your small amount going in.
7. Your coolant should be Pink .. look for Pink crusting at all the fittings.
8. Make sure your heater core isnt leaking , check the floor for damp carpet while running the heater on high .. if you smell it with the heater on high and the heater valve open you likely have a bad core ... at least you can bypass it to get through the summer ..
Good Luck and report back
BTW keep topping up coolant while cold .. to give you an idea of how fast it is going down.
2000 A6 2.8 Q
1978 911SC Targa
2014 Nissan Murano ( uninspiring crap company car )
1976 Yamaha XS 360.
Last edited by Airbag; 05-23-2014 at 12:12 PM.