Join Date: Feb 2013
Location: Aussie in Sweden
Coolant Leak Test?
So I just got back from overseas and opened my bonnet to check the oil and coolant levels before I took her out for a journey and noticed that the coolant leaked whilst I was away (from Max -> Min over the 10 weeks I was away, so its not pouring out. And yes it was driven by my brother whilst I was away).
The weird thing though? Its sprayed all over the engine bay around the thermostat and on the surrounding hoses. I suspected before I left that one of my hoses may be poorly connected or the temp sensor wasn't secured enough and as such, when the coolant started flowing a very small amount was spraying out under the pressure, however I was unable to find the source of the leak and it was so small that it never really bothered me.
However now that I am back and my engine bay looks like someone bled all over the place (red coolant) I want to finally get round to finding the leak and resolving the issue once and for all (along with an engine bay clean up).
So my question is, how do I find the source of the leak? I have tried getting the car up to temp then leaving it on the drive with the engine running (its 38*C outside) with the bonnet open in the hope that I can see where its coming from. However this hasn't been very fruitful for me. Therefore, is there another way I can pressure test the system without paying a garage or having to buy expensive equipment?
FYI the radiator is 100% with no leaks or any evidence of leaks anywhere to be found. Thankfully the weather here is very kind to rads and its in tip-top shape. So its definitely a hose connection or the temp sensor or maybe even the thermostat itself (which was replaced about 6 months ago).
Any help would be appreciated in helping me find the culprit!
2000 Alfa 156 Sportwagon 2.0 TS CF3
2002 Alfa GTV 2.0 TS CF3
1983 Porsche 944