FraserJ70 Posted May 31, 2021 Share Posted May 31, 2021 Hi , I replaced the expansion tank on my ford focus 1.6tdi 2008 as the thread where you put the cap on was damaged, so after replacing the tank i then filled it back up with new coolant , so far so good. I then took for a drive for a couple of miles and checked the the coolant level and the coolant and mysteriously disappeared , I opened the cap and the coolant came flooding back into the expansion tank but everytime I drive the car now the coolant disappears. Please don't tell me its the head gasket, I'm hoping it's a quick fix any advice Regards Fraser Quote Link to comment Share on other sites More sharing options...
Luke4efc Posted May 31, 2021 Share Posted May 31, 2021 If the coolant isn't burning off and comes back into the tank when you switch the engine off, then it cannot really be a headgasket failure. I'm guessing you now have an air lock you need to bleed. Quote Link to comment Share on other sites More sharing options...
FraserJ70 Posted June 1, 2021 Author Share Posted June 1, 2021 Bleed all the coolant out and put new coolant in , is that what you mean ? Quote Link to comment Share on other sites More sharing options...
unofix Posted June 1, 2021 Share Posted June 1, 2021 With the engine cold, take the top off the expansion tank and fill it to the "Max" line. Leave the cap off the tank and start the engine, let it reach normal operating temprature and idle for a few more minuites. Switch off and let things cool down and refill tank back to the Max line and replace the cap. It can take a few days for all air to work itself out of the system, just keep an eye on the coolant level. Don't overfil it and only top it back up to the Max line when cold. Quote Link to comment Share on other sites More sharing options...
FraserJ70 Posted June 1, 2021 Author Share Posted June 1, 2021 I'll try that , thanks for your reply 👍👍 Quote Link to comment Share on other sites More sharing options...
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