joel bint

Hi Zaheed, i ended up draining and replacing the expansion tank, to no avail. i also took the car to get stripped down to identify if it was a head gasket leak, no luck on that end (good that it was not HG tho). so by process of elimination i figured it was the heater matrix, blocked or broken. i ended up selling the car before i got the part changed. it was weird, i had instances of coolant being a visual leak coming out of my car, to coolant literally disappearing. i would definitely just recommend just spending the money or the time to properly diagnose the issue, i managed to sell mine with the problem still happening so i have no idea if it got fixed or can get worse. i had mine for a year with the problem and had no further mechanical faults with the car relating to coolant leakage so i would definitely make sure you keep an eye on it, also changing the expansion tank (getting rid of the Silica bag in the tank if you have one). make sure you keep some coolant in your boot aswell, buy the correct coolant for the car too as it usually lasted longer for me. apologies i cant be much help

quick update, A new Cap arrived, only put it on last night so hopefully I see an improvement. bit of good and bad news, The heat is back in the cabin, though it takes a very long while to warm up. However, I am now getting a clicking and popping sound, like it is coming from the dashboard. I have no idea what this could be, but when the clicking stops, I usually have a coolant loss indicator on my dash.

My apologies, I meant the drain bolt. waiting on a new reservoir Cap, before I do anything else, I just thought it may be worth it to do a coolant flush to make sure there is not any air in the system

We are waiting on a new cap, which has not yet been delivered. So, as of yet, there is no update on the diagnosis.

is this an expensive job? changing the thermostat

i have ordered a new reservoir and cap, Do you know how I can change it over while doing a coolant flush? i have no idea where the radiator cap is to drain the coolant

hi Gareth, that is exactly what happens, the temp does not fluctuate at all

Hi all, I have a 2014 Audi A3 8V 2.0 tdi (97k miles) for around a year now I have had a pretty persistent Coolant leak in my car. I have never been able to track down the route of the problem. I have to refill my coolant around every 10 days as it quite literally disappears. I have taken it to multiple garages and even they couldn't find the problem, as all garages do, they quote you the most expensive job, replacing the head gasket (£900 just to strip the engine!) so I gave up with them. no internal leak, to residue within any part of the oil so I self-diagnosed that the head gasket was not the problem. the other day while driving i noticed my radiator kicked in, i decided to pull over, and to my surprise, I finally saw a puddle of coolant coming out from the actual reservoir. I don't think anyone would ever be happy to see a coolant leak, but I was buzzing. 😄 cut long story short, i still cannot identify where or what the problem is. I have total coolant loss, a burning smell coming from the tank itself, no heat in my cabin, and back pressure in the system. My only thought is a blocked heater matrix but I know that is a labour-intensive job. i want to bleed my coolant system and flush my heater matrix to help me get to the problem. could someone be able to help me as i don't have much experience with cars and would like any insight on what it could be? Also, I would like to know how I flush my coolant system. thanks in advance