BreeScooby

Thanks for all the pointers, this forum + HatBoyHarvey's videos on Youtube have helped me fix a lot of issues and keep this old but relatively low mileage car going

Quick update: I tested the sensor with an oscilliscope and it output a square wave so I assumed it's working. I took the car to a garage who diagnosed the water pump impeller wasn't spinning. They replaced the water pump for around £200. I've only taken the car for a brief test drive but it doesn't appear to be overheating anymore and once up to temperature the water flow in the expansion tank looks much more even and stronger flow. The engine management light has also disappeared (perhaps related to the water pump being driven by the cam belt) but I'm not sure the fault code has gone and I did notice 3 beeps when starting the engine so will continue to monitor it. I consider this a lucky outcome given what happened

I should say ignition coils, I don't have a long enough socket to reach the spark plugs. I can try to test the sensor with an oscilloscope but it's going to be a pain to set up

Also pulled the sensor and between the 3 terminals read OL or high megaohms, which suggest to me it's failed. With the ignition on the connector gets 5V on 2 pins, 3rd one appears to be ground/0V.

Pulled the spark plug covers and while there's some old crusty white corrosion, nothing abnormal for them being 20 years old.

Another issue, not sure if it's related, noticed the engine management light has come on. Pulled over and car takes longer to start. Connected an OBD reader and fault code P0342: Camshaft position sensor A circuit low bank 1 or single sensor. Going to check the electrical connections and measure the sensor if I can.

After replacing the coolant I ran it with the cap off until it was warm to let out any air, it kept overflowing out the top of the expansion tank until turned off. I was wrong before, the car is still overheating, it didn't over heat when the cap was slightly loose and was overflowing. This started after using the radiator sealant but I haven't ruled out the head gasket yet. One of the first steps I took was replacing the expansion tank & cap but I'm tempted to put back the original to rule out the replica stuff being bad.

So, an update: As I knew the radiator was leaking and since I had to use the car to commute to/from work, being unable to stand topping up coolant with 1 litre of water every trip, I decided to use some old Barr's Leak which was lay around in the garage. This, of course, was a mistake and while it blocked the leak it also blocked the rest of the cooling system up and caused the car to overheat in short journeys. I've since flushed the system a few times, replaced the radiator and the car doesn't seem to be overheating at present and the interior heating is working again. Attached a photo of the old radiator which has a lot of old coolant and other junk (including the Barr's leak) around it. The new radiator wasn't a good fit but it works. However the coolant is overflowing from the expansion cap. After giving it a run around I noticed the coolant will pool up in the expansion tank, drain rapidly and then gurgle through the pipes which suggests to me it's either still partially blocked or the head gasket is done. When I did an earlier flush I noticed the exhaust sputtering fluid but also noticed a potential crack in the exhaust. I'm thinking of giving it another flush with Irontite Thoro-flush unless someone can suggest a cheaper/better alternative?

Thanks, I'm preparing to do it within the next few weeks. Putting together a list of parts for the 'while you're in there' jobs: Radiator O-ring Seals Coolant thermostat Heat temperature sender connector Coolant temperature sensor for SKODA Fabia I Hatchback (6Y2) Thermoswitch? Can anyone assist with part numbers for the above?

Had another look today and appears that the major leak is coming from the bottom of the radiator towards the drivers side, so that should be a fun 5+ hours replacement job. Aircon has been working ok, I suspect the photos above are a red herring/separate issue. I believe it's a 6Y2 1.2L petrol

Forgot to add, the leak only seems to manifest when the car is running.

Hi all, Another coolant leak thread.. The car was gifted to me and has a low mileage (65k). I'm keen to fix it but hoping to DIY as garage costs may outweigh the car value. Car always had a slow coolant leak (top up every couple weeks) and as such was more water than coolant. After the recent cold spell the coolant had seemingly frozen and leak has become much worse since then, losing around 1 litre in a short journey. I've replaced the expansion tank and cap as it was cheap and easy to rule out. I can see coolant leaking from the front undertray, drivers side near the radiator. I've attached some photos where I spotted a leak some months ago, I suspect these connect to the intercooler? Since the leak seems to run down the pipes I'm having difficulty identifying where it's coming from. Any pointers/help appreciated, thanks