Hello,

Octavia 2 2008 2.0TDi 125kW CR CEGA

The car was pressurizing the water, so I had the head gasket replaced, the head was straightened and pressurized, the exhaust gas cooler was changed, the timing belt kit with water pump (plastic propeller).

The car drove ok for about 2000km until driving on the highway when the water started to boil, I replaced the thermostat (5 pcs in total) and since then it won't open to the large cooling circuit, the upper radiator hose is warm, but the lower one is icy, only after turning off the engine does it start to heat up from the thermostat. If I take out the thermostat and put a cardboard in front of the radiator, everything is completely fine. Yesterday I disconnected the radiator, flushed it, it is passable, I removed the distribution pipes and put a Continental water pump with a larger metal propeller. Still the same, the car boils water in a small circuit and after the water overheats it stops heating, the water boils into the expansion tank..

Edited 25 February25 Feb by Lony

Hi, welcome.

 

Some quick thoughts

• were all the parts correct for you model, year, engine, VIN and fitted correctly
• have you got and checked a full scan tool report - (from a scan tool appropriate to your car with scan tool program fully up to date before readings and car and if appropriate scan tool batteries in a good state of charge)
• have you checked and got any scan tool live data
• have you checked for common problems with 2008 Octavia Mk2 2.0TDi 125kW CR and/or the CEG(A) engine
• was the coolant pressure refilled and coolant level checked after first starting the engine and first drive.

If you don't get any more and better answers from here you could have a look in and/or post in the Octavia Mk2 forums or other forums and threads about the 2.0TDi 125kW CEG(A) engine.

 

You don't say or have on your logo info what country you are in this may make some difference to the car or none at all, I don't know.

 

Skoda Octavia Mk2 (2004 - 2013) forum. - https://www.briskoda.net/forums/forum/28-skoda-octavia-mk2-2004-2013/

 

HTH, good luck.