Having issues with leaking coolant, had the air charge cooler replaced in January but since then the coolant has needed refilled approx every 5 weeks and in the last 5 days twice, it’s been into the local Škoda specialist who’s pressure tested it not signs of a leak and checked the cylinder head gasket. Any ideas on where it’s going. 

One of the EGR coolers is the next port of call providing you are confident of no external leakage

Edited 4 August, 20241 yr by SuperbTWM

Any idea if this is an easy thing to test prior to replacing don’t want to keep throwing money at it without confirmation it’s the issue

Pressurising the individual parts or even the whole cooling system and potentially looking inside with a borescope is probably the way to get a definitive answer. 

It can be tricky as a leak may only be minute until the systems get heat in them. 
 

Has the specialist suggested a way forward?

 

Not sure I know it was pressure tested when cold and also hot and no signs of a leak, i will go back to them and ask had they looked at the egr cooler as a possible issue. 
 

thanks for your help 

Just to confirm, I believe there are 2 EGR coolers on your engine and if one is leaking, they will leak internally so you won't notice externally just by looking under the bonnet or on the floor.

 

 

 

Cheers booked back in for Friday, went out this evening almost two hours after the car was parked up and removed the coolant cap. Let of a fair bit of pressure and the coolant bubbled up not sure that’s a good sign! 

No, this sounds more like head gasket issues! 

 

Did you keep the charge cooler they replaced needlessly? if its good it will be worth selling on.

No didn’t keep it unfortunately, it was full off coolant which is why it was replaced, they tested the head gasket 5 weeks ago and said it was ok 

How much coolant have you put in the car since the charge cooler has been replaced?

Other than the coolant leaking the car is running fine no obvious issues with anything else 

Since it’s been replaced the coolant has been refilled 4-5 times as the warning has came on each time 

Pretty much it’s getting 4/5 weeks before the warning comes on and the coolant needs filled again