Coolant leak but no visual signs anywhere !!! please help

[hullstorage]

We have a 2019 VOLKSWAGEN CRAFTER CR35 STARTLINE TDI

We have noticed over the past couple of months noticed the coolant being used at a rate of about a tank a day !

I have left engine running inside warehouse and overnight etc but no visable leaks anywhere so i have not got it in garage and again he cannot find any leaks also?

There is no water on oil dipstick or in the expansion tank either.

Anybody else had this ?

Thanks

 

[TonyL]

Have you done all the usual checks e.g. pressure test, check for combustion gases in coolant. If you are losing that much coolant and there no sign of a leak then it may well be finding its way into the combustion chambers.

Do you see any steam from the exhaust?

 

[Jack T]

Not on a Crafter but on other VAG 2.0 tdi’s I have had the same problem/symptoms. It was the EGR cooler that had failed and the coolant was being boiled/evaporated away meaning no sign of a leak.

Might be worth a look.

 

[airhoguk]

EGR leaking coolant is a known issue. Need to get it sorted as it can cause the engine to hydro lock

 

[Raul a/3]

Yep, egr cooler is leaking, disappearing coolant without a trace, and coolant system tested under pressure with no leaks.
I had mine done myself couple of years ago

 

[AJCConversions]

I’ve sorted two of these now and both were the EGR cooler GASKET. The cooler itself has been fine but the gasket had failed. These can be bought for £40 off eBay