[williammarq]

The oil cooler (as coloured yellow) are known to fail. Oil presure is upto about 60psi. Water pressure 15psi, hence oil goes to water system. Hope for your sake this is the problem, chnage the oil cooler thne clean/flush out the coolant system - may require a few flushes. Oil should be OK, but for peace of mind an oil change may be worth while.

I already purchased the oil, oil filter, 7l of coolant and the seals for the oil cooler and coolant reservoir directly from the VW dealership.
I'm also going to buy the oil cooler to keep everything new. Not changing the engine oil after such a failure would be a serious mistake hehe

 

[williammarq]

Just make sure when replacing the oil cooler the gasket does not pinch or roll out. It’s a bit of a pain to stand on your head and get to it but it helps to pull the air box and battery tray out to give tons of room to get at it.

I will not do this maintenance on my own. The mechanic is scheduled to do it on the 8th, next Monday. I bought the original VW seals, just the oil cooler that I didn't find original here in my region, I only found a parallel brand called "Ymax", has anyone used this brand?

 

[williammarq]

Hello!
Updating on the case.

The problem was not the oil cooler, but rather a sealing gasket located on the oil filter bracket. Part number 12 on the diagram.

I changed some hoses, oil cooler, seals, water pump, decarbonized the intake, changed the injection nozzles and fuel pump as well.
Everything is perfect now

 

[williammarq]

Thanks for the update, many people do not let us know how that problem was resolved.
This wil be useful to other members who get oil in the water. That gasket/seal is not an immediatly obvious potential culprit.
Great to hear it is all sorted. Simple gasket replacement (bit cheaper then a new oil cooler) but probably just as much labour time. Does not look east oy get at, lots of othe stuff in the way.

Thanks for the update, it helps other memebers with similar problems when you report back how the problem was resolved.
That gasket/seal is not immediatly obvious as a potential cuprit, its a bit hidden away as well, doesn't look easy to get at. I expect most of your bill was labour!

My total cost was R$ 6300.00, around US$ 1277.00 including all the parts that were changed, the inector nozzles I changed to take advantage of the labor since access was easy as a large part was disassembled, just the nozzles cost US$ 330.00

For labor, the mechanic charged US$405.00. Despite everything, I don't think it was such a great value for the entire service considering the value of the parts.