Hello once again! 

 

My lovely, aging Octy is sick again. It has an oil leak. After some investigation, it looks like it comes from the oil cooler. More specific, from the upper side of it, where it is joint with the engine block. I hope it's a sealing failure and not the cooler itself. That's why I need a parts schematic. 

Of course, any inputs will be helpful and welcomed! 

 

Octavia 1.6l SR - AVU 

You don't say what model year your car is but the page of engine diagrams for a 2004 1U Octy are HERE, although the AVU engine block is not marked as such.  I think it could be THIS one.  The oil pump diagram is HERE, although it doesn't show any gaskets - maybe they're listed elsewhere.

Sorry! It's a 2001 Elegance. 

 

Non of the above diagrams show the oil cooler. 

 

According to this video, it's straight forward to replace the cooler. But, I have to find out if there is any more gaskets above the cooler, between it's base and the engine block. There is a sensor above the cooler, too (oil pressure sensor?) that is also a suspect of leaking. 

 

Thankfully, all the leakage is outwards, so no oil in cooling system neither water in oil. 

Car Parts Catalog - LLLParts This page should have the answers.

 

How many wires go to the sensor? 1 or 2?

 

Edited 16 July, 20241 yr by Breezy_Pete

Thank you, Pete! 

 

It's a single wire sensor. 

Probably a pressure switch then. When they start to fail, they often leak oil out through the electrical connection.

The connection is dry. Unfortunately, I can't see the body or the sealing except a very small part of it. The secondary air pump and a lot of cables and hoses are hiding the area. That's why I asked about a diagram. To see what I have to face before I decide to remove parts! 

On 16/07/2024 at 14:02, Breezy_Pete said:

Probably a pressure switch then. When they start to fail, they often leak oil out through the electrical connection.

Hi Pete, I'm looking around the forum trying to get info. I have a 2017 2.0 tdi superb and just recently noticed oil in coolant reservoir tank. Doesn't appear to be water in oil, car seems to run fine.

Only reason I checked was I could hear water noise while in the driver seat.

Any suggestions or advice would be very welcome! 👍

Oil in coolant generally means oil cooler failure.

1 hour ago, Breezy_Pete said:

Oil in coolant generally means oil cooler failure.

Ok thanks will find out tomorrow for sure