Hi is it possible for my oil filter houseing to let coolant into my oil? I have a sanwich plate for oil cooler. Is there a seal that can be replaced?

More likely for that to leak oil into coolant, as oil pressure is higher than coolant pressure nearly all the time; except when just switched off at operating temperature.

Oh right, my coolant colour seems normal, the otherday i took off my rocker cover and i saw coolant on top of one of my headbolts. I have no loss of power and useing tinyest bit of coolant every couple of weeks

Are you sure it was coolant in there not just condensed water?

The radiator thermoswitch is a popular spot for slow coolant leaks.

100% was coolant the same pink coulour. I can check that, could that make it go into oil

1 hour ago, Jake101 said:

can check that, could that make it go into oil

Nope

On 08/05/2021 at 13:36, Wino said:

More likely for that to leak oil into coolant, as oil pressure is higher than coolant pressure nearly all the time; except when just switched off at operating temperature.

Would that be possible if there is no compromised areas around the gasket oil holes? Surely it has to be compromised between a coolant channel and the cylinder for pressure to get to the coolant? Lookimg for all the ways coolant can become pressurised is the way I have it in my mind. I wonder what other members are thinking about this? I try to visualise as best I can.

5 minutes ago, OctaviaVRS2 said:

Would that be possible if there is no compromised areas around the gasket oil holes? Surely it has to be compromised between a coolant channel and the cylinder for pressure to get to the coolant? Lookimg for all the ways coolant can become pressurised is the way I have it in my mind. I wonder what other members are thinking about this? I try to visualise as best I can.

The OP was asking about coolant getting into his oil and wondering if it was via his oil cooler, my answer was referring to what typically happens if an oil cooler develops a leak.

 

You seem to be interested in over-pressurised coolant, which isn't the same scenario?

For coolant to be overpressurised it's either overheating, or combustion gases are getting in somewhere, via fire-rings of the HG, crack in head, EGR cooler leak etc.

 

 

Thanks for clarifying. I found the post by landed on it from a search so I guess the search connected me by terns like 'pressure'. I have to try to refine my searches better.

2 minutes ago, OctaviaVRS2 said:

Thanks for clarifying. I found the post by landed on it from a search so I guess the search connected me by terns like 'pressure'. I have to try to refine my searches better.

 

I just replied to you in another thread, please can you start a new thread and we can draw all this together instead of splattering it across a bunch of threads.

Sorry about that. I'm not experienced at forums. The topics seem to be all over the place. A huge long list. Nothing is categorised into areas of interest, so I go down a massive list looking fior things that sound like they are about what I'm interested in until I am falling asleep and still don't find the entry point. Some places say don't keep starting new threads, others say start new thread. Thanks for your guidance already. I think I found I had two coolant tank pressure caps that were faulty. They were both new and both from Skoda. I reverted to my original pressure cap, which I only replaced because I was trying to eliminate an issue and it was the cheapest starting point. So, with my original pressure cap on, coolant doesn't over pressurise, hoses don't go hard and there's not loads of pressure in it if I open it the next day to have a look. It seems to me that the two suspect pressure caps were simply not releasing pressure until it was major. I can only drive and see. I drove 15 miles this evening, ten of which were vigorous and not a problem. I am suspicious my parking heater pump is not rotating and that is also not helping the movement of water. Also on the suspect caps the pressure increase seems to stop water moving around adequately. Soon as I can afford, it is causes more problems I'll get a pressure test done. One thing that helped quite a lot was to raise the water level very much higher than the engine. I got a lot of air out. Now the coolant doesn't go up and down so much.

Very few in this subforum will have any knowledge or experience of a 2.0tdi vRS Octavia mk2. You really will be better off starting your own thread in here: Skoda Octavia Mk II (2004 - 2013) - BRISKODA

I can almost guarantee that the problems you are having aren't being caused by faulty expansion tank caps though.

Best of luck with it. 

Many thanks for your valued assistance Wino. I'll head over to that link!

 

Take care and stay safe.