Does anyone know where, in the circuit, the engine oil temperature sensor is?  Is it on the inlet to the engine or is it in the sump?  At what temp does it trigger an alarm?

Similarly, when does the DSG gearbox temperature alarm activate and is it measuring the temp in the box or after the cooler?

Oil temp is generally measured by the oil level and temperature sensor in the sump. Not aware of any alarm associated with it, but I guess you might get a warning light or message: you'd probably have to try quite hard.

 

I can't quite picture where 'on the inlet to the engine' you might expect oil to be flowing?

 

Edited 16 September, 20205 yr by Wino

25 minutes ago, Wino said:

I can't quite picture where 'on the inlet to the engine' you might expect oil to be flowing?

Where the oil from the cooler is piped into the engine!  There is normally a gallery that carries oil to the crankshaft bearings and up to the camshaft bearings.  But I want to see it on a schematic.

Edited 16 September, 20205 yr by farty

What's your engine code? 

I have studied the Yeti workshop manual.  The combined oil level and temperature sensor is screwed into the bottom of the sump.  DFSB is my engine code.

I'd love to know when a high temperature condition is triggered.  Is the sender digital (ie on/off) or analogue?

Edited 16 September, 20205 yr by farty

I don't think there is an alarm for high oil temp.

I think both temperature and level info will emerge as a digitally encoded message.  What temperatures are you seeing?

 

Your engine is too recent for me to be able to find out much about it, unfortunately.

 

What are you actually trying to achieve or understand?

 

As others have said, I'm also not aware of any oil temperature warning alarm. The sender will give the current temperature and it'll probably be the engine ECU or the instrument cluster that decide if it's 'too hot'...

I'm trying to respond to some poor schmuck who sees high oil temps on his BMW.  I told him to upgrade to a Skoda....  (not true).

16 minutes ago, langers2k said:

I'm also not aware of any oil temperature warning alarm. The sender will give the current temperature and it'll probably be the engine ECU or the instrument cluster that decide if it's 'too hot'...

and then it might give an alarm?  

Just now, farty said:

and then it might give an alarm?  

 

It's possible, but as I say it's not something I'm aware of, nor can I see any obvious mentions online from other Skoda owners.

 

I think there is a coolant temperature warning though

4 hours ago, farty said:

Where the oil from the cooler is piped into the engine! 

Does anyone familiar with this family of engines know what @farty means here?

I wouldn't expect there to be a remote oil cooler, with oil piped to/from it; is there?

Edited 16 September, 20205 yr by Wino

There is an oil cooler.  Its a jacket around the oil filter and cooled by the engine coolant.  But the issue is on a BMW on another forum.

I have no idea how similar the BMW engine will be to a Skoda one.

 

I believe your Yeti has a EA288 engine so the G266 sensor is in the sump and the oil circuit looks a bit like this:

 

The oil level/temperature sensor works a bit like this:

 

You should probably try and find something similar to the VAG/Skoda SSP documents for the BMW engine if you want to compare...

Thanks, but the question asked on a caravan forum was 'how hot can the engine oil get before I should worry'.  I said five to ten degrees more than average and definitely slow down if it approaches 120.  So I had to find out where the temp was measured on a typical, modern engine.  

 

I came to this forum because it has a lot of experts and a rapid response.

I think VW group moved oil temperature sensing into the sump when variable-interval servicing came in, which is quite a while back now. Combined level/temperature sensor allowed monitoring/logging of oil temperatures in order to calculate how knackered the oil was, and to tell customers who neglected dipstick checking if the level had got too low, before it completely dried up.

I don't think 120C sounds mad-high, perhaps some caravanners on here could comment?

2 hours ago, farty said:

and then it might give an alarm?  

 

I had Yeti's for 10 years,
I towed with them,
I mud plugged with them,
I generally mistreated them.
I NEVER had an oil temperature alarm, and there is NO mention of such alarm in any of the technical stuff I have seen.

2 hours ago, farty said:

Thanks, but the question asked on a caravan forum was 'how hot can the engine oil get before I should worry'.  I said five to ten degrees more than average and definitely slow down if it approaches 120.  So I had to find out where the temp was measured on a typical, modern engine.  

 

I came to this forum because it has a lot of experts and a rapid response.

 

You must be joking! I know I've seen 120 degrees when towing with NO problems.

7 hours ago, Llanigraham said:

 

You must be joking! I know I've seen 120 degrees when towing with NO problems.

So when would YOU think it's too hot? And were you using a FULLY synthetic oil?

Edited 17 September, 20205 yr by farty

11 hours ago, langers2k said:

I think there is a coolant temperature warning though

 

There most certainly is. Sounds like a smoke alarm and scares the s s smoke outta ya!
Works very well too.

I got this reply from Castrol Technical Enquiries

 

!Up to 120ºc shouldn’t be a problem for a modern synthetic oil occasionally so I would suggest no need for concern

Just make sure the oil is at the correct level and changed on time should be fine"

 

Lycoming say 245 is the max acceptable sump oil temperature and that is 118.3C

 

A Ford 6.0L PowerStroke engine will, apparently, throw a DTC is the oil exceeds 240F (115.6C).  https://www.thedieselstop.com/threads/6-0-max-engine-temp.45935/post-366983

 

I emailed Mobil but have yet to receive a reply.

Another precaution if operating at high temperatures for extended periods is reduced oil change interval.  The two main concerns are increased oxidation (the rate of chemical reactions increases as a power of the temperature difference) and reduced viscosity - this factor is doubly important as the engine will be working harder, so the reduced viscosity has to support a higher load.  Towing would be considered a severe operation and would usually mean reduced oil change intervals should be applied - changing the oil more frequently would help overcome the oxidation issue.

 

Other effects of high operating conditions and/or towing would be increased oil consumption (partly from possibly higher blow-by, but also due to increased volatility) and increased oil contamination from the additional fuelling used under higher load (could be more soot - especially if diesel - or increased fuel dilution).  Keeping the oil level topped up to 'max' will always help any engine, by having the maximum amount of oil available to absorb the heat and load, and every little top-up adds a fresh shot of additives to bolster the oil.

10 minutes ago, weasley said:

reduced oil change interval

In theory, the oil temp monitoring is looking after that for you if on variable servicing? In practice, I wouldn't be confident in it.

6 hours ago, farty said:

So when would YOU think it's too hot? And were you using a FULLY synthetic oil?

 

I suspect I might get worried at 140 degrees.
And all my Yetis used the officially approved oil, so that was a pointless question.

My first Yeti did over 110k miles, all lot of them working hard towing and off road, and it still didn't use any oil between services.

 

Edited 17 September, 20205 yr by Llanigraham

That would be my threshold point as well Graham.

 

Its nice to actually be able to watch the oil temp during times of high load, never been able to do that on previous Skodas.

 

I would think that the oil-water intercooler would keep it below the threshold & that the cooling system would generate an alarm before the oil was at risk of degrading. Assuming the sump level was not too low that is.

Edited 17 September, 20205 yr by J.R.