- 204ps Bi-Turbo CXEB T6 Engine & Turbo problems -

[RunDSG]

Horror stories. Truly the stuff of nightmares.

After replacing turbo and DPF two years ago, I feel like I’m still walking on egg shells.

I’m humming along… using consistently 0.5L per 1000 miles. Doesn’t seem to be getting worse, and seems about the same as before getting all the work done.

Very happy for those getting some/most of their new engines paid for. Gutted for those having to fully fund their own.

I’m just hoping to be able to carry on as is.

Meanwhile, DMF is rattling like hell… that’s next.

 

[DXX]

I’ve got a 180ps CFCA, no oil consumption between oil services.
If I had a 204ps that consumed oil I’d first install a separator trap between the PCV and the induction to rule out an ineffective PCV.
The cost is minimal, if the PCV is passing oil you really don’t want that crap going back into the engine to create more piston ring, EGR and DPF fouling carbon.

 

[RunDSG]

I’ve got a 180ps CFCA, no oil consumption between oil services.
If I had a 204ps that consumed oil I’d first install a separator trap between the PCV and the induction to rule out an ineffective PCV.
The cost is minimal, if the PCV is passing oil you really don’t want that crap going back into the engine to create more piston ring, EGR and DPF fouling carbon.

Interesting. I’ll use AI to better understand what this means and then speak to a mechanic.

Edit: I get it. Makes really good sense. Thanks @DXX and ChatGPt.

 

[Del94]

Horror stories. Truly the stuff of nightmares.

After replacing turbo and DPF two years ago, I feel like I’m still walking on egg shells.

I’m humming along… using consistently 0.5L per 1000 miles. Doesn’t seem to be getting worse, and seems about the same as before getting all the work done.

Very happy for those getting some/most of their new engines paid for. Gutted for those having to fully fund their own.

I’m just hoping to be able to carry on as is.

Meanwhile, DMF is rattling like hell… that’s next.

Same here re works and time scale.

I recently had an oil analysis done by Darkside and got a positive result other than a very slight increase in the iron section.

Advised to shorten the time between oil changes.

Apart from selling what else can you do?

I absolutely love the van BTW, bought in 2018 now has 87k. My daily driver

 

[TacticalBrick]

I have an early 2018 CXEB that has used an "unknown" amount of oil in 900 miles. It was filled to approx 2/3rds full when having the oil sensor changed for another ongoing issue which it unfortunatley didn't resolve and now it's dead on the min line.

If VW specs is a max of 500ml per 621 miles, that's 0.805ml per mile

Mine is something between:

500ml per 900 miles (assuming half full) = 0.556 ml per mile
or
666ml per 900 miles (assuming 2/3rds full) = 0.740 ml per mile
or
700ml per 900 miles (rounding up 2/3rds full) = 0.777 ml per mile.

Which are better than the max acceptable loss, but close. The DPF is doing the regen every 150 miles or so, which I believe is normal. I've monitored it like a hawk since noticing the oil dropping.

I have an early 2018 CXEB that has used an "unknown" amount of oil in 900 miles. It was filled to approx 2/3rds full when having the oil sensor changed for another ongoing issue which it unfortunately didn't resolve and has had another 500ml added - now it's dead on the min line.

What should I ask for diagnostic wise or am I over thinking it? I've been quoted nearly £300 for a compression test which seems like a lot. Visual checks have found no oil leaks.

Is checking turbo seals less/effort and therefore a cheaper job?

Would an oil sample test be worth it after only 900 miles on new oil?

*edited by request

 

[Sasquatch]

I think there's a fair bit of labour, swearing, and risk of breaking parts when removing the glow plugs to accommodate compression tester, likely hence the price.

 

[DXX]

Would an oil sample test be worth it after only 900 miles on new oil?

The oil analysis obviously takes into account the mileage but probably best to get another 1000 on the clock.

 

[WinFreak]

My oil analysis from Millers came back fine even though it was munching through a litre of oil every 500 miles

 

[rmiller504]

So my van can be added to the list. 2017 BiTDI CXEB, 65k

After purchasing on 1st April, I started to suffer with some MAF sensor issues. I assumed this was the common problem so replaced it not thinking much else. This fault kept coming back along with various others but the van was running fine until..... driving up a hill out of a village, got to the national speed limit so accelerated (not very hard at all) and was hit with a limp mode. When I stopped I was quickly surrounded by white smoke.

Long story short, took the van to Retro Resus for diagnosis to discover that the turbo was blown, the EGR was clogged (second one from what I can tell) and issues with the DPF sensor. My compression test showed that 2 of the 4 cylinders are right on the limit for pressure. Roughly £8k to sort it all out. Have had the van back for about 3 weeks now and all seems to be running well. I can't say enough good things about Retro Resus after how they dealt with it all.

The best part is that I'm having to go through the finance company to try and reclaim some of the money under the Supply of Goods Act (Implied Terms), as the garage I bought it through didn't want to know, not a VW Dealership.

 

[DXX]

My oil analysis from Millers came back fine even though it was munching through a litre of oil every 500 miles

The engine oil soot levels were good after burning that much oil?

So my van can be added to the list. 2017 BiTDI CXEB, 65k

After purchasing on 1st April, I started to suffer with some MAF sensor issues. I assumed this was the common problem so replaced it not thinking much else. This fault kept coming back along with various others but the van was running fine until..... driving up a hill out of a village, got to the national speed limit so accelerated (not very hard at all) and was hit with a limp mode. When I stopped I was quickly surrounded by white smoke.

Long story short, took the van to Retro Resus for diagnosis to discover that the turbo was blown, the EGR was clogged (second one from what I can tell) and issues with the DPF sensor. My compression test showed that 2 of the 4 cylinders are right on the limit for pressure. Roughly £8k to sort it all out. Have had the van back for about 3 weeks now and all seems to be running well. I can't say enough good things about Retro Resus after how they dealt with it all.

The best part is that I'm having to go through the finance company to try and reclaim some of the money under the Supply of Goods Act (Implied Terms), as the garage I bought it through didn't want to know, not a VW Dealership.

Sounds like it was sold with a known defect/s.
There’s a pretty good chance that VW dealership was unaware but the previous owner probably did and off loaded it.
What’s the oil service history?

 

[rmiller504]

The engine oil soot levels were good after burning that much oil?

Sounds like it was sold with a known defect/s.
There’s a pretty good chance that VW dealership was unaware but the previous owner probably did and off loaded it.
What’s the oil service history?

Yep, having done some digging through the fault 'first seen' etc on VCDS, it was all cleared before I got it. Frustrating but in the hands of the finance company now. As I say, it wasn't from a VW Dealer, just a trader up around Derby who are a 'specialist' apparently. I will hold off naming and shaming until all the finance company stuff has been sorted.

Service history is good. I've since found a receipt for a remap back in 2022, that we think might have accelerated the issues, but can't be sure.

 

[DXX]

I've since found a receipt for a remap back in 2022, that we think might have accelerated the issues, but can't be sure.

IMO it won’t have helped, VW squeezed the most out of it anyway. There’s no shortage of ‘tuners’ who’ll take the money to do it but none who’ll give it a reliable warranty

 

[WinFreak]

The engine oil soot levels were good after burning that much oil?

 

[DXX]

View attachment 298457

I should have asked what the oil hours were.
Soot Caution level is 1% and Critical Limit is 2%.
I’m typically getting 0.7% soot with 7K miles (NO EGR) on a 180ps CFCA, no oil consumption (dipstick). ‘Loosing’ the EGR makes a massive difference in soot levels.

 

[WinFreak]

12000 miles it says on the pdf but not too sure that was right, been a few years since we had it done.

I’m so glad the van is gone now, such a ticking timebomb and the looming £18k bill for engine replacement at Retro Resus has been used for buying the new van which hopefully proves to be more reliable!

 

[DXX]

12000 miles it says on the pdf but not too sure that was right, been a few years since we had it done.

I’m so glad the van is gone now, such a ticking timebomb and the looming £18k bill for engine replacement at Retro Resus has been used for buying the new van which hopefully proves to be more reliable!

I bet you are.
Problem with data is garbage in = garbage out, the analysis results aren’t worth much. Anyway the ball and chain has changed hands.

 

[WinFreak]

I bet you are.
Problem with data is garbage in = garbage out, the analysis results aren’t worth much. Anyway the ball and chain has changed hands.

No no she’s still there, it’s the van that’s gone

 

[temporarysecretary]

I should have asked what the oil hours were.
Soot Caution level is 1% and Critical Limit is 2%.
I’m typically getting 0.7% soot with 7K miles (NO EGR) on a 180ps CFCA, no oil consumption (dipstick). ‘Loosing’ the EGR makes a massive difference in soot levels.

For reference, this week I have done an oil analysis on 7K oil with a healthy CXEC enginer and EGR present. Soot was 1.4%

 

[temporarysecretary]

My oil analysis from Millers came back fine even though it was munching through a litre of oil every 500 miles

If you are adding 20 litres of oil to a 7l sump over 10k miles. Its not 10k miles oil anymore.

Once it's damaged the oil analysis doesn't add much value anymore.

 

[DXX]

For reference, this week I have done an oil analysis on 7K oil with a healthy CXEC enginer and EGR present. Soot was 1.4%

Same soot level as my 180ps without an EGR then.
I think the normal 10K or 12K miles oil services are not frequent enough at least on a BiTurbo T6 due to the high boost pressure and resulting soot level.
I’ll be changing the oil and filter at 7K intervals.