[GUIDE] DPF Experiment and Results

[RoyMacDonald]

Originally Posted by MrBenjaminHDM

If we're going to play semantics then bombproof is hardly the correct description either, I don't think it would sustain a direct hit from a B61 nuclear bomb ;-).

The D5 engines have shared the same block, cylinder bore, stroke, turbos, common rail and compression ratios across different generations including 163-185. I'm not saying the DPF is an afterthought or even that it is done badly, what I am saying is that the D4 in it's current iteration was built from scratch to include a DPF. Over the years and even in this forum there has been DPF issues and oil level caused by DPF issues on the D5 highlighted and discussed.

I think you will find most of the rising oil level issues were on the new D3 2litre 5 cylinder engine not the D5. Only one Spanish D5 was reported on the forum as having an issue and Volvo took that engine back to Sweden to investigate and replaced it with a brand new engine.

The original and later D5's do not share the same block, the original being cast and the later one pressed. They do not share the same turbos, the original being a single turbo and the later turbo being a twin type. The cylinder heads are completely different with completely different 7 hole injectors using a different pressurisation system. The pistons, crankshaft and conrods are completely different. The stroke and bore are the same but that is of little relevance.

Roy

[MrBenjaminHDM]

Originally Posted by RoyMacDonald

I think you will find most of the rising oil level issues were on the new D3 2litre 5 cylinder engine not the D5. Only one Spanish D5 was reported on the forum as having an issue and Volvo took that engine back to Sweden to investigate and replaced it with a brand new engine.

The original and later D5's do not share the same block, the original being cast and the later one pressed. They do not share the same turbos, the original being a single turbo and the later turbo being a twin type. The cylinder heads are completely different with completely different 7 hole injectors using a different pressurisation system. The pistons, crankshaft and conrods are completely different. The stroke and bore are the same but that is of little relevance.

Roy

You misunderstand, I didn't mean every D5 is the same each iteration has a change or as I so quaintly put it, a tinker. The 130, 163 and 185 all have VNTs whereas the later generations have the borg warner sequential twin turbos for example.

And I have a Swedish D5 215 that has hit 150% oil from the DPF regens, it is an inherent design flaw caused by injecting fuel during the exhaust stroke that affects many engines to different degrees, Volvo or otherwise.

This is hardly the place to debate the finer details of Volvo's engines though, so let's stop at that.

[RoyMacDonald]

Originally Posted by MrBenjaminHDM

You misunderstand, I didn't mean every D5 is the same each iteration has a change or as I so quaintly put it, a tinker. The 130, 163 and 185 all have VNTs whereas the later generations have the borg warner sequential twin turbos for example.

And I have a Swedish D5 215 that has hit 150% oil from the DPF regens, it is an inherent design flaw caused by injecting fuel during the exhaust stroke that affects many engines to different degrees, Volvo or otherwise.

This is hardly the place to debate the finer details of Volvo's engines though, so let's stop at that.

All the engines Volvo fits in the EU are made in Sweden. The rising oil level is not a know issue anymore so I think there must be some other problem with your engine and suggest you contact a main dealer to investigate.

Some info from Volvo on the latest 215 bhp engine.

Most of the latest engine-related improvements apply to both the D5 and D3 engines:
•Both the camshafts and connecting rods have been weight-optimised, that is to say they do the same efficient job using a smaller amount of steel.
•The new piston rings are of low-friction type.
•The oil pump is chain-driven.
•With the piston cooling valves controlled solely by demand instead of opening regularly, consumption can be reduced.
•The new vacuum pump has been optimised to affect the engine as little as possible.
•The D5 engine now gets the same lighter type of connecting rod that the 2-litre D3 had when it was introduced in 2010.
•All six-speed manual versions also get start/stop, which switches off the engine when the car is at a standstill. The engine fires up immediately when the driver presses the clutch pedal.
•All variants are also available with a six-speed automatic transmission.

There are effectively 4 different engines that compose the 5 cylinder D5 group of engines.

Roy

[MrBenjaminHDM]

Originally Posted by RoyMacDonald

All the engines Volvo fits in the EU are made in Sweden. The rising oil level is not a know issue anymore so I think there must be some other problem with your engine and suggest you contact a main dealer to investigate.

Some info from Volvo on the latest 215 bhp engine.



Roy

Already booked in my friend.

[SwissXC90]

Originally Posted by MrBenjaminHDM

Not necessarily true I'm afraid, it's not that simple. The DPF will only regenerate once you're beyond a certain soot level. I'm averaging one Regen per one tank of fuel, the list of criteria in my original post is straight from VIDA and therefore your journeys and driving styles are a big factor. You seem to have found a sweet spot with your commutes.

I understad the regen threshold.
I do regular motorway drives, but I do not commute.
I did the calculations and for me the DPF goes into regen at around 1.5 tanks of fuel.

[MrBenjaminHDM]

Originally Posted by SwissXC90

I understad the regen threshold.
I do regular motorway drives, but I do not commute.
I did the calculations and for me the DPF goes into regen at around 1.5 tanks of fuel.

My point is you could drive for several hours on the motorway to get from 0g to 22g then do a lot of city driving and interrupt a lot of regens. If you don't have a motorway drive every few days, perhaps less than weekly you risk doing this. It's good to be aware of when it's started so you can accommodate it.

[wimorrison]

Originally Posted by RoyMacDonald

I think you will find most of the rising oil level issues were on the new D3 2litre 5 cylinder engine not the D5. Only one Spanish D5 was reported on the forum as having an issue and Volvo took that engine back to Sweden to investigate and replaced it with a brand new engine.
...

The problems were most definately with the 205 D5, check the threads here on the subject. I know that my software was updated 3 times to overcome the issue.

It still happens to owners who havent been to main dealers and had the car software updated.

[MrBenjaminHDM]

Originally Posted by wimorrison

The problems were most definately with the 205 D5, check the threads here on the subject. I know that my software was updated 3 times to overcome the issue.

It still happens to owners who havent been to main dealers and had the car software updated.

Mines a 215 with polestar, bought it in 2016 after a Volvo selekt service I've since spoken to my local dealer who says it has no updates. I'm going in on Friday to see if they can find anything.

[phil1968]

Very informative thankyou, I thought DPF regeneration was solely carried out at motorway speeds but that isn't the case
I know when my D5 is carrying out a regen as the exhaust becomes more boomy (it's just a straight pipe from the cat / DPF back) & once in a blue moon I had in fact experienced that same boominess at lower than motorway speeds, so that does indeed back your info up.

[RoyMacDonald]

Originally Posted by phil1968

Very informative thankyou, I thought DPF regeneration was solely carried out at motorway speeds but that isn't the case
I know when my D5 is carrying out a regen as the exhaust becomes more boomy (it's just a straight pipe from the cat / DPF back) & once in a blue moon I had in fact experienced that same boominess at lower than motorway speeds, so that does indeed back your info up.

You know there is a silencer after the DPF I take it? You can see the DPF sensors if you look down the back of the engine. http://www.volvoforums.org.uk/showpo...6&postcount=12

Roy