D40 Euro 5 onwards conversion to duplex

D40navaraGuy · Jan 21, 2017

Hi guys,

Im not asking for recommendations and read how good billcar is. I can read they are all over the forum here and to me it smells more like a campaign for them (however there are few customers don't seem to be too satisfied with them). Im not interested in adverts or recommendations.

Im just a regular Navara owner and I would like to ask if anyone has had experience in converting D40 Euro 5 timing chain to duplex?
The forum is full of threads and discussions of the duplex conversion but I couldn't find much about converting a Euro 5 engine. I either missed something or the info is outdated on the forum.
As far as I know if someone wants to convert a Euro 5 engine then the balance shaft drive gear should also be changed. Is it true or not? I've read many threads here on this forum but all threads are related to Euro 3-4 engines and not Euro 5 and onward.
Im ahead of changing my timing chain on my Navara (reg WD12 AOK) but I would rather not pay 800-£1200 for a kit. Im just interested if anyone successfully converted their Euro 5 engine to duplex or not. If yes what parts need to be sourced.

I watched a video on Youtube (I don't mention from whom) and he says the balance gear should also be changed as Nissan changed almost the entire chain drive. If it is true what gear I should source?

From 2012 Nissan seem to changed their vacuum pump. There is a newer version of the vacuum pump and sice they changed the vacuum pump significantly changed
Here is the newer vacuum pump from 2012:

Earlier D40 single row vacuum pump before 2012:

I don't think swapping the shaft with the double sprocket is optional. Anyone have any ideas how this conversion is done on a Euro 5 engine and/or after 2012?

Please again... I dont need anyone convincing me that using genuine parts are good or not.

Thank you guys

landmannnn · Jan 21, 2017

While I can't answer your specific questions, the D40 was fitted with a French made chain until 2010, then they responded to the problem using a Japanese Tsubaki chain. I can't recall any mention of snapped chains on here post 2010, although Billcar do a kit for it.

It seems likely, but not proven that whilst not fully sorted, that the post 2010 is much more reliable.

D40navaraGuy · Jan 21, 2017

Thanks Landmannnn,

Yes.. my problem is that all threads on the forum are related to Euro 3-4 engines.
I acknowledge billcar's experience in this field but I don't think everyone should depend on one company's expertise and travel 200miles (from where I lieve) to their premises to get an upgrade done for £800 or more.
I've read that they no longer sell their upgrade kit separately.
I thought some members here have experience with upgrading a Euro 5 or younger Navara models. Im rather interested in the technical side of this upgrade so we could share it helping others.

landmannnn · Jan 21, 2017

You are right, it would be good to share any collective knowledge.

Don't necessarily believe what you read, Billcar and several others including FAI have the kits available to buy on their own, just pump something like in Navara duplex timing chain into ebay....

D40navaraGuy · Jan 21, 2017

I did my research before I opened this thread. Simplex chain came out in 2006.. Whichever duplex conversion you check on ebay you will find that all kits are up to 2010-11. After the newer Euro 5 engines came out and Nissan modified their sprockets related to timing.
So from 2011 the new Euro 5 engines' sprockets are different to Euro 3-4. This lead to a change of the position (design) of the balance shaft gear.
This two video explain everything pretty well:

Difference in components from 2011 Euro 5 engines:

The duplex can be done but then the balance gear should also be changed. Unfortunately the guy didn't explain what that gear is or what gear he uses. I emailed him that Im happy to purchase a kit from him but although he keeps repeating his email address in his videos he doesnt answer. Im not sure why he adverts himself if he doesnt want to sell and earn money.:

Uselescrapytwit · Jan 21, 2017

I thought the late models ie 2010 and 12s had updated electronics to measure the slack in the chain by compairing data from crank and cam position censors. And if it measured over it cut out after running at idle for 5 seconds.
I might be wrong as I am neering that officially old age marker where I wake up apparently with no mind and dribbling! 11 days to go.

D40navaraGuy · Jan 21, 2017

Uselescrapytwit said:
I thought the late models ie 2010 and 12s had updated electronics to measure the slack in the chain by compairing data from crank and cam position censors. And if it measured over it cut out after running at idle for 5 seconds.
I might be wrong as I am neering that officially old age marker where I wake up apparently with no mind and dribbling! 11 days to go.

It might be true but engine cutoff would help you with identifying the problem before the damage gets done.

Furthermore as I mentioned Navara have changed their vacuum pump 2012 onward. From the picture I linked I can see that swapping the older D22 shaft and sprocket is not an option. The older D22 bearing would not fit the newer 2012 vacuum pump. It has a completely different design.

"Ultraparts" offer a kit on their website for Euro 5 engines. In their picture they also include a new balance gear in their timing kit. (In their same kit of Ultraparts on ebay that extra gear has been cout out of the picture. Interesting.) It just proves the guy in the video.
I emailed Ultraparts as well and I asked them for the kit if it is going to fit my engine and if they also include that extra gear. They replied that they get back to me shortly. Well... will see when if..
This lead me to open a thread and read after what we are about to do on my engine and what this issue is with Navara engines.
Then I found that Nissan changed their vacuum pump in 2012.
Years passing and this thread soon might be valuable for those who's timing chain is due to be replaced in their 2012 and 2013 engines.

lookskyward1 · Jan 21, 2017

There's some valuable information there thanks. :thumbleft:

Are you looking to do this job yourself?

If not, there are a couple of other 'specialists' nearer to you that we would recommend but Des Marples and WYE are far from this short list.

As for promoting Billcar, they are forum sponsors but this is genuine feedback. I and others are nothing but satisfied customers that have received great service which is can be in short supply in the motor trade.

When you refer to replacing the balance gear, do you mean the cog itself or the whole balance shaft assembly?

D40navaraGuy · Jan 21, 2017

lookskyward1 said:
There's some valuable information there thanks. :thumbleft:
When you refer to replacing the balance gear, do you mean the cog itself or the whole balance shaft assembly?

Well... this is what I don't know.

This info above all that I could find out. I hoped someone have done job on Euro 5 engines and can tell his experience.

As I mentioned before I admit that Billcar have added a lot to provide good quality parts, service and expertise. I don't dispute it at all. I've also read their upgrade manual here. A great help for everyone here.

Im a D40 owner only and I would not do this job. My initial idea is to source parts (so I can decide what quality I want to buy of what) and make my mechanic do the job. I would not pay £7 for a bolt. I just want to know what we fit in my engine rather than take somewhere and pay a big sum of profit on it (not mentioning company!).

Jamez79 · Jan 21, 2017

I'd really appreciate a "Shopping list" of the parts I require to do the duplex conversion myself. I'd use genuine Nissan parts for everything except the modified sprocket.

Can anyone provide the list of bits needed for a euro 5 conversion?

Thanks

James

D40 Euro 5 onwards conversion to duplex

D40navaraGuy

landmannnn

D40navaraGuy

landmannnn

D40navaraGuy

Uselescrapytwit

D40navaraGuy

lookskyward1

D40navaraGuy

Jamez79

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