EGR should we all be more concerned

[Greg Roles]

Oh to have that much engine space and access.

I've been into my Provent install today, and made some changes to improve the function. I'm into the EGR and Flap mechanism now, and while it is still coated somewhat in black oil, it's only a film, so I think the washer bottle of cleaner / metho I had drawing into the inlet has indeed had some effect. Given it's silly to add any sort of fuel to a diesel prior to injection, I'd put a bit of confidence in the idea of a "flush" while running, as discussed earlier in the thread, and only be concerned if you have a DPF.

The new element in the Provent has made a huge difference, and the output hose looked quite dry. Seems to me that once the element gets totally oil soaked, it's performance drops right off. I'm going to renew the element every 20k, as at 30k when I recently renewed mine it had well and truely soaked through. I started seeing a lot more oil in the inlet system, and it's back to being rather clean again.

[Transporter]

Oh to have that much engine space and access.

I've been into my Provent install today, and made some changes to improve the function. I'm into the EGR and Flap mechanism now, and while it is still coated somewhat in black oil, it's only a film, so I think the washer bottle of cleaner / metho I had drawing into the inlet has indeed had some effect. Given it's silly to add any sort of fuel to a diesel prior to injection, I'd put a bit of confidence in the idea of a "flush" while running, as discussed earlier in the thread, and only be concerned if you have a DPF.

The new element in the Provent has made a huge difference, and the output hose looked quite dry. Seems to me that once the element gets totally oil soaked, it's performance drops right off. I'm going to renew the element every 20k, as at 30k when I recently renewed mine it had well and truely soaked through. I started seeing a lot more oil in the inlet system, and it's back to being rather clean again.

Yeah, it was easy to plumb it in T5.
GolfV TDI without DPF should be no problem too, since there is enough space where the DPF is in 125kW TDI.
I clean mine every 30,000km by removing whole Provent incl. hoses out and change the inside cartridge, drain any oil out of the Provent and wipe it clean inside, also wash the inlet and outlet hoses with good water based detergent and hot water, let it dry and put everything back, it took me 1 hour yeasterday including pictures taking.

[Greg Roles]

If you read the contaminated diesel thread, and see Zydecat was quoted about $5k for a replacement DPF, well you should be VERY concerned about EGR, or more specifically the oil vapour blow by. This will only help eventually clog your ultra expensive DPF, and my Provent became a whole lot more worth the price to me!!

[benough]

I just spoke to my dealer about this.

Cleaning out the EGR is NOT part of the scheduled maintenance because they believe that they are designed so that they don't clog up to the point of failure.

That said they have had issues with this happening but that was due to the crap quality of local fuel up until about 12 months ago.

They include diesel conditioning additves in services, can do that at the servo for a tenner, but they will have it cleaned for 1 hours labour charge upon request.

My question on all of this is, is anyone really expecting for their EGR to be squeaky clean it's whole life? They are always gonna have crap in them right? So isn't it just about keeping it under control? And if so how does one determine what an acceptable level is? Black sludge in any part of your motor will look scary...

(Go easy Cog D! )

[Transporter]

Hey Greg,
You should try SpeedTec Diesel from LiquiMoly, diesel burns faster with it and it reduce the particles. I have to install the pyro probe in my van. Where from did you get yours?

[Greg Roles]

Already checked it out at supercheap, but given the crazy $22 price and the fact it's just a bottle of liquid hydrocarbons and a little napthelene like all the others, might as well just throw in a few mothballs. When it drops down in price cause no-one buys it, I'll try it to see if anything is noticable.

As the injectors are in the head and thus WAY after the EGR and oil vapour inlet, the heart of this threads problem, adding all the diesel cleaner in the world to the tank won't clean the inlet of oil / sludge. It's why I tried passive injection with that bottle just after the MAF. Check out "Fuel Doctor" though, it "seems" to be one of the better algae specific killing types.

A clogged up EGR is no longer my problem. My provent "gas" outlet is being plumbed into the exhaust, after the DPF. Thus I collect the waste oil, any vapour left is burnt post DPF, and my inlet is now virtually oil vapour free ( a small amount will always escape the turbo bearings ).

[Transporter]

Already checked it out at supercheap, but given the crazy $22 price and the fact it's just a bottle of liquid hydrocarbons and a little napthelene like all the others, might as well just throw in a few mothballs. Better things to add for more poke!

As the injectors are in the head and thus WAY after the EGR and oil vapour inlet, the heart of this threads problem, adding all the diesel cleaner in the world to the tank won't clean the inlet of oil / sludge. Check out "Fuel Doctor" though, it "seems" to be one of the better algae specific types.

A clogged up EGR is no longer my problem. My provent "gas" outlet is being plumbed into the exhaust, after the DPF. Thus I collect the waste oil, any vapour left is burnt post DPF, and my inlet is virtually oil vapour free ( a small amount will escape the turbo bearings ).

Of course it will not clean the EGR it will help with your DPF.
Haven't said that less unburned fuel will affect cleanliness of oil and the oil which will get in the EGR will be a clean oil and it will not clog the EGR.

I bought that SpeedTec at Super Cheap when they had 20% off, so it was a bit cheaper. I'm not sure if I would drop the mothballs in the tank.

[Greg Roles]

Of course it will not clean the EGR it will help with your DPF.
Haven't said that less unburned fuel will affect cleanliness of oil and the oil which will get in the EGR will be a clean oil and it will not clog the EGR.

I bought that SpeedTec at Super Cheap when they had 20% off, so it was a bit cheaper. I'm not sure if I would drop the mothballs in the tank.

Sorry mate, but VW themselves say ANY oil will form a permanent ash to clog the DPF, eventually. Can't see "clean" oil burning to ash much better. Seems silly to add ash to an already "going to clog from soot" $5k filter!



Oil vapour PLUS EGR = sludge. Now I only have Exhaust gas, can't see that forming sludge.

[Transporter]

Sorry mate, but VW themselves say ANY oil will form a permanent ash to clog the DPF, eventually. Can't see "clean" oil burning to ash much better. Seems silly to add ash to an already "going to clog from soot" $5k filter!



Oil vapour PLUS EGR = sludge. Now I only have Exhaust gas, can't see that forming sludge.

That's what I'm talking about if you burn fuel better there will be less soot in the exhaust and less soot in EGR gases re-circulated. How ever you always get some oil in the oil vapors in your inlet. I'd rather have clean oil with vapors than the oil loaded with the soot.

That’s why I use diesel fuel additive for better more complete burn
Installed Mann Provent
Change my oil every no more than 7,500km or 6 months

Over the time the engine will be less worn out and there will be less blow by gases with less oil vapors than if the oil is changed yearly or every 15,000km or even more.

[gtimk5]

I had a great success with the job I did on a customers T5. He is one happy fella!!