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nap69

Active Member
Apr 20, 2009
16
8
Hey all i have a Leon FR 184 Cuna and i am chasing oil use of 1L in 1300 miles,among other things i am about to replace the pcv valve and need to take a couple of injectors out,can anyone confirm that the torque for the replacement injector clamp bolt is 8nm plus 270 deg?........8 nm doesnt seem like a lot!
TIA............
 
Latest results,
I have done 1488 miles since the change to RP - and i'm currently around 66% on my dipstick - which is 0.23L/1000 miles vs around 0.28 for long term average (18% improvement), and around 1L per 4350 miles, vs 1L per 3500 long term ave.
I think a good improvement in a short distance. I will do an oil change around 4-5k miles and continue to monitor.
I've bought the RP but recently done an oil and filter change so it won't get done for a few more months. From what I read, it suggeted an oil and filter change after about 4000 miles to get the sludge and crud out and then rinse and repeat. How many miles do you plan to do before a change?
 
Ok, slight update, changed the pcv valve(was shot at), did the piston soak, had a slight delay putting it back together (don't ask!), small gentle run @ 20 miles with around 500ml of Berrymans still in the oil today and then dropped the oil, gonna refill with cheap oil today, do 1000 miles and see if there is any improvement in the oil consumption... I'm not willing to put in the expensive Valvoline RP unless I think I can do something about the oil use without resorting to engine rebuild /piston ring replacement because that's not an option.... I'll keep you posted! BTW SuperV8 that really does sound promising!
 
Ok, slight update, changed the pcv valve(was shot at), did the piston soak, had a slight delay putting it back together (don't ask!), small gentle run @ 20 miles with around 500ml of Berrymans still in the oil today and then dropped the oil, gonna refill with cheap oil today, do 1000 miles and see if there is any improvement in the oil consumption... I'm not willing to put in the expensive Valvoline RP unless I think I can do something about the oil use without resorting to engine rebuild /piston ring replacement because that's not an option.... I'll keep you posted! BTW SuperV8 that really does sound promising!
Fingers crossed for you. Interested to hear how your consumption fairs.
 
I've bought the RP but recently done an oil and filter change so it won't get done for a few more months. From what I read, it suggeted an oil and filter change after about 4000 miles to get the sludge and crud out and then rinse and repeat. How many miles do you plan to do before a change?
Similar mileage to you.
I will do an oil change around 4-5k miles and continue to monitor.
 
On the frequent regen issue, I am having the same issue.
Also having a lumpy idle so conected up the VCDS and discovered that I have a weeping injector.
New one should arrive in a couple of days so I'll report back with my findings.
IMG_8679 (2).jpeg
 
On the frequent regen issue, I am having the same issue.
Also having a lumpy idle so conected up the VCDS and discovered that I have a weeping injector.
New one should arrive in a couple of days so I'll report back with my findings.
View attachment 55775

Injectors can cause frequent regens due to producing more soot than expected.
Also check your O2 sensor - they have a finite life and are important feedback for the engine and also can impact soot loading and regen frequency. Recommended change interval from Bosch = 250,000 km
 
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Injectors can cause frequent regens due to producing more soot than expected.
Also check your O2 sensor - they have a finite life and are important feedback for the engine and also can impact soot loading and regen frequency. Recommended change interval from Bosch = 250,000 km
Thanks I'll check it once I've got the injector back, due this morning.
 
What's your oil consumption like?
How often is it doing a regen?
What's your average driving like/ miles per trip?
I've not had the car for long, maybe a month and done approx 700 miles since changing the oil.
Probably only used around 100ml of oil during that time so pretty happy with that.
It regens about every 30 miles or so which along with the lumpy idle led me to check the injectors.
I don't do many longer journeys than about 15 miles but always complete the regens once they start.
Hopefully once the injector is coded in and balanced I'll give it a run and see a difference.
 
I've not had the car for long, maybe a month and done approx 700 miles since changing the oil.
Probably only used around 100ml of oil during that time so pretty happy with that.
It regens about every 30 miles or so which along with the lumpy idle led me to check the injectors.
I don't do many longer journeys than about 15 miles but always complete the regens once they start.
Hopefully once the injector is coded in and balanced I'll give it a run and see a difference.
Certinaly that injector wants looking at.
Keep a log of any oil you add - and at what mileage.
What's your differential pressure sensor pressure (mbar)after a regen?
 
If that's at idle then that's too high, hopefully this will come down with your new injector.
Could be that your filter is blocked.
Yes that's at idle.
From what I can gather the soot calculated and measured both look at this measurement to indicate soot content.
The fact that my injector was leaking would have not done the dpf any good so it's going to have an in car clean and see if that will reduce pressure.
It's already done a regen within 30 miles of having the injector changed so a good clean can't hurt.
 
Yes that's at idle.
From what I can gather the soot calculated and measured both look at this measurement to indicate soot content.
The fact that my injector was leaking would have not done the dpf any good so it's going to have an in car clean and see if that will reduce pressure.
It's already done a regen within 30 miles of having the injector changed so a good clean can't hurt.
Welcome to the rabbit hole of DPF's!
Measured and calculated use two different methods (algorythms) for 'estimating' soot loading. Either can trigger a regen when it gets to a certain threshold. Measured mainly uses the DPF pressure sensor.
My measured soot mass climbs up much faster than calculated, and then when measured get to 24g the calculated zooms up to meet it and a regen starts. This is common behavior when your DPF is getting full of ASH.

In car DPF clean can only effect SOOT - but if there is a soot problem, then there is a cause behind that, sensor/driving style/etc..
If you have an ASH problem on car cleaning won't touch this. Ash is the by-product after a regen of burning all the stored soot in your DPF, and is none-combustible. To clean out any ash - it needs to be back flushed the way it came in, with some mild acid.

Ash is also produced & stored by the combustion of oil (if your car burns a little oil from piston rings or turbo) and fuel (cheaper fuel can produce more ash)
O2 sensor, Injectors, EGR, DPF pressure sensor, Turbo, Piston rings, glow plugs, can all contribute to more frequent regens. You need to evaluate each.
I brought an 3.9mm articulating borescope from Temu and it's been brilliant.
I'm at 160k miles. With my borescope I was able to inspect my turbo (inlet and outlet) for oil and looks perfect, and also inspect my EGR valve and again looks great. I borescoped my cylinders - and can see some carbon around the tops of the cylinders. I get some oil going through my cylinder cover outlet into the inlet, changing my cylinder head cover did help, but I think my blowby is overwhelming the oil separator - so for my case I believe over the years of burning a little oil this has slowly filled my DPF of Ash. I've never had a DPF warning light. Its currently regening every 90-100 miles. It was down to 30-40 miles, but changing my O2 sensor really helped move the needle, as I mentioned previously they only have a finite life. I had all my injectors cleaned and checked on an injector test machine and all were fine - but this did help make my engine feel smoother.

Good luck.