Injectors misbehaving but trying to understand the numbers

[darbuck]

Yes They burn well when they dry out a bit like paper a pouffe and they're gone . Yeah I think it won't take too long once I get one out as for the car it should be back together for testing tomorrow.

[darbuck]

Thanks for the encouragement Kenny I'll post a few pictures of the car when I have it back together. I have cut the leylandiis back a few times but they grow back so fast, the only cure is to remove them completely.

[darbuck]

I'm not happy, its blowing smoke signals again and leaking oil from the same spot pulled the PCV hose to see if there is much oil or blowby. Very little oil and blowby is quite weak more of a gentle breeze. I am at a loss,

[MattBLancs]

sorry to hear that

[darbuck]

I think the issue is blowby lifting oil at high rpms as you previously alluded to but the amount of oil in the PCV system is very small but it is at the compressor side of the turbo. I will try and do a relative compression test in a while which should tell me if one of the cylinders is down. Maybe cleaning up the head was a bad idea because now there are places to leak where there used to be carbon. I would have said perhaps oil still in passage ways but given the fact it's leaking from the same spot rules that theory out unfortunately.

[darbuck]

Couldn't do the test raining all day. Might try tomorrow

[darbuck]

Just said I'd post a picture of the car so you can see it actually exists.

[MattBLancs]

There are folks who describe these hypothetical "leaks plugged by a helpful bit of sludge" that supposedly are a problem if cleared away, but I'm not sure I buy it! I think the benefits of it being cleaned out outway the potential, hypothetical, downsides.

Nice to see it, looks smart. Hope you had some success soon.

Could you isolate the PCV connection to the inlet manifold - run the connection to a catch can whilst testing - and see what changes?
I can't think where the PCV ties in, and if different between 2.0 and 2.2 HDi

[darbuck]

Sludge to me is a bad thing that if left will destroy an engine and to me It makes sense to repair It when it's off the road I just need to find what is causing the smoke.
The PCV runs from the back of the intake manifold to the intake feed for the turbo all at the rear of the engine. I tried disconnecting the PCV and ran it up to 3000 rpm and she still was smoking the same.
I also disconnected the intercooler and she was still smoking not at the same time so not definitive. It makes me wonder if there is internal issues. It was suggested to me to retorque the head bolts but to me if I have gone that far in the stripping process I would probably pull the head and reinspect the valves and cylinders.
But as you know the cylinders were perfect when last inspected unless something has changed. I think I would hear it though.
I am going to try a leak down test using my recently acquired smoke machine at the weekend. it can be used to test a lot of stuff great tool.
My compressor died so a traditional leak down test is not an option until I can replace it. I don't really want to do that until I have my garage cleaned out and accessible.
A compression test is a nightmare on these you have to remove the egr from the rear of the engine as well and for what will only give tell me what cylinder/s are in trouble. I think will wait until I get a high amp clamp for my scope to do a relative compression test.

[darbuck]

The saga continues, Definitely the new turbo leaking oil, I'm going to remove it tomorrow and send it back to Germany. I checked the Dpf for back pressure 3 to 5 mbar so not it. The oil runs out of it same as the last one at over 2000 rpm. I'm sick of this car a year and a half now.

[MattBLancs]

Sorry to hear you're still having bad luck, what an absolute pain

[darbuck]

Yeah it's just becoming a waste of time and money at this stage. The DPF has 26g of soot and is 101% clogged I wonder if this would cause increased oil pressure. There are no fault codes.

[MattBLancs]

Not an expert on this, but if the DPF readings are healthy and the "101% clogged" is just a calculated status, then perhaps worth going through the "replacement DPF" process on DiagBox (i.e. not physically changing it, but telling car it has been replaced)

I had warning messages "chance of filter blocking" etc. on my wife's 308. Seems to be about 120,000 miles is the trigger point for "please pay the dealer to fit a new DPF" messages to be triggered. It's not done huge mileage since but is fine and regenerating as normal.

However, don't think that'd cause smoke, just increased back pressure (but your DPF pressure readings are not showing that)

A puzzle. I wish you good luck, think I'm pretty patient but not sure I'd have stuck at the battle you've been put through!

[darbuck]

Hi Matt if there is back pressure in the exhaust it can cause pressure on the turbo oil seals on the compressor side and push oil past the piston ring type seal on the shaft which can cause the engine to smoke hence the direction I am going. I have found another leak at the gearbox end. I think I have a compression issue as in high crank case pressure I only resealed all of that a few months ago with elring seals and dirco. This could be related to the exhaust. I plan to power hose them and then try again. The leaks are rpm related so I think it points to exhaust or perhaps the turbo over boosting but I need to get pressure readings. I have ordered a manometer now as well. I use them in work anyway so it would be handy to have. If hadn't put as much in I would have walked sooner but I have too much time invested and I am stubborn and this is a matter of principle now.I won't let it get the better of me until I know it's unsavable

[darbuck]

Ok I have pulled the intake off the turbo which is a pain to get at. There is no play in the shaft and the wheel turns freely . The output pipe for want of a better word has some oil coating but no pooling. The pooling is on the compressor intake but not the outlet which is really weird. I think I might start a new post on this someone might have some insight.