Please what is this and whats it for/do etc....or as I suspect not doing...

[mbmb123]

The top looks like your pcv, and could cause smoking.

Be careful as upgraded 'turbo' seals don't always fit well into the original plastic air intake duct. You might break the ends off while tightening.

I thought I had the wrong seal when replacing. Turned out you have to push quite hard on the seal for it to locate into the outer plastic housing. I suspect most people, mechanics included, don't know this which results in the outer nodules being broken off and the seal not sitting right.

 

[rossy]

WOW ta....still, it wont be the cause of my issue....changed PVC for the improved one yesterday...red seals not arrived as yet....going to clean EGR right now.... Rubber gloves at the ready....

 

[mbmb123]

I haven't looked at the EGR on my Merc yet. But I did the SAAB last week.

I cleaned the gunk from the SAAB EGR, but what bothers me is that I can't clean the inside of the air manifold.
Where the EGR mates with the manifold, the tar like gunk was blocking that too.
Having cleaned the EGR I'm now thinking I've just made it easier for the gunk to get into the manifold and mess up the flaps and valves in there :-(

 

[rossy]

ML goes in tomorrow.....just praying its nowt expensive.....so so wierd as drives perfect..... would never even know it had an issue if I'd not left engine on for fear of there being a battery drain (which there isn't) Its started perfect every time since fitting new battery even last two day after scraping the ice off!
Will keep you all posted....

 

[m80]

Of interest, does this one have the DPF?

 

[rossy]

Dunno......did mean to look when I have on my ramps for the oil change....is there anyother way of knowing? I.e. DPF light on dash at ignition?

 

[m80]

No, I've not seen any dash light on the '1' motor I had with the evil thing.
You should be able to tell by exhaust state,
a familiar dirty, sooty exhaust = no DPF, but I trusted that method when I bought the DPF'd Viano and was caught out.

Now when viewing a vehicle I look for the 474 code in the VIN decode list,'and' get underneath to look for the DPF box.
The DPF on the exhaust will have 2 pressure tappings and a temperature probe.

If the VIN shows it (474) and the exhaust is w/o DPF it's been mapped out.

 

[rossy]

Just done VIN check and its would seem....no DPF......at this point if I had to guess...Stem Seals or Leaking Injector....

 

[m80]

Can't see why a dripping injector would take 15 - 20 minutes to become apparent.
Checking for crankcase over pressure might've been useful there.

 

[rossy]

Can't see why a dripping injector would take 15 - 20 minutes to become apparent.
Checking for crankcase over pressure might've been useful there.

It more a case of when driving the extra dripping diesel is simply burnt off but under idle (and bare in mind its dripping all time and not just on a comprssion stroke) it can build up in exhaust and or seep past rings and the oil level can rise...blar blar....
What do you mean buy this? Checking for crankcase over pressure might've been useful there

 

[m80]

If you have pressure escaping past the rings or the valve seals your going to see increased crankcase pressure. It may not eliminate the injector/s but makes them a secondary concern.

My Viano (642) went to an Indie after months of trying all sorts. He diagnosed injectors. Told me they can't be repaired so fitted new. £1,603 wasted. My thinking was that the ECU was doing silly things due to it having the evil DPF and never being satisfied with any regen.
My last straw with that one was when I saw evidence of crankcase over pressure, so sold it (at considerable loss) and bought the Vito (646 engine).

 

[rossy]

If rings gone would it not smoke all the time.....? With mine it literaly is next to no smoke at all unless its left 15-20mins to idle.....

 

[m80]

If rings gone would it not smoke all the time.....? With mine it literaly is next to no smoke at all unless its left 15-20mins to idle.....

Me no expert.
Rings gone and revs will, imo, mask it.
While driving and there is increased pressure in the sump / crankcase and anything blown through the breather might not be as noticable.
Stop and the build up might increase its visibility.

Just guesses.

 

[rossy]

Ok with you....does seem to be a lot of SPITTING when I remove the oil filler cap with engine running....but hope thats just down to good oil pressure up to the valves...
Guess I'll no more later...googling its certainly a common issue (Inc Jeep 3.0 CRD with shares a lot with our 3.0 CDi) but there are no "it was just this" more I had new Turbo it cured it...i had new injectors it cured it...I changed this and so on....just hope comming up to Christmas and having two 12 year old Twin Boys its summat not to expensive....

 

[rossy]

Just thinking...Valve stem seal also mensioed quite a bit....as can cause the symptoms I'm having on Petrol engines too.....could they, if gone also cause sump pressure increase....I would expect so as if oil can get past on "suck" then I'd expect exhaust gases to on "blow"?

 

[m80]

Until you blank the breather the pressure will escape. Trouble is if you do blank it and there is excess pressure it might well lift the dipstick and spew the stuff all over the engine. That's how I found out.
It's hard to understand why the 642 would be more prone to valve seal deterioratioin than other engines, but I'm open to learnings.
The time I experienced that was on a Mondeo estate I used as a property renovation load lugger. I didn't use it for a while and the dried out valve seals went brittle.

I guess any valve seals will dry out if the engine isn't run.

 

[rossy]

1st off, all the best hope all had a good Christmas...and as this will most likely not get read until 2020 Happy New year LOL !!!!

OK update....its not that great to be honest. Took ML into a local Diesel specialist that I had planed on doing a pro remap anyway with it being a ML280 and knowing its exact same engine as the ML320 I always planned to just get it pro remapped.
So dropped it off with them having told about the issue and thay basically said knowt wrong with it! They did the remap and yes there is a noticable differance in power but untill today even though I have been using it I had not let it idle for the time needed to see if issue still there.
It was quite nice today so decided to fit some "glasses" holders (one for your face) (sick of having to leave them in a the cup holder) and give it a clean.....left the engine on for a good 30 mins and the issue is defo still there!!!
Kinda wish I hadn't coz its bugging me knowing somthing is wrong.....its got the new PCV valve and I have fitted a catch tank....tho I have just ordered another with a beather on as current one does not. Ordered the new improved ORANGE inlet seals which broke the inlet "T" tube end....so had to buy the Silcone one....you basically cut the end off and the whole end is silicone pipe including the PVC pipe inlet...so mine looks like this now....(but this is not my car)

So, there is defo a little play in the turbo shaft.......so plan on changing the turbo! Theres a place around the corner from me that recon them using all EU parts....will cost £400 then get £150 back when I drop off my turbo....so did not thing that was a bad price...inc all fitting kit too.....and they will give me 2-4 weeks to get the job done.
Who thinks this is the cause?
I've read the valve stem seals going can give my issue....but every thread I read on it also says you'll get blue smoke on 1st start up and I dont get any at all.....so my thoughts and hopes are that rules out stem seals...
Piston rings I just dont think so......just dont see it could cause issue only at idle.....and on a turbo I'd expect loads on boost if it were piston rings......??????
As its getting darker earlier and having owned much older diesels I know that at night time with car behind you with lights on is the best time to see smoke from your own car...and though I cant say none at all.....to me its what I would class as normal to none....again remember we now know its a none DPF car.
Oh just remembered.....on the PCV system on some videos I watched on other cars too....theres two pipes, is that just for petrol engines i.e. pcv going to intake after throttle body and one before going to just after air box?
Only ask because so many other threads I've read up on that do have the exact issue I had it ends up being posative crank ventilation....hence new catch tank on order with little filter on top! Just wondering if there could be another pipe blocked.....
Is the valve in it shut at idle and open on throttle or other way around? Just thinking at idle if shut and if there is more crank pressure than there should be that could be it but thought all crank pressure would just go back into intake....
Arrgggg my head starting to hurt with it all .....I love the car tho so much now I had it a few months...fantastic drive quiet, its like new.....just need this sorted for peace of mind......

Sorry its a long post.......

 

[rossy]

Went out for a good run today and down huge hill.......no smoke....again read if Stem Seals it'll smoke down hill......
Really do hope Turbocharger fix's this once and for all....

 

[KeithJG]

They just knocked another £100 off so its back on.....lol so if not swirl flap what is it...come on someone must know...DONT FORGET ITS NOT IN THE POSSITION IT SHOULD BE i think its upsidedown...so maybe this?

Haven`t seen any reply to this post but it is the Glowplug Relay.....the new type looks different to the old?

The swirl motor is under the plastic "V" for the turbo intake

 

[rossy]

Not sure how we got onto glowplug relay....but it was 100% the swirl Flap Motor....I had it Coded out so not even on the car anymore.....original issue as to what the thing was is sorted....and its had new glow plugs by previous owner not that long ago....always starts on the button.....no smoke....
Just after fix now for the Smoke that happens only after a long idle of 15-20 plus....