Diablo Posted November 10, 2013 Share Posted November 10, 2013 Ever since the new engine and turbo last christmas I've had a spray of oil from the air outlet side of the turbo, which proceeds to spray all over the bonnet and engine bay. I managed to adjust the jubilee clip a bit better to reduce the amount coming out, but it still does. How can I seal the joint properly - I presume something like exhaust sealant isn't suitable? I've marked on the picture below where it comes out - I had just wiped the turbine house before taking the pic so it does look a bit clean. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 10, 2013 Share Posted November 10, 2013 Hang on...that's the air outlet side from the turbo to the intercooler isn't it? You shouldn't be getting any oil spraying out of there at all. Have you checked the vane shaft in the turbo? Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 10, 2013 Author Share Posted November 10, 2013 I did wonder. No I haven't checked that. Turbo was rebuilt last year, so I presumed a little oil out of there was correct Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 11, 2013 Author Share Posted November 11, 2013 Think I'll give the place that rebuilt it a ring at lunchtime, see what they say. Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 11, 2013 Author Share Posted November 11, 2013 They've given a host of possibilities, the only one of which, bar the turbo seals, which I can think may be an issue is the breather system for the engine. When I replaced the engine/turbo last year, I did give everything a good clean out, but the thing I couldn't quite work out was how to get the oil separator apart (the small plastic 'box' next to the rocker cover). Is it possible, or do you need a new one in order to get a 'clean' one? This is a Defender 200tdi Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 11, 2013 Share Posted November 11, 2013 If its breathing oil so much that it can spray it all over the engine bay then I'd say you've got problems. How much oil is it using? Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 11, 2013 Author Share Posted November 11, 2013 Not masses - about 1/4 to 1/2 a cupful (not very scientific I know) every couple of months I would guess. Maybe a bit less. Runs like a dream though (as it should do, being 10 months old), it's just this oil spraying onto the bonnet/engine bay. and at night, with lights behind you, you can just see smoke when putting the accelerator on after idling - which I presume is the 'build up' of oil. Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 11, 2013 Author Share Posted November 11, 2013 Here's a pic taken tonight, after approx 30 miles of driving. Took the breather hose off the airbox and there was a noticeable amount of oil in it. Interestingly there are a couple of oil runs around the rocket gasket, so I wonder if the cyclone breather isn't breathing properly? Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 12, 2013 Share Posted November 12, 2013 Two bolts hold it to the side of the head, and an O ring to seal it. I'm not sure it does come apart, replace if you're worried. Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 21, 2013 Author Share Posted November 21, 2013 Took everything off at the weekend and there was oil everywhere. Clearly the cyclonic separator wasn't separating. Gave everything a decent wash out with paraffin, today was first trip since weekend, so shall get it apart tomorrow and see what the hoses look like. Quote Link to comment Share on other sites More sharing options...
western Posted November 21, 2013 Share Posted November 21, 2013 They've given a host of possibilities, the only one of which, bar the turbo seals, which I can think may be an issue is the breather system for the engine. When I replaced the engine/turbo last year, I did give everything a good clean out, but the thing I couldn't quite work out was how to get the oil separator apart (the small plastic 'box' next to the rocker cover). Is it possible, or do you need a new one in order to get a 'clean' one? This is a Defender 200tdi the cyclonic breather unit isn't meant to be dismantled, just clean it in a suitable fluid to get any old excess lumps of oil out of it & blow it dry, it can be replaced as a complete unit. Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 22, 2013 Author Share Posted November 22, 2013 Did that at the weekend, gave it a thorough wash in paraffin and a decent dry out. Looked under bonnet today and the oil is back in its usual place - all over the bonnet. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 22, 2013 Share Posted November 22, 2013 Hmm.... Did you check the turbo shaft? Have you run the engine with the pipe from the breather disconnected? A small amount of oil that's atomised can spread a long way. Quote Link to comment Share on other sites More sharing options...
Diablo Posted November 22, 2013 Author Share Posted November 22, 2013 Turbo shaft is fine - as it should be No I haven't - probably well worth doing. Should probably hook it into a pot or something to catch the oil Quote Link to comment Share on other sites More sharing options...
Diablo Posted December 4, 2013 Author Share Posted December 4, 2013 FWIW I replaced the breather today with a new genuine one. Cut the old one open for fun, and everything looked fine, so time shall tell, though I'm not fully convinced. Note that, as rumoured by many, there is no gauze in these things Quote Link to comment Share on other sites More sharing options...
ejparrott Posted December 4, 2013 Share Posted December 4, 2013 Well at least we know what's inside now! Quote Link to comment Share on other sites More sharing options...
Diablo Posted December 5, 2013 Author Share Posted December 5, 2013 Indeed, read so many 'facts' about what they're like, figured I might as well set the record straight! The 'stuff' (ie oil/air mix) comes in from the engine, swirls around the outside of the pot. Oil in theory drains out of the bottom, whilst the air goes up the tube in the middle and out the pipe from there. Not sure what the spring is all about though? Quote Link to comment Share on other sites More sharing options...
Diablo Posted February 12, 2014 Author Share Posted February 12, 2014 Still pissing out oil at a rate of knots Not sure what the next avenue to go down is - Turners said it may be linked with the fueling - didn't quite get that one though? There's a few small leaks around the rocker cover gasket too, so it appears to my naive eye, that the engine is breathing rather heavily, though the reasons behind that I'm not sure. Quote Link to comment Share on other sites More sharing options...
Maverik Posted February 12, 2014 Share Posted February 12, 2014 The breather attachment to the air filter isn't so critical. to test, I'd just disconnect the breather from the air filter and maybe make a wee catch tank or something, but make it nice and tidy, then block the wee hole in the air filter housing, clean up the turb and run it for a bit, maybe 100-200 miles, keep checking and cleaning to see if the oil goes away - that would rule out the brather (if you haven't already)... Now the only other logical place for oil to come from is the main turbo shaft seal OR the alu compressor side of the turbo isn't properly seated onto the turbo "cartridge" centre peice and under pressure its pushing oil out and spraying it around, I'd be onto the folk that re-built the turbo and be asking for a replacement unit, as I think its faulty. I've been involved with the re-build of slightly bigger turbo's before and it doesn't take much for them to not be right if mating surfaces etc aren't cleanned and prepared properly... I hope its still under some kind of warranty... An after thought after looking at your pictures again... did you use new copper sealing washers on the banjo fitting for the turbocharger high pressure oil feed (top oil supply pipe)?... and just had another thought... you could maybe use kitchen foil wrapped around certain parts to maybe localise the precise point at which oil is being released... ... and on the topic of your rocker gasket... they are renowendly bad at sealing so I wouldn't put it too much down to "heavy breathing" more just a bad application of a sealing mechanism. Quote Link to comment Share on other sites More sharing options...
western Posted February 12, 2014 Share Posted February 12, 2014 when was the intercooler last cleaned, it see's all the oil mist not burnt by the engine breather system. Quote Link to comment Share on other sites More sharing options...
Diablo Posted February 13, 2014 Author Share Posted February 13, 2014 thanks to both for your help Intercooler was cleaned when the new engine went in - December 12. i'm sure it's full up again now, but not worth cleaning whilst the problem still exists. Mav: new washers were used and I guess you're right re: the rocker. as for the oil - it is being released from the hose on the turbo output side. Obviously this should be properly sealed, but currently it reminds me that oil is leaking! Have checked all the oil pipes a couple of times and they're fine. And they're also on the wrong trajectory. I guess it makes sense to stick the hose in a catch tank to rule in/out the engine/turbo and then go from there. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted February 13, 2014 Share Posted February 13, 2014 Clean it up properly and find out exactly where it is coming from. The pictures do not look like the turbo discharge air hose. It looks more likely like a leak in one of the turbo oil hoses. Clean, then run for a few minutes and find where it is coming from. Don't wait until it is all dirty. Quote Link to comment Share on other sites More sharing options...
Diablo Posted February 14, 2014 Author Share Posted February 14, 2014 It is hard to get a picture that shows it well. when I replaced the cyclone breather, I cleaned everything out - the hose to the air box, and the pool of oil in the air box. Once this was done, with the new breather, the oil spray stopped for a week or two - presumably whilst it 'filled up' again - this to me suggests that it is less likely that it is the turbo - the external hoses anyway. Once the MOT is out of the way, I'll stick the breather hose in a bottle for a few 100 miles, then see what things look like. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted February 14, 2014 Share Posted February 14, 2014 I'm sorry, but what does the crankcase vent system have to do with an external leak? Something is leaking and you need to fix that. Quote Link to comment Share on other sites More sharing options...
Diablo Posted February 14, 2014 Author Share Posted February 14, 2014 Oil leaks down the pipe into airbox. Air is then sucked through turbo, from airbox, collecting some oil with it. due to the slight leak on the output hose, some of this oil gets blasted at the bonnet, the rest goes into intercooler/engine and burnt off. That's my current theory; the only external leak is the air hose. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.