My Golf Project
- Thread starter L1J
- Start date
Right Llyr,
You've got me looking over the internet for answers and I found a forum which seems to have the same problem. There seems to be a common fault with these engines.
http://forums.vwvortex.com/zerothread?id=3208100
They have replaced various parts to try and combat the issue. It might work for you or i'm sure you could fabricate a solution.
Fisrt post by the way. Alan
You've got me looking over the internet for answers and I found a forum which seems to have the same problem. There seems to be a common fault with these engines.
http://forums.vwvortex.com/zerothread?id=3208100
They have replaced various parts to try and combat the issue. It might work for you or i'm sure you could fabricate a solution.
Fisrt post by the way. Alan
Soldato
- Joined
- 10 Oct 2006
- Posts
- 3,637
Jordan73 said:
Its not a common fault for them to bellow blue smoke. Generally speaking the 1.8T is very a solid engine, the turbos are also pretty reliable however particulary when remapped they need to be warmed up and colded down. From the symptoms that have been described it sounds like the oil seals are faulty on the turbo could be a couple of other things however the compression test looks fine. First port of call for me would be the turbo, surprising considering its brand new however.
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L1J said:
Sorry, I meant the valve stem seals. Also the compression rings might be fine but the oil control rings might be buggered, but I doubt that would be the case.
I also forgot that you bought a new turbo for it so double bad luck really. Hope it all goes better with the old turbo on it.
L1J said:What a ******* day
Car is producing lots of blue smoke when revved, changed the oil (5W40 Fully synthetic) and it's still the same. Compression on all cylinders are just under 12 bar. Breathers are fine.
Plugs are black, I've stuck a new set in and left it running to see how they come out.
The only thing left I can think of is the turbo?
Anyone have any thought? Second opinions would be good at the moment!
I'm off to buy some thicker oil just in case.
******* cars
common problem when you add larger turbos, they only have a stepped gap seal for the oil on most turbos so you NEED to put a oil feed restricter in the oil line.
the oil in a turbo is only splash bath not pressure/spray feed, without a restrictor your boshing in 4-8 bar+ of oil into a turbo thats only desined to take 1-2 bar MAX. Coupled to this your oil drain should be at LEAST 2x the diameter of the feed pipe (16mm- 5/8" is a good size) oil should drain freely, to aid with free draining the oil drain must go back into the engine above the oil level. As soon as you start pressuring the oil in the turbo you'll start blowing it through the seals.
This is the most common cause for "seal failure" where in all honesty its just poor installation.
an oil feed restirctor is basically a union with just a tiny 1.5-2mm hole in so your not ramming 8mm pipe worth of oil into the turbo at 4bar+ while the engine is at revs. they work very well and stop such problems.
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Malachy said:
Turbo is not "bigger" as such it's a standard fit VW item with the standard feed and return lines so I'm just replicating EXACTLY the factory setup of something like a Skoda Octavia VRS, Leon Cupra, Golf Anni etc etc
Further investigation this morning led to this:
Throtle body inlet:
Brand new plugs after about 3 hours running
Inlet path is free of oil so turbo isn't leaking on the inlet side, plugs are covered in oil so I thinking oil control rings on the pistons more than anything?
Have I missed anything obvious here?
Engine will have to come out for a strip down I think, luckily I have 2 spare 8V engines here. One is going in so I can go to the 'ring a week Monday!
To be honest it's a bit wierd that all four cylinders are showing similar oiling which still makes me think that it's oil in the inlet air rather than either Valve stem seals or oil control rings. I'm not saying it isn't the case that the oil control rings/stem seals are gone but I'm my experience, which granted isn't 100's of engines, valve stem seals or oil control rings go one at a time - to get all four to like that would be strange IMO.
Have you looked into the turbo itself around the compressor fans?
//edit, As a test I would still test the old turbo on the car as the alternatives are a lot of work.
Have you looked into the turbo itself around the compressor fans?
//edit, As a test I would still test the old turbo on the car as the alternatives are a lot of work.
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Conanius said:does this mean you wont be running on the RR day !!
I will be doing my best to get it there! Put me as the last runner!
hominid said:
I agree that it's strange.
There's no puff of smoke when it's first started, and it only smokes when revved.
Turbo inlet and outlet are clean:
Hot side is covered in an oily film
Old turbo should be on soon.
L1J said:Old turbo fitted and no different, still smoking.
Engine is coming out tonight....
Ah well, I work better under pressure!
Your determination through all of this, including this little hiccup is quite frankly astonishing.
I probably sound like a total noob (thats cos i am) but i had the same problem years ago with my MK2 golf tour. Think it turned out to be the timing was out. Had the same symptoms i.e. smoke from exhuast, spark plugs turning black with soot quicky. Could this also be down to mapping?
L1J said:
That sounds more like valve stem seals to me than oil control rings, but agreed it could still be either. The thing that sways it for me is that you say there is no smoke when started and it takes time for the oil to get to the top of the engine.
I do hope it's that as it's the easiest fix, I'll keep my fingers crossed.
Kingy, you can normally tell by the colour of the smoke: white=water, blue=oil, black(sooty)=fuel.
Bloody hell that is oily on the hot side isn't it?
Compression is high so I think you can rule out rings, plus I'd be really surprised if all 4 rings "went" at once, it's normally only one that goes.
Valve stem oil seals are the likely suspect, but surely they'd have to be seriously buggered for it to have oiled up that fast? I've got a 180k Pug GTI head on the original seals that smokes on startup but when I whipped off the manifolds the oiling is nothing like what you're getting there.
I take it you've checked all the breathers etc? No dodgy oil feeds on the turbo at all?
Compression is high so I think you can rule out rings, plus I'd be really surprised if all 4 rings "went" at once, it's normally only one that goes.
Valve stem oil seals are the likely suspect, but surely they'd have to be seriously buggered for it to have oiled up that fast? I've got a 180k Pug GTI head on the original seals that smokes on startup but when I whipped off the manifolds the oiling is nothing like what you're getting there.
I take it you've checked all the breathers etc? No dodgy oil feeds on the turbo at all?
