Any Fluid Dynamics Experts?

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@v8250 are you being cruel? :rolleyes:

Does anyone know if a 200Tdi block has the turbo oil return union in the same place as the 300Tdi or is it 1/4" or so different? Clutching at finer straws now. o_O:(
 
Al2O3 said:
Bastid! :D
I'm sick of it to be honest. Think it's time to leave it on the drive for 6 months and then decide what to do with it. :rolleyes:
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Nooooooo, don't do that, it's only an engine with a heavy breathing problem...with collective thought we're bound to crack it !

Yours,
Bertie Bastid
 
v8250 said:
Nooooooo, don't do that, it's only an engine with a heavy breathing problem...with collective thought we're bound to crack it !

Yours,
Bertie Bastid
Click to expand...
I've ran out of options and ideas to be honest. I don't think it's breathing heavy. It's just being an @rse.
I could take it to the local indie, but I've sort of fallen out with them. They don't know that, but I haven't been for about two years. They changed their business model and went all posh, focussing on servicing all the new velars, evokes, discoveries etc. They always have loads outside waiting to be serviced. They hiked their parts prices up and caught me out when they first did it by charging me £76 for a set of rear brake pads. About a year later I'd calmed down :) and phoned them to see if I could buy a new turbo off them. They said they would have to get a price and call me back, but never did. Feck them :rolleyes:
 
jamesmartin said:
your return is ok as far as i can see
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I keep coming around to the problem being with the return. This all started with the engine rebuild, so you'd think it must be related to that, but no idea how. I've ran it with the breather venting to atmosphere and it still pushes oil out. There's no pressure or puffing at the oil filler cap. As far as I can think that leaves the oil going in or oil coming out. All researched sources reckon it will be a restriction in the oil return. This current pipe 'looks' fine once it's on. ie I can't see a kink in it. However, I do have to force it in to position, so it must be deforming a little bit under the stainless braid. Doesn't look it, but I can't think of anything else.
 
Al2O3 said:
I keep coming around to the problem being with the return. This all started with the engine rebuild, so you'd think it must be related to that, but no idea how. I've ran it with the breather venting to atmosphere and it still pushes oil out. There's no pressure or puffing at the oil filler cap. As far as I can think that leaves the oil going in or oil coming out. All researched sources reckon it will be a restriction in the oil return. This current pipe 'looks' fine once it's on. ie I can't see a kink in it. However, I do have to force it in to position, so it must be deforming a little bit under the stainless braid. Doesn't look it, but I can't think of anything else.
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it wont be the return its ok otherwise theyd all be the same
 
Okay, but it's only a simple engine.

If the rings, bore hone/clearance and valve seals are okay then the problem lies with the breather system itself. I'm not convinced this is a turbo issue, the engine's running over pressure at either sump, crank, cam or head/valves [providing there's no over vacuum/leak-in from the brake master cylinder]. Have just been thinking this through...does your engine have crank pressure relief at the front engine cover and at head, or just at head? An easy possible fix would be to add the vented front cover to the breather giving twin outlet. This will cause no problem as it's still balanced to atmos'.

https://www.lrworkshop.com/diagrams/land-rover-defender-engine/300tdi/engine-breather_53179

Of course this won't fix the route cause, but it would be worth adding a vented cover and if the over breathing stops you'll then know the over oiling/pressure is coming from the block.

PS my money's on piston rings, cylinder to piston/ring tolerance, valve seats, valve seals or tappets/followers

PS2 is your engine female...? If so, don't worry about this...all female's should be heavy breathers:D
 
v8250 said:
Okay, but it's only a simple engine.

If the rings, bore hone/clearance and valve seals are okay then the problem lies with the breather system itself. I'm not convinced this is a turbo issue, the engine's running over pressure at either sump, crank, cam or head/valves [providing there's no over vacuum/leak-in from the brake master cylinder]. Have just been thinking this through...does your engine have crank pressure relief at the front engine cover and at head, or just at head? An easy possible fix would be to add the vented front cover to the breather giving twin outlet. This will cause no problem as it's still balanced to atmos'.

https://www.lrworkshop.com/diagrams/land-rover-defender-engine/300tdi/engine-breather_53179

Of course this won't fix the route cause, but it would be worth adding a vented cover and if the over breathing stops you'll then know the over oiling/pressure is coming from the block.

PS my money's on piston rings, cylinder to piston/ring tolerance, valve seats, valve seals or tappets/followers

PS2 is your engine female...? If so, don't worry about this...all female's should be heavy breathers:D
Click to expand...
My engine has the block to head breather and the head to cyclone in to air intake breather, as shown in your link.
It's not puffing out of the oil filler cap hole. Could it still be pressurising the sump?
I could test it with the block breather venting to atmosphere, would that release the pressure enough to prove it's that?
Not sure about it's gender, but it's a PITA. ;)
 
Ok, I'm thinking I'm going to have to swallow my pride and take it to my very posh local Indie.

What should I ask for?

Compression test (I've done that myself, but could get a professional opinion)(haven't done it recently)
Leak down test
Crank case vacuum test
Crank case pressure test
All of these?
Anything else?
Obviously I'll say it's because there's oil coming through the turbo.
 
v8250 said:
Al, before sending to Indy how did you bed in engine and are you getting smoke out of the exhaust?
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I could put a link here to my engine rebuild thread, but I won't bore you with it. It's two horrible years long :rolleyes: Ran it hard and used Millers running in oil.

@v8250
Forgot the smoke bit.
Yes, there's a fair puff of smoke on start up. Smokes a bit when you first drive off, then looks ok when you're driving along and looking in the wing mirror. Increased speed may make it difficult to see in the wing mirror. If you stop and get out leaving it ticking over the exhaust smells a lot. Way back, when I measured the amount of oil I was putting in it was using about 250ml of oil every 200 to 300 miles, so about 1ml of oil per mile.
 
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