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Re: The oil smoke blues |
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Guest_
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sounds like your getting somewhere, its one of those have to see problems almost now.
When you say smokes, is it out the exhaust or from under bonnet. If out of exhaust, what colour, also atf will smell terrible burning, not like motor oil at all.
sounds like may not have needed a one way valve from stock but now boosted might need one in there, not sure how this affects your shifting though.
Posted on: 2008/3/3 5:15
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Re: The oil smoke blues |
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No life (a.k.a. DattoMaster)  
Joined:
2004/5/4 8:32
From Canberra
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Registered Users
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vacuum for the auto shouldnt be different from N/A to turbo should it? A 1-way valve wouldnt help as the turbo produces positive pressures and would push oil away from the manifold rather than into it. yes? no?
Posted on: 2008/3/3 5:25
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_________________
Recommend trading with: gx5, wardat, dat141, datwags, boofhead, PIGDOG, MYORGZM, sssute, Ronald, beattie, dodgeman, dog160, LAGWAGON, Whitesedan, DamienS, simmos_datto, Team
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Re: The oil smoke blues |
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Just can't stay away  
Joined:
2003/9/5 6:51
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yeah im clutching at straws at this stage
when i did the conversion i just removed everything and didnt take too much consideration into it .
yeah i dont think a one way valve is the answer cause it still will pull vacuum from the trans and ATF.
Maybe somthing is rooted in the auto, maybe boost may have done somthing to the auto?
I might set up a sealed catch can arrangment and see how it goes from there.
But your right there should be no differane between N/A and Forced induction?
Posted on: 2008/3/3 5:37
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_________________
Jesus drove a datsun  `67 B10 Turbo white `69 VB10 red `71 S30 (240z) orange 432R style `78 P330 (280c) president matte black `76 p330 (260c) wagon silver `96 Toyota Hiace 2.8 diesel LWB
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Re: The oil smoke blues |
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No life (a.k.a. DattoMaster) Joined:
2004/5/4 8:32
From Canberra
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Registered Users
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My mate's fj20 has a similar problem, blows heaps of smoke and is losing oil through one cylinder but holds compression. He's pretty sure its an oil scraper ring.
Posted on: 2008/3/3 5:41
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_________________
Recommend trading with: gx5, wardat, dat141, datwags, boofhead, PIGDOG, MYORGZM, sssute, Ronald, beattie, dodgeman, dog160, LAGWAGON, Whitesedan, DamienS, simmos_datto, Team
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Re: The oil smoke blues |
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Just can't stay away Joined:
2003/9/5 6:51
Group:
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As i say im clutching at straws at this stage
the motor was fine before the conversion (one owner 170,000k`s grandpa spec alittle thirsty but no big time smoker) and the car pulls like 14 yr old schoolboy, with no smoke untili get on the throttle after 30 sec+ off thottle ( downhill run)
Its pissing down with rain now so i cant do too much too the car, so ill wait to see if anyone else has any ideas? and have another go on the morrow.
Posted on: 2008/3/3 5:52
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_________________
Jesus drove a datsun `67 B10 Turbo white `69 VB10 red `71 S30 (240z) orange 432R style `78 P330 (280c) president matte black `76 p330 (260c) wagon silver `96 Toyota Hiace 2.8 diesel LWB
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Re: The oil smoke blues |
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No life (a.k.a. DattoMaster) 
Joined:
2003/6/27 14:53
From Southern Tablelands N.S.W. Australia
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The vacuum line goes to a modulator valve on the trans.
This valve, in conjunction with the transmission govornor determines when the upshift or downshift should occur.
You have now pressurised this valve when under boost & in all likleyhood damaged it, allowing oil to be sucked into No'6 when off boost.
If you have a suckthrough system [I'm too lazy to go back for a look] then run this line to the intake side of the turbo after replacing the vacuum modulator valve with an adjustable one so that you can at least make an attempt to tailor your shift points.
If you have a blowthrough system then I can't think of anyplace to run the vacuum line that sees only atmospheric pressure as a maximum.
Posted on: 2008/3/3 6:42
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Love your Datsun.
Treat it well.
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Re: The oil smoke blues |
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Just can't stay away Joined:
2003/9/5 6:51
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Registered Users
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Thankyou you Dodgeman, you are truly an oracle of all things datsun.
Yes I have a draw thru system same as my a15 in my 1000
It indeed seems like i have damaged this modulator valve with boost pressure.
On the dodge side of things, years ago my mate took me for a ride in his dodge ute (aka valiant ute) 265 hemi triple side draughts, cam, stractors, Very fast.......220kph+. this was truly a work-horse,
gotta have respect for all things hemi.
Posted on: 2008/3/3 7:18
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_________________
Jesus drove a datsun `67 B10 Turbo white `69 VB10 red `71 S30 (240z) orange 432R style `78 P330 (280c) president matte black `76 p330 (260c) wagon silver `96 Toyota Hiace 2.8 diesel LWB
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Re: The oil smoke blues |
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Just can't stay away Joined:
2003/9/5 6:51
Group:
Registered Users
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So, if it`s ATF that is causing the smoke, and i replace the modulator valve, where do you think i should hook it up to?
Im thinking between the carb and turbo, as this is the only part of the inlet that gets vacuum, but not boost?
Posted on: 2008/3/3 7:25
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_________________
Jesus drove a datsun `67 B10 Turbo white `69 VB10 red `71 S30 (240z) orange 432R style `78 P330 (280c) president matte black `76 p330 (260c) wagon silver `96 Toyota Hiace 2.8 diesel LWB
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Re: The oil smoke blues |
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Just can't stay away Joined:
2003/9/5 6:51
Group:
Registered Users
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 I hooked this dodgie sealed catch can between the inlet and the auto, I did my usual road test (5 km up / 5km down) and it seems to have stopped the smoking problem, how ever iv collected a reasonable amount of ATF in the catch can. so it would seem the smoke is coming from the auto and not the rings, valves. But iv still got to pull the plugs to confirm this.
Posted on: 2008/3/3 8:47
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_________________
Jesus drove a datsun `67 B10 Turbo white `69 VB10 red `71 S30 (240z) orange 432R style `78 P330 (280c) president matte black `76 p330 (260c) wagon silver `96 Toyota Hiace 2.8 diesel LWB
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Re: The oil smoke blues |
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No life (a.k.a. DattoMaster) Joined:
2003/6/27 14:53
From Southern Tablelands N.S.W. Australia
Group:
Registered Users
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Quote:
datsonovic wrote:
So, if it`s ATF that is causing the smoke, and i replace the modulator valve, where do you think i should hook it up to?
Im thinking between the carb and turbo, as this is the only part of the inlet that gets vacuum, but not boost?
Read the fourth sentence.[below] Quote:
Dodgeman wrote:
The vacuum line goes to a modulator valve on the trans.
This valve, in conjunction with the transmission govornor determines when the upshift or downshift should occur.
You have now pressurised this valve when under boost & in all likleyhood damaged it, allowing oil to be sucked into No'6 when off boost.
If you have a suckthrough system [I'm too lazy to go back for a look] then run this line to the intake side of the turbo after replacing the vacuum modulator valve with an adjustable one so that you can at least make an attempt to tailor your shift points.
If you have a blowthrough system then I can't think of anyplace to run the vacuum line that sees only atmospheric pressure as a maximum.
When the vacuum line was connected to the trans, you had smoke, .... when the vacuum line was connected to the catch can, there is no smoke but a quantity of liquid oil in the jar. Don't bother with the spark plugs, you found the problem.
Posted on: 2008/3/3 9:13
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Treat it well.
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