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Thread: Burning oil downhill.

  1. #1
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    Burning oil downhill.


    TransAmDan's Avatar
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    Burning oil downhill.

    Okay so on last club night we went on a cruise, someone mentioned when I was going down hill they saw blue smoke from my pipes.

    Last Sunday going downhill again someone else mentioned the blue smoke.

    Well I know about burning oil up hill as it leaks out the back of the sump, so that's okay, but down hill got me thinking.

    Going downhill I use gears to control speed so I'm not on the brakes like auto's. So this is putting the intake in a vacuum, sucking oil vapour from the heads. This gets collected in the oil catch can. Hang on when did I last check that, gotta be 6months.
    Burning oil downhill.-imag1571.jpg
    Oh dear, it's full, that would explain things, enough vacuum is pulling oil into the intake and burning it.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

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    Burning oil downhill.


    saleen 192's Avatar
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    Like the use of electrical tape

    what the open pipe in the back of picture for looks a tad rusty?
    Upgrades = Saleen supercharger kit with JDM tune, 3.4 pulley , keene bell boost a pump , 62mm Twin Throttle body with spacer, EBC drilled grooved vented discs up front with red stuff pads all round , Boost gauge and Fuel psi gauge ,oil seperator, Additional cooling fans for heat exchanger, 7 row oil cooler BMR rear lower control arms. Exedy stage 1 clutch kit. 481Bhp total. Plus all the normal refinements you get with a saleen mustang production number 192 of 945 for that year.. New PB at santa pod 12.75sec 1/4 mile
    See xmas toy project in readers rides for my 79 Trans Am on going project , In my stable is a 2005 saleen mustang 79 Trans am 69 Chevy El camino what's next to add???

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    Burning oil downhill.


    TransAmDan's Avatar
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    Quote Originally Posted by saleen 192 View Post
    Like the use of electrical tape

    what the open pipe in the back of picture for looks a tad rusty?
    Not rust that intake is plastic. That is where the catch can gets connected to. Insulation tape was mainly to test for vacuum leaks, I'll make that one pipe between the intake and catch can.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

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    TransAmDan's Avatar
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    Went out for a little drive and data logging. Looking at full throttle between 3000 and 5500 rpm thr fuel delivery looks spot on still. A few things I may need to tweak, like when cold it's open loop it's need more fuel on pulling away.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

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    Burning oil downhill.


    saleen 192's Avatar
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    Have you also checked plugs see if foulled up as well. And oil level in engine?
    Upgrades = Saleen supercharger kit with JDM tune, 3.4 pulley , keene bell boost a pump , 62mm Twin Throttle body with spacer, EBC drilled grooved vented discs up front with red stuff pads all round , Boost gauge and Fuel psi gauge ,oil seperator, Additional cooling fans for heat exchanger, 7 row oil cooler BMR rear lower control arms. Exedy stage 1 clutch kit. 481Bhp total. Plus all the normal refinements you get with a saleen mustang production number 192 of 945 for that year.. New PB at santa pod 12.75sec 1/4 mile
    See xmas toy project in readers rides for my 79 Trans Am on going project , In my stable is a 2005 saleen mustang 79 Trans am 69 Chevy El camino what's next to add???

  6. #6
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    Burning oil downhill.


    TransAmDan's Avatar
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    Quote Originally Posted by saleen 192 View Post
    Have you also checked plugs see if foulled up as well. And oil level in engine?
    I check oil level with every trip. Just over 3/4's full which will be enough for Worthing tomorrow. Plugs seem to fire okay, but not taking them out.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

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    So how is the oil leak?
    Refresh my memory, where I it coming from?

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    TransAmDan's Avatar
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    Oil loss is good, and manageable.

    Symptoms are when going up hill, and my window is open a crack I have smoke coming in the car through the gearbox tunnel, very little but you can smell oil, it dosn't do it on every hill.

    Checking the block under the car, there is no visible oil, everywhere feels dry, no drips on the floor. The transmission may have a light residue of oil at the bottom.

    Conclusion, oil getting out the back of the engine, either though the back of the sump or main seal. Oil maybe hitting back of flywheel and turning to smoke. Its not visible without taking the gearbox and flywheel off.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

  9. #9
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    AmericanThunder's Avatar
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    The last two sump bolts around where the crank exits, are not dry bolts. As in they tap into the oil galleries. You did put sealant on them?

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    TransAmDan's Avatar
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    It may be something like that. I know we were careful of any holes that were not blind, but maybe we missed something. Thanks for the idea.

    The plan is to whip out the engine at some point. As then I can seal the sump, and get to the back of the block.

    2000 Trans-Am WS6 LS1 M6. (The Bat)
    Corsa Cat back, 3.5" dual tips. F.A.S.T LSX Intake / F.A.S.T Fuel rails, Dynatech LT Headers / Y-Pipe / No Cats, Wisper Lid, ported MAF, Racetronix 42lb/hr fuel injectors. Hypertech 160 stat. !AIR, !EGR. Walbro 255, SPEC Stage II Clutch / Flywheel. HPTuners 1BAR SD Tune. Wide Band gauge.
    389RWHP/380RWTQ ([477HP/460TQ]Flywheel) Dyno Dynamics

    More info and photos at:-
    http://www.solent-renegades.co.uk/co...-trans-am.html

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