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Thread: Turboed Isuzu Reliability

  1. 16th April 2011, 08:22 PM #21
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    Quote Originally Posted by rovercare View Post
    So at 30psi and pre turbo @650c is a bad idea N/A lucky I have 3 Isuzu's, I was figuring that was a lifetimes supply if I lived to 100
    sure, thats fine for short durations, I wouldnt recommend it for sustained running, you'll take out the top land on the pots.
    Dave

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  2. 16th April 2011, 08:59 PM #22
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    Quote Originally Posted by Blknight.aus View Post
    sure, thats fine for short durations, I wouldnt recommend it for sustained running, you'll take out the top land on the pots.
    Will be interesting, put it all on at 299,600kms, just about 305,000 now, time will tell, I have no plans on backing it off, just bang in another donk when it melts
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  3. 16th April 2011, 09:24 PM #23
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    why?

    drop sump, pull head undo big ends pull piston, remove sleeves insert 4 more and away you go again.

    untill you push out past 50psi its normally the pistons that go and take out the sleeve and the rod.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


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  4. 16th April 2011, 09:39 PM #24
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    Quote Originally Posted by Blknight.aus View Post
    why?

    drop sump, pull head undo big ends pull piston, remove sleeves insert 4 more and away you go again.

    untill you push out past 50psi its normally the pistons that go and take out the sleeve and the rod.

    Because fitting an engine I have here will cost an oil change
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  5. 17th April 2011, 05:39 AM #25
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    I'd say let me have one of the engines after you kill it so I can rebuild it..

    But I'd like to get my hands on one before my grandchilderen are in graves.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


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  6. 17th April 2011, 04:17 PM #26
    Dougal
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    Quote Originally Posted by Blknight.aus View Post
    sure, thats fine for short durations, I wouldnt recommend it for sustained running, you'll take out the top land on the pots.

    Once you've done that, fit some Alfin pistons with steel top ring lands and that will never bother you again.
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  7. 17th April 2011, 04:56 PM #27
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    be interesting to see the next failure method after fitting them, especially if you when the whole hog and got the cast crown units....

    Quote Originally Posted by rovercare, sometime in the future
    Just when you think youve got it nailed.... does anyone know how to stop the bonnet from melting onto the exhaust manifold when you plant the boot on a 4bd1 when its running 200psi with an EGT of 1500 deg c?
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

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    Archaeoptersix 1990 6x6 dual cab(This things staying)


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  8. 17th April 2011, 06:47 PM #28
    Dougal
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    Quote Originally Posted by Blknight.aus View Post
    be interesting to see the next failure method after fitting them, especially if you when the whole hog and got the cast crown units....
    My best guess with the stock turbo type pistons (alloy with steel inserts) would be the piston crown softening, expanding and scuffing the bores. I reckon sustained 900C EGT's might do it.
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  9. 17th April 2011, 11:35 PM #29
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    Dougal you mention alfin pistons would you still run standard sleeves if lets say you was to "work" the engine?
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  10. 18th April 2011, 07:54 AM #30
    Dougal
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    Quote Originally Posted by c.h.i.e.f View Post
    Dougal you mention alfin pistons would you still run standard sleeves if lets say you was to "work" the engine?
    Yes. I wouldn't run anything except the chromard type factory cylinder liners.
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