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Thread: 4BD1T Engine problems,help needed!

  1. #31
    Join Date
    Sep 2007
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    Quote Originally Posted by Adrian18 View Post
    Got the valves gound and the head skimed .pistons were fine bore still had hone markes in it ... if the valves are leaking at all diesels will never run well
    How are the valve guides?

  2. #32
    Adrian18 Guest
    The guides were replaced as well ...forget ....trying to forget the whole thing actually but thats another story

  3. #33
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    Jun 2012
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    Thread resurrection alert!!!!
    Eventually got the time to pull the injectors out and test them.
    All 4 tested fine, no dribbles, opened at correct pressure. So on to something else!
    The tips were a bit sooty and the exhaust is also.
    May be time to try a turbo!

  4. #34
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    Jun 2012
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    So I'm thinking of going for the TB2568 turbo.
    My reasons are,
    Readily available in the UK and not bad price
    Performance upgrade on the original
    Only the down pipe to make, no messing with manifold or adapters

    Sensible option do you think, or should I be looking at something else?
    Thanks

  5. #35
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    Quote Originally Posted by gwac110 View Post
    So I'm thinking of going for the TB2568 turbo.
    My reasons are,
    Readily available in the UK and not bad price
    Performance upgrade on the original
    Only the down pipe to make, no messing with manifold or adapters

    Sensible option do you think, or should I be looking at something else?
    Thanks
    This is the factory 4bd2t turbo. It won't set your world on fire, but it'll work well and bolt straight on.

  6. #36
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    Jun 2012
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    I know it's a bit of a compromise and not ideal but can't find and really can't afford anything better like the GT2259 or HE221!
    Just hoping it cures the power issues.

  7. #37
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    Jun 2012
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    Lincoln,UK
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    So before buying a new turbo I thought I would fit a boost gauge to see how the old turbo performs.
    So when accelerating at normal speed it runs about 4-5 psi when working hard it tops out at 9 psi and drops off if left at max rpm.
    I haven't got an egt gauge fitted yet so no temp to go by.

  8. #38
    Join Date
    Jan 1970
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    Yinnar South, Vic
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    Wire the wastegate shut and

    Wind out the fuel screw some more!

  9. #39
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    Sep 2007
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    Aussie Expat in NZ
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    Quote Originally Posted by rovercare View Post
    Wire the wastegate shut and

    Wind out the fuel screw some more!
    ^^what he said
    Hercules: 1986 110 Isuzu 3.9 (4BD1-T)
    Brutus: 1969 109 ExMil 2a FFT (loved and lost)

  10. #40
    Join Date
    Jun 2012
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    Don't have that option though! It's got the free floating turbo.
    Plus it also chucks out a lot of black smoke anyway.

    To sum it all up,
    When engine starts from cold it produces a lot of grey smoke and runs lumpy for awhile. When warm it's starts fine with no issues.
    Seems to have enough power when driving on the flat road but when you hit a hill it slows down a lot and power drops off, black smokes quite a lot.
    Check compression, all ok.
    Check injectors, all ok.
    Check turbo, results above.
    Might be valve seals leaking, Giving cold starting issues?
    Engine just doesn't sound crisp when revving.
    Any ideas? !!!

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