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Thread: To much oil pressure for tubro?

  1. 1st February 2014, 06:21 PM #1
    HotWired's Avatar
    HotWired
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    To much oil pressure for tubro?

    Hey all,

    So finally got turbo and exhaust sorted. Took it for a run, and it was blowing alot of smoke! Pulled the exhaust off and found alot of oil, there did look to be much in the manifold when I peeked through the wastegate. Its a T25 turbo I got off eBay which I put a rebuild kit through. Turbo oil is fed from side of dual filters, and drain line drains into the tappet cover.

    No the drain hose does have a small kink in it, could this cause the problem?

    Does anyone run oil restrictor to there turbo? Could there be to much pressure?

    Hopefully someone can help

    Sean
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  2. 1st February 2014, 06:36 PM #2
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    steveG
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    I'd put money on it being a drain issue. Particularly if the drain hose is kinked.
    I think the standard banjo bolt for a T25 journal bearing turbo has a 1.6mm hole in it.
    Of the "my new turbo is ****ing out oil" threads on here I can't recall any that turned out to be pressure related. IIRC all were drain issues.

    Steve
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  3. 1st February 2014, 06:38 PM #3
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    HotWired
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    Thanks for the quick reply. I'll get that fixed and see how it goes. Will I need to put in seals through turbo?
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  4. 1st February 2014, 07:32 PM #4
    Ancient Mariner
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    Tappet cover ? the drain should be as vertical as possible low down

    AM
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  5. 1st February 2014, 08:12 PM #5
    Dougal
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    Quote Originally Posted by HotWired View Post
    Thanks for the quick reply. I'll get that fixed and see how it goes. Will I need to put in seals through turbo?
    No seals needed. But it may take a few miles to get the oil out the turbo once you fix the drain.
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  6. 1st February 2014, 08:13 PM #6
    Graeme
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    Chinese copies often don't have the inbuilt oil supply restrictor that Garrets have. Banjo bolts with the correct size hole to restrict the oil supply can be readily bought.

    Edit: My son thought his new turbo was a dud until he discovered the lack of a restrictor in the replacement.
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  7. 1st February 2014, 08:17 PM #7
    Graeme
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    Quote Originally Posted by Ancient Mariner View Post
    Tappet cover ? the drain should be as vertical as possible low down
    and never uphill!
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  8. 1st February 2014, 08:35 PM #8
    Ancient Mariner
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    Maybe a Tubro should drain into a Tub( Sorry)
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  9. 2nd February 2014, 06:53 AM #9
    Bush65
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    Tappets run on the cam and the tappet covers for a 4BD1 are on the side of the block below the turbo.

    Ideally the turbo drain would be lower, but .....
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  10. 2nd February 2014, 03:42 PM #10
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    FWIW I observed my turbo leaking a tiny bit of oil when I first started up (half a tea-spoon or so) but it disappeared quickly (seconds). My assumption is that before thermal expansion the shaft clearances allow a small amount to leak.

    I was a little concerned when I first started it up after fitting but after checking everything several times and then running it sans-exhaust I found out that it was fine.

    Regardless, the turbo drain should be as close to vertical as possible, of the correct size and without sharp bends or restrictions..
    Hercules: 1986 110 Isuzu 3.9 (4BD1-T)
    Brutus: 1969 109 ExMil 2a FFT (loved and lost)
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