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Thread: What is this tee’d off the air intake?

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    Travelling Podologist Cuppa's Avatar
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    What is this tee’d off the air intake?

    On a Nissan Civilian 4 cylinder diesel. I think it is a standard fitting because I’m pretty sure we had the same thing on our bus (without the tape. )

    It is tee’d off the air intake between the air filter & the motor.

    Can anyone tell me what it is/what it’s purpose might be?


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    Patrol God nissannewby's Avatar
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    Is it turbo?

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    Some sort of a resonator box ??
    2005 TD42TI

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    Administrator AB's Avatar
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    A similar thing was on my td42 NA before I did the turbo. I asked Tony Ynot back then and he had no idea?
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    Patrol God nissannewby's Avatar
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    If it is what andy has this will normally be an indicator for the air filter. In that location it will not work as required with a turbo.

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    Quote Originally Posted by nissannewby View Post
    If it is what andy has this will normally be an indicator for the air filter. In that location it will not work as required with a turbo.
    like a sensor to tell you when the air filter needs changing?

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    Travelling Podologist Cuppa's Avatar
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    Normally aspirated/non turbo ED33 motor (3.3 litre 4 cylinder as used in Civilians & Nissan Cabstar trucks).
    What would a ‘resonator box’ do?
    If an ‘indicator’ for the air filter what would it actually indicate? There are no wires connected to it.

    I wondered if, because the air filter is mounted fairly low (behind the passenger side headlight) whethe it might be some sort of extra protection should water get sucked in, but if that were so I would expect the t connection to point down rather than being horizontal.
    Last edited by Cuppa; 23rd June 2015 at 10:13 PM.

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    Patrol God nissannewby's Avatar
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    Quote Originally Posted by AB View Post
    like a sensor to tell you when the air filter needs changing?
    Yep. Clogging indicator.

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    I don’t think the Civilian one is a clogging indicator - it is a plain looking canister with no mechanical indicator mechanism & no wires attached to send a signal to a dash light..... unless it has some form of operation I haven’t considered? I’ve looked through the workshop manual & can find no reference to this thing.

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    Patrol God nissannewby's Avatar
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    What is under the tape?

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