Engine Swap Questions

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Thread: Engine Swap Questions

  1. #1
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    Engine Swap Questions

    Hi guys, I wanted to know your opinions on my idea. My thinking is that would it not be a fairly easy swap to take my 2.8l v6 out and put in a 1.8t from the same generation as mostly would it not be pretty much plug and play? hopefully either someone will put some logic in my head or have any info on whether or not this would be a decently easy swap as far as swaps go.
    Thanks!, James

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  3. #2
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    Like with anything time and money, it could be done...

    If your looking to do an easy swap, I don't think this would qualify.
    I'm not 100% sure about the transmission adaptability between 2.8's and 1.8's. So that may or may not be an issue. Others will chime in on that shortly.

    The rest,
    A different ECU would be needed. A 1.8t engine wire harness.
    Different motor mounts. Different EGR and PCV system. A completely different radiator core support with different radiator.
    Different axles would be required.
    And I'm not sure about the sub-frame, but I think that might be different also.
    And your looking at a turbo 1.8 the list gets longer with parts that would need to be added.
    The front coil springs would also have to be changed.
    The exhaust system would have to be swapped out.
    I've worked on countless 2.8 V6's and (1) 1.8t. Based on my experience and opinion, it would be easier to swap a V6 into a car that had a 1.8 in it originally.

    Why not just buy a car with 1.8t in it?

  4. #3
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    Not mention other hoses, plumbing and wiring, heat shields. I'm sure I'm over looking a few other things too.
    I tear engines out Passat's on a somewhat regular basis, this is one project I would refuse to do now that I think about it more.

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  6. #4
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    If you had a complete donor car (e.g. one that had been side-swiped), it'd be tedious, but doable I'd think. And when I say "tedious" I mean you are going to be pretty much emptying the engine bay down to bare metal and then starting the parts transfer. If you do not have a complete donor car sitting next to it, the better swap consists of "sell the V6 car , buy one with a 1.8T", because the cost of the fiddly little parts would be insane, not to mention a real PITA.

  7. #5
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    I've seen quite a few 1.8T out there while searching for a 2.8.

  8. #6
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    See posts #2 and #4 above, plus you'd be foolish to attempt a swap without a Bentley manual.

    Personally, Id ...
    ..."sell the V6 car , buy one with a 1.8T", because the cost of the fiddly little parts would be insane, not to mention a real PITA.

  9. #7
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    It's been done before : 6sp Manual Trans and 1.8T Engine Swap

    If it's a manual trans, the trans, axles and subframe stay the same. If it's a tip, the trans will bolt up, but I am not sure if the TCU will work with a new ECU. The wiring is not plug and play, but you probably could get away with just re-pinning some of the connectors.

    Radiator, a/c, p/s hoses, front support all need to be changed. A donor car makes it much easier.

  10. #8
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    Quote Originally Posted by Electron Man View Post
    you'd be foolish to attempt a swap without a Bentley manual.
    Would that really do any good? You would need at least (2) Bentleys at all times. This refers to that, that refers to this, blah blah...

  11. #9
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    Quote Originally Posted by PZ View Post
    Yeah well, some things should just never have been done, like splitting the atom.
    PZ likes this.

  12. #10
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    Seriously though, I forgot that you had done that.

    Well, there's the OP's answer. Why yes, yes it can be done.

  13. #11
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    haha thanks guys, your right, it would honestly be much easier to buy a 1.8t

  14. #12
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    i did a bunch of swaps, my 99 started off life as an auto 1.8t, then it was a manual 1.8t, then it was a manual 2.7t with a DBW swap then back to a manual 1.8t and DBC when i sold it. so ya its possible and really its not that hard.
    PZ likes this.

  15. #13
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    (GRIN) Some of us may use different values for "hard."
    AndreasPassat, PZ and sirwired like this.

  16. #14
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    that is true, but its a complete bolt in affair. other than changing the radiator, a few coolant lines, a steering line, some exhaust work its not bad if you are keeping the same tranny they all bolt up to every stock motor available on b5/.5 passats

  17. #15
    PZ
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    Quote Originally Posted by AndreasPassat View Post
    Would that really do any good? You would need at least (2) Bentleys at all times. This refers to that, that refers to this, blah blah...
    Apart from possible wiring, if you need the Bentley, you will not be able to do the job.
    AndreasPassat likes this.

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