Weight different between XU alloy & iron blocks?

Discussion in 'General Motoring' started by Chris B, Apr 27, 2004.

  1. Chris B

    Chris B Guest

    Anyone know how much heavier the iron XU blocks are compared to the alloy
    ones? It seems like most/all 1998cc XU engines are iron blocks - such as the
    Citroen XM's 2 litre turbo engine, or the 2 litre 16v engine fitted to later
    405's. Just wondering what I could expect to happen if I had a heavier block
    than my current 1905cc alloy engine.

    Yes, I'm *still* deciding what to do with my 305 engine and exactly how mad
    I should go - all the while driving it to work every morning with an
    alarming ticking noise worsening as the days go by.

    Chris B, Apr 27, 2004
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  2. Chris B

    G.T Guest

    No clue.
    Post-93 XUs (XU8-XU10) are iron blocks, possibly to comply with noise rules.
    They also came with a catalyzer and you may need a lambda probe to get a
    correct run.
    Wow, you're heading for another big job - anyway you've already done that
    G.T, Apr 27, 2004
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  3. Chris B

    Chris B Guest

    Hi G.T.,

    Yes, that 405 cylinder head I put on the car a couple of years ago is
    deteriorating and I could probably do with a full engine rebuild. To be
    honest, I'm surprised it lasted this long as it had somewhere in the region
    of 120,000 miles on it and it came off a car in a breaker's yard that
    couldn't be started. I figured I'd put it on and see if I could get it to
    work and then if things went well, refurbish it later. It ran so perfectly
    straight away, that I didn't ever bother to take the head back off!
    Now it seems to be burning oil (probably still within the huge tolerances
    set by Peugeot though!), and it's making a clicking noise from somewhere on
    the head - it starts off very loud under acceleration and gets quieter as
    the car warms up.

    So, basically I can either get the engine rebuilt or get a new engine. I
    must admit, I rather like the idea of getting the 16v engine under the
    bonnet :)

    I've seen a Citroen XM turbo engine up for sale recently, but I think it
    might be too heavy & have far too many components to get into my engine bay!

    Chris B, Apr 27, 2004
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