Fitting a timing belt to a XU10JR4S
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  1. #1
    Fellow Frogger! 1pugnut's Avatar
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    Default Fitting a timing belt to a XU10JR4S

    Hi I am fitting a new timing belt on a XU10JR4S motor with the spring loaded tensioner
    The motor is out of a xsara vts about 2003
    I can't find a manual any where.
    Any help would greatly appreciated
    Regards Jamie

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    Fellow Frogger! Bluey's Avatar
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    Loosen the crank pulley bolt first.
    Pin the cam gears and the crank.
    loosen the cam gear bolts.
    loosen tensioner & remove.
    Remove belt.
    Change whatever you want to: idler, water pump, crank seal etc.
    Fit tensioner.
    Check that the cam gears flop back and forth when their bolts are slackened off. If not, sort it. Turn the cam gears all the way clockwise.
    Slide about 5mm of belt onto the tensioner, water pump and one of the cam gears while you get the remainder of the belt onto the other cam gear and wiggle the whole lot on.
    Fit allen key and turn the tensioner until the indicator is about 1/3 of the way between the front edge and the slot of the mounting plate.

    Tighten tensioner bolt.
    Tighten cam gear bolts.
    Remove pins & rotate engine. Pins should go back in with ease if done accurately. You will also notice that the indicator has moved clockwise while you turned the engine.
    Tighten crank pulley bolt.

    When starting the engine, take the cam belt cover off and check that the belt runs true and is not whining. If whining, do the whole process again but don't turn the tensioner as much.

  3. #3
    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by Bluey View Post
    Loosen the crank pulley bolt first.
    Pin the cam gears and the crank.
    loosen the cam gear bolts.
    loosen tensioner & remove.
    Remove belt.
    Change whatever you want to: idler, water pump, crank seal etc.
    Fit tensioner.
    Check that the cam gears flop back and forth when their bolts are slackened off. If not, sort it. Turn the cam gears all the way clockwise.

    [...]
    Bluey, just for curiosity, I am not sure I understand what you mean here by "turn the cam gears all the way clockwise". Do you mean "spin the cam gears but without moving the camshafts"? Because turning the camshafts would be impossible with the crank pinned (not without damage to the valves, anyway).

    Sounds like a risky step, either way. Even only spinning the cam gears means the camshafts themselves are not pinned anymore, or is there a way to pin them on this engine (I have never worked on this engine, so don't know anything about it).
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Citroen Xsara mechanics' handbooks are online. CARNETS DE POCHE
    French ones tend to be more detailed than English.

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    Fellow Frogger! Bluey's Avatar
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    Quote Originally Posted by schlitzaugen View Post
    Bluey, just for curiosity, I am not sure I understand what you mean here by "turn the cam gears all the way clockwise". Do you mean "spin the cam gears but without moving the camshafts"? Because turning the camshafts would be impossible with the crank pinned (not without damage to the valves, anyway).

    Sounds like a risky step, either way. Even only spinning the cam gears means the camshafts themselves are not pinned anymore, or is there a way to pin them on this engine (I have never worked on this engine, so don't know anything about it).
    The cam gears are a two piece design.


    The inner, (fully enclosed question mark looking piece), has a key that drives the cam and the hole for the pin. It is sandwiched between the cam gear and the shaft. It keeps the cam locked in position with the bolt slackened off allowing rotation of the outer. You turn the outer fully clockwise before fitting the belt because when the tensioner is set, the belt will naturally rotate the gears backwards.
    The camshafts stay stationary the entire time. The cam gears rotate backwards as tension is set.

  6. #6
    1000+ Posts schlitzaugen's Avatar
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    Ha. Tricky! Didn't know that. Why would they complicate the design so much though?
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Fellow Frogger! 1pugnut's Avatar
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    Thanks for the replies,
    I will give it a go tomorrow and see how I go.

    series 2 405 mi16
    205 si
    series 1 205 gti
    series 3 205 with a gti6 motor project
    1970 404 ute 504 ti motor project
    parts cars 2 205 si's 306 sedan
    2004 206 gti180

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