306 cam belt change
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  1. #1
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    Default 306 cam belt change

    I'm in the process of replacing the cam belt in my '95 306 s16. Although I've seen the inside of many diverse engines in the past, including four cam Maserati, this is my first PSA XU series.
    In the seeming absence of much published technical info, I've been relying on the Haynes manual.
    This states:
    16-valve models
    "Rotate the crankshaft pulley until the timing holes in both
    camshafts are aligned with their
    corresponding holes in the cylinder head. The
    holes are aligned when the inlet camshaft
    sprocket hole is in approximately the
    5 o'clock position and the exhaust camshaft
    sprocket hole is in approxmately
    7 o'clock position when viewed from the
    right-hand end of the engine.
    With the camshaft sprocket holes
    correctly positioned insert a 6 mm diameter
    bolt or drill through the timing hole in the
    crankshaft pulley, and locate it in the
    corresponding hole in the end of the engine.
    If the bolt or drill is not a snug
    fit try a larger size until a good fit is achieved
    in both the pulley and cylinder block.
    With the crankshaft locked in position,
    insert a suitable bolt or drill through the timing
    hole in each camshaft sprocket and locate it
    in the cylinder head."
    Well, I've done all that but the exhaust sprocket hole is in roughly the 5 o'clock position, the inlet sprocket hole is about 7/8 o'clock. I cannot see any holes in the cylinder head which would allow the sprockets to be reversed. Is this a typical Haynes screw-up?
    roger

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  2. #2
    1000+ Posts PeterT's Avatar
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    Default

    You need two stepped pins, that lock each pulley to the head. The two locating holes in the head are 6.5mm, the pulley diameter holes are 8mm, as you can probably see. The pins should be approx. 50mm long.

    When the pins are inserted, the crank should also be able to be locked with an 8mm dowel (or drill). This hole is even harder to find, but is roughly at 11 o'clock through the harmonic balancer.

    Haynes is wrong. Exh hole is at 5, Inlet at 7/8 as you said. The pulleys are identical.

    I'll take a picture tomorrow.

    '92 205 Mi16
    '90 Mi16x4

  3. #3
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    Default

    Quote Originally Posted by PeterT View Post
    You need two stepped pins, that lock each pulley to the head. The two locating holes in the head are 6.5mm, the pulley diameter holes are 8mm, as you can probably see. The pins should be approx. 50mm long.

    When the pins are inserted, the crank should also be able to be locked with an 8mm dowel (or drill). This hole is even harder to find, but is roughly at 11 o'clock through the harmonic balancer.

    Haynes is wrong. Exh hole is at 5, Inlet at 7/8 as you said. The pulleys are identical.

    I'll take a picture tomorrow.
    Thanks Peter,
    good to see Haynes are maintaining their usual standard.
    roger

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