1.3L 8v - TU24

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1.3L 8v - TU24

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Reinforced exhaust valves Peugeot 205 Rallye Citroën AX Sport TU24

New product

Set of 4 reinforced exhaust valves for the Peugeot 205 Rallye / Citroën AX Sport TU24.

  • Brand: CATCAMS
  • Engine: TU24 1.3 8V (205 Rallye 1987-1990, AX Sport 1987-1988)
  • Dimensions: 31.3 mm head, 8 mm stem, 111.0 mm length

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195,84 € tax incl.

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  • Peugeot and Citroën engines covered

    The TU24 powers the Peugeot 205 Rallye 1.3, built from 1987 to 1990; in this car the 1.3 litre four-cylinder from the TU family produces 101 hp.

    The TU24 powers the Citroën AX Sport 1.3, built from 1987 to 1988; in this car the 1.3 litre four-cylinder from the TU family produces 95 hp.

    Its 8-valve cylinder head has one exhaust valve per cylinder, 4 in all, with an 8 mm stem. These are the valves that take the full blast of the burnt gases as they leave the combustion chamber.

    CATCAMS reinforced exhaust valves

    On the exhaust side, the head metal reaches 760 to 870 °C on a naturally aspirated engine. It cools first through the seat, which carries away nearly 75 % of the heat, the guide removing about 20 %. An EV8 family steel keeps only 300 MPa at 800 °C, against 550 MPa at 600 °C: an overheated head fatigues, distorts and ends up seating poorly.

    CATCAMS makes the 9249011M for the TU24, supplied here as a set of 4: 31.3 mm head, 8 mm stem, 111.0 mm length.

    Exhaust valve technical specifications

    Part numberBrandSizeHead ØStem ØLengthGroovesMaterial
    9249011M*4CATCAMS31.3 mm8 mm111.0 mm

    The 9249011M is the only exhaust valve in the CATCAMS range for the TU24.

    Valve fitting

    PartPeugeot / Citroën originalReinforced
    ColletsMK8
    Valve stem seals
    Valve guide

    MK8 collets hold the 9249011M: check how they sit in the groove before releasing the valve spring compressor.

    The 8 mm stem calls for guides of that diameter; measure the clearance in each guide before reassembly.

    Regrind the exhaust seats during the rebuild, so that the 31.3 mm head seats over its full width.

    Technical guide

    Our brand

    CATCAMSCATCAMS, a European specialist in competition valvetrains, makes the 9249011M for the exhaust side of the TU24; it is sold here as a set of 4.

    How to choose

    This engine has only one version:

    CriterionOption 1Option 2
    Part number9249011M*4
    31.3 mm head, 8 mm stem, 111.0 mm length.

    When reinforced valves become necessary

    • Camshafts with more lift or duration
    • Higher maximum rpm
    • Rally, hillclimb or track use
    • Cylinder head rebuild with worn exhaust valves

    Vehicle compatibility

    ModelEngine codePowerYears
    Peugeot 205 II (20A/C) 1.3 RallyeTU24101 hp1987-1990
    Citroën AX (ZA-_) 1.3 Sport (ZAM4A)TU2495 hp1987-1988

    OEM part number (exhaust valve):

    Important: one set of 4 covers the whole engine, which has a single exhaust valve per cylinder; the guides must take an 8 mm stem.

    Don't forget the inlet valves

    When the TU24 cylinder head comes off, replace the inlet valves and the valve stem seals as well.

    Inlet valves Peugeot 205 Rallye TU24 →