1.3L 8v - TU24
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1.3L 8v - TU24
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Set of 4 reinforced exhaust valves for the Peugeot 205 Rallye / Citroën AX Sport TU24.
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.
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.
| Part number | Brand | Size | Head Ø | Stem Ø | Length | Grooves | Material |
|---|---|---|---|---|---|---|---|
| 9249011M*4 | CATCAMS | 31.3 mm | 8 mm | 111.0 mm |
The 9249011M is the only exhaust valve in the CATCAMS range for the TU24.
| Part | Peugeot / Citroën original | Reinforced |
|---|---|---|
| Collets | MK8 | |
| 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.
| CATCAMS, 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. |
This engine has only one version:
| Criterion | Option 1 | Option 2 |
|---|---|---|
| Part number | 9249011M*4 31.3 mm head, 8 mm stem, 111.0 mm length. |
| Model | Engine code | Power | Years |
|---|---|---|---|
| Peugeot 205 II (20A/C) 1.3 Rallye | TU24 | 101 hp | 1987-1990 |
| Citroën AX (ZA-_) 1.3 Sport (ZAM4A) | TU24 | 95 hp | 1987-1988 |
OEM part number (exhaust valve):
When the TU24 cylinder head comes off, replace the inlet valves and the valve stem seals as well.
| Inlet valves Peugeot 205 Rallye TU24 → |
