The valve spring compressor is used to free the camshaft from tension created by contact with the valves and enables correct tension to be applied to the timing belt. For use on Citroën: Berlingo | AX | AX GTi | ZX | Xsara and Peugeot: 106 | 205 | 306 | 307 | 405 | Partner.For use on Citroën: Berlingo | AX | AX GTi | ZX | Xsara and Peugeot: 106 | 205 | 306 | 307 | 405 | Partner with 1.0 | 1.1 | 1.4 | 1.6 engines.OEM ref. 4533 T2/0132AE.Enables correct tension to be applied to the timing belt.Used to free the camshaft from tension created by contact with the valves and enables correct tension to be applied to the timing belt.Time saver.