Cylinder Head Bolt Modifications (XU Series Engines from December 1986) (Peugeot 305)

82. Since December 1986, the cylinder head is secured with bolts with a hole in the head for a hexagon (55) (torx bolts).

83. In addition, thicker washers (8.0 mm) are used and the height of the cylinder liners is reduced by 0.05 mm, which gives a protrusion of the liners above the block of 0.03-0.10 mm.

83. The tightening procedure for bolts of this type is given in Specifications. Before installing the bolts, lubricate their threads and under the heads with molybdenum grease. The tightening sequence is shown in B/Figure 12.4.

85. Torx type bolts do not require retightening.