Renold Chain Tensioner (page 3 of 3)

• Fit the oil pump and distributor shaft. The piston of No. 1 cylinder must be at top dead centre. Insert the shaft so that the slot in the shaft end is parallel with the engine centre line. The slot is off-centre and the shaft must be fitted with the smaller segment facing towards the cylinder block. Push the shaft fully in position. The shaft will turn as it engages with the drive gear on the camshaft and the slot should be orientated from the bottom left to the top right, with the wider segment of the driver towards the rear of the engine. Fit the distributor support/clamp and tighten.
• Fit the oil pump. First check that the dowel pin is in position in the cylinder block. Fit a new “O” seal and fit the pump to the crankcase. Turn the shaft to engage the drive. Tighten the screws to 1.0 kgm (7.2 ft.lb.)
• Fit the oil sump with a new gasket. Tighten the screws to 1.0 kgm (7.2 ft.lb.).
• Generously lubricate the valve tappets with engine oil and insert them into their original bores, if the old ones are used. New tappets can be inserted in any bore.
• Remove the cylinder liner clamps. Once more check that the flats on the end flanges of liners No. 1 and No. 2 and No. 3 and No. 4 are parallel with each other.

The next operation is the installation of the cylinder head. The tightening method has been altered since introduction of these engines, i.e. you will have to know when the engine was manufactured. It is also imperative to obtain the correct cylinder head gasket.

• Insert two locating pins into two corners of the cylinder block (into the side opposite the distributor). Cut the ends of two old cylinder head bolts and cut a slot for the application of a screwdriver into the end. Any bolt/stud of suitable diameter and thread will do.
• Place the cylinder head gasket over the block. Gaskets are marked (for example DESSUS, top) and the writing must be visible after the gasket has been fitted.
• Place the cylinder head in position, tapping it down with a mallet.
• Insert the push rods into the tappets in accordance with the cylinder number and valve number. Lubricate the rod ends with engine oil.
• Fit the rocker shaft assembly. The cylinder head will now have the appearance shown in Fig. 1.42.
• Coat the cylinder head bolts with engine oil and screw them in position. Two versions can be encountered: Bolts with 12 mm diameter are fitted with washers, bolts with 11 mm diameter with a shoulder underneath the bolt head require no washers.

The cylinder head bolts are now tightened in the sequence shown in Fig. 1.43.