Camshaft setting elements for an 8-valve engine
1 - ignition wire; 2 - ignition distributor; 3 - cylinder head cover; 4 - toothed belt; 5 - camshaft gear; 6 - stuffing box; 7, 8 - rocker block; 9 - back cover; 10 - gasket; 11 - thrust flange; 1 - bushing; 13 - camshaft.
Removing
Remove the air filter.
Disconnect the ignition wire 1 from the distributor cap and remove the ignition distributor (2) (if there).
Remove the fuel pump.
Unscrew the cylinder head cover (3).
Remove toothed belt (4).
Turn away a bolt of fastening of a cogwheel of a camshaft, holding a cogwheel and a camshaft from scrolling. To block the latter, insert a screwdriver from the side under the rocker block shaft so that the shaft spike rests against the screwdriver when the bolt is unscrewed, or block the camshaft gear with the rod from the front. To do this, insert a screwdriver into the hole in the gear wheel and rest against the top of the cylinder head. Remove the gear.
Take out the stuffing box (6).
Unscrew and remove the rocker arm (7 and 8). But first, loosen the valve clearance screws. Loosen all rocker axle mounting bolts 1/2 turn and then unscrew.
Some engines require some additional work.
Unscrew the back cover (9) and remove it with the gasket (1).
According to the figure, unscrew the bolt through the hole in the cylinder head, the thrust flange (11) and the camshaft thrust bearing housing.
Pull out the camshaft through the hole in the cylinder head on the transmission side.
Installation
ATTENTION: Camshafts have distinguishing marks! Do not mix up the shafts when installing.
Rinse all parts in gasoline and clean mating surfaces.
Check the end play of the camshaft: insert a feeler gauge between the thrust bearing housing and the camshaft. Permissible value: 0.0510.20 mm, limit value 0.4 mm.
Lubricate the camshaft and insert it into the cylinder head.
Early car models
- Insert the camshaft with the thrust bearing housing into the cylinder head. The threaded hole in the camshaft thrust bearing housing must be at the top. Align the threaded hole with the bolt hole on the cylinder head. Insert the bolt into the hole and tighten it.
- Screw on the back cover with a new gasket.
Late car models
- Install the camshaft with the dowel pin facing up.
After lubricating the rocker arm block with engine oil, install it on the engine.
Tighten the bolts finger tight, then tighten to 24 Nm (8 valve engine). For a 12-valve engine, the force is 32 Nm.
Install the oil seal (1) camshaft (2) using special devices (3) or a suitable piece of pipe.
Install and secure the camshaft sprocket and install the toothed belt.
Carbureted engine
Install the fuel pump with 2 new gaskets.
Adjust valve clearances.
Install the cylinder head cover.
Install the ignition distributor and put the ignition wires on the distributor cap.
Attach the air filter.