Removal and installation the camshaft (Audi A2)

Table of contents: Removal ↓ Installation ↓

Removal

The cylinder head is installed. Remove the toothed belt, toothed belt drive with hydraulically damped tension roller, toothed belt drive with friction-damped tension roller. Remove the lock "3359". Unscrew the bolts "1" and remove the camshaft sprocket from the bushings.

Loosen bolt "1" of the bushing using the support key "T10051". Then unscrew the bolt by about 2 turns.

Install the puller "T10052" on the bushing and screw in the bolts. Remove the bushing from the camshaft, to do this hold the puller by the hexagon (SW 30) and screw in the bolt "2". Remove the bushing from the camshaft cone. Remove the cylinder head cover.

Loosen the outer and then the inner bolts on the rocker shaft and remove the rocker shaft. Remove the tandem pump. First remove the bearing caps "2" and "3". Then loosen the bearing caps "1" and "4" alternately crosswise. Bearing cap "4" is marked as bearing cap "5". Make sure that the camshaft bearing shells are not mixed up. Mark the correspondence of the camshaft bearing shells on the back with a waterproof marker. Remove the camshaft.

Installation

Installation in reverse order, taking into account the following: the crankshaft sprocket must be fixed with the crankshaft stopper "T10050". The markings on the sprocket and the crankshaft stopper "arrow" must be opposite each other. In this case, the crankshaft stopper journal must enter the hole in the sealing flange.

Instructions: Make sure that the camshaft bearing shells that have already been used are not mixed up (take into account the markings).

When installing the camshaft, check the correct position of the locking protrusions of the bearing shells in the bearing caps and cylinder head. Lubricate the working surfaces of the camshaft with oil. Set the camshaft in the "TDC" position of cylinder 1. The camshaft cams of cylinder 1 should be facing up "arrows". Tighten bearing caps "2" and "3" alternately crosswise.

Apply a thin layer of sealant evenly to the surfaces of bearing caps "1" and "4".

Bearing cover "4" is marked as bearing cover "5". Make sure that no sealant gets into the grooves "arrow" and on other surfaces. Install bearing covers "1" and "4" and tighten them also. Bearing cover "4" must be flush with the outer plane of the cylinder head, since otherwise the tandem pump may become leaky. Install the camshaft oil seal. Install the rocker arm axle and tighten first the inner bolts, then the outer bolts in several stages. Install the bushing on the camshaft. Tighten bolt "1" using the support key "T10051". Install the camshaft sprocket on the bushing. The toothed sector "arrow" of the camshaft sprocket must face up. Screw in bolts "1" not all the way. Secure the camshaft bushing with the locking tool "3359".

Install the timing belt (adjust valve timing): toothed belt drive with hydraulically damped tension roller, toothed belt drive with friction-damped tension roller. Install the tandem pump. If the rocker shaft or the ball-head bolts and mounting bolts are replaced, the position of the pump-injector module must be adjusted. Install the cylinder head cover.

Instructions. After installing the camshaft, the engine must not be started for approximately 30 minutes. The hydraulic tappets must be settled (otherwise the valves will touch the pistons). After working on the valve mechanism, turn the engine by hand at least 2 revolutions to ensure that none of the valves are in contact with the piston.

Tightening torques: