SEAT Workshop Service and Repair Manuals

Distribution chain and oil pump control chain: removing and fitting Consult the equivalence table for tools and equipment according to applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Dial gauge -VAS 6079-

t	Extractor -T10094A-, ver nota → Anchor

t	Dial gauge adapter -T10170-

t	Camshaft fastener -T10171-

t	Retention tool -T10172-, see equivalent → Anchor

t	Pin -T40011-

t  Spark plug spanner -3122 B-, see equivalent → Anchor

t  Retention tool -3415-, see equivalent → Anchor t  Torque wrench (5 -50 Nm) -V.A.G 1331- Removing

–  Remove the camshaft housing covers by unscrewing the bolts -arrows-. –  Press the tabs -1- and remove the air intake hose from the air intake duct.

–  Remove the spring type clips -2- using the pliers for hose clips -VAS 6340- or the pliers for spring type clips -VAS 5024A- and disconnect the intake hose from the air filter casing. –  Undo the fastening bolts on the cover of the exhaust camshaft -3- and the intake camshaft -4- and remove the covers from the camshaft casing. –  Desmontar la bujía del cilindro 1. Utilizar para ello el extractor -T10094A- y la llave de bujías -3122 B-.

–  Tighten the dial gauge adapter -T10170- as far as possible on the thread of the spark plug. –  Fit the dial gauge -VAS 6079- with the extension -T10170/1- as far as possible and fasten using the retainer nut -arrow-. –  Turn the crankshaft in the direction of engine rotation to TDC cylinder 1. Check the position of the small needle on the dial gauge.

The openings -arrows- of the camshafts should be in the positions shown. Where necessary, turn the crankshaft one turn (360°).   Note t  If the crankshaft is turned beyond TDC by more than 0.01 mm, the crankshaft should be turned a further 45° in the opposite direction to that of the engine rotation. Next, turn the crankshaft in the direction of engine rotation to TDC cylinder 1 . t  Permitted deviation with respect to TDC cylinder 1: ±0.01 mm

–  Fit the camshaft fastener -T10171- as far as possible into the openings in the camshaft. The locking pins -arrow 1- should fit in the openings -arrow 2-. The word “TOP”-arrow 3- should be legible from above.

–  Hand thread (without tightening ) an M6 bolt -arrow- to secure the camshaft fastener -T10171-. –  Remove distribution casing → Chapter.

–  Remove the cover -1- of the oil pump sprocket.

–  Push the tensioning rail by hand in the -direction of the arrow- and lock the piston of the chain tensioner using the pin -T40011-.

–  Mark the direction of rotation of the distribution chain -3- using a felt tip pen.   Note The securing bolt of the variator -2- is left-threaded. –  Remove bolts -2- and -4- and take out the variator -1- together with the distribution chain -3-. To lock, use the retention tool -T10172-.

–  Lock the oil pump sprocket using the retention tool -T10172- and undo the fastening bolt -1-.

–  Using a screwdriver, lever the tensioning spring -1- at the bolt -2- and remove the tensioning spring -1-. –  Loosen fastening bolt -3- and remove the chain tensioner. –  Mark the direction of rotation of the oil pump control chain -2- using a felt tip pen.

–  Undo the fastening bolts of the sprocket -1- and remove the sprockets -1- and -3- together with the oil pump control chain -2-. Fitting l  The crankshaft should be in TDC cylinder 1

–  Move the sprocket -1- in the -direction of the arrow - as far as possible along the crankshaft journal.   Caution The cast-iron projection -2- on the sprocket -1- should fit into the groove -3- of the crankshaft journal.

–  Mark the positions of the sprocket and the crankshaft with respect to the cylinder head using a felt-tip pen.

–  Place the oil pump control chain -3- on the sprocket -1- and at the same time fit the sprocket -2- on the oil pump drive shaft.   Note t  Observe the mark showing the direction of rotation of the oil pump control chain. t  The oil pump drive wheel only fits in one position on the oil pump drive shaft -arrow-.

–  Lock the oil pump drive wheel using the retention tool -T10172-. –  Tighten the bolt -1- to 20 Nm + 1/4 turn (90°).

–  Place the chain tensioner on the oil pump control chain and tighten the securing bolt -3- to 15 Nm. –  Lever the tensioning spring -1- using a screwdriver at bolt -2-.   Note t  Observe the marks -arrows-. t  The crankshaft can not turn. –  Bolt the sprocket -3- by hand using a new fastening bolt.

–  Fit the distribution chain -1- on the crankshaft sprocket -4-, the exhaust camshaft sprocket -3- and hand tighten the variator -2- with a new fastening screw.   Note t  Observe the mark showing the direction of rotation of the distribution chain -1-. t  Check that the guide hose is fitted between the intake camshaft and the variator. t  The securing bolt of the variator -2- is left-threaded.

The distribution chain should rest on the guide rail -1- and on the crankshaft sprocket -arrow-.

–  Fit the chain tensioner -1- and tighten the securing bolts -2- to a torque of 9 Nm. –  Tension the distribution chain by removing the pin -T40011- from the tensioner device. –  Check that the marks on the crankshaft sprocket and the engine block match.

–  Tighten the fastening bolt -2- to a torque of 40 Nm and bolt -4- to a torque of 50 Nm (use retention tool -T10172-).   Note t  The fastening bolts -2- and -4- are tightened with a retightening angle of 90°, after checking the distribution timing t  The securing bolt of the variator -2- is left-threaded.

–  Undo bolt -arrow- and remove the camshaft fastener -T10171- from the camshaft casing. –  Check distribution timing → Chapter If timing is OK:

–  Lock the camshaft sprockets using the retainer tool -T10172- and tighten the bolts -2- (left-threaded) and -4- 1/4 turn (90°) using a spanner.   Note The securing bolt of the variator -2- is left-threaded.   Note The camshaft sprockets must not turn when tightening them onto the camshaft.

–  Fit the cover of the oil pump wheel -1-. –  Remove distribution casing → Chapter. Continue installation following reverse order for removing.