SEAT Workshop Service and Repair Manuals

Removing and installing camshafts - 1.8 litre engine t  Removing → Anchor t  Installing → Anchor

Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Assembly tool -T10352- and assembly tool -T10352/1-, see equivalent → Anchor

t	Hose clamp -T10355-, see equivalent → Anchor

t	Spanner -T20079A-, see equivalent → Anchor

t	counterhold -T20208-, see equivalent → Anchor

t	Hose clamp -T40011-, see equivalent → Anchor

t	Extractor -T40039-, see equivalent → Anchor

t  Engine sealing plug set -VAS 6122-, see equivalent → Anchor

t  Tappet -T10174-, see equivalent → Anchor t  Torque wrench -VAG 1331-, see equivalent → Anchor. t  Torque wrench -VAG 1332-, see equivalent → Anchor. Removing   Note t  Sealing surfaces at bottom of cylinder head cover and top of cylinder head must not be machined. t  The camshaft bearings are integrated into the cylinder head and cylinder head cover. The timing chain must be slackened before removing the cylinder head cover. t  Renew sealing cap if cylinder head cover has been detached. t  The cable ties must be installed in their same place again. –  Move lock carrier to service position → Rep. gr.50.

–  Pull off engine cover panel -arrows-.

–  Unscrew both bolts-arrows- for the air pipes -1- on the lock carrier plate.

–  Loosen the bracket -1-, disconnect the air hose and place to the side. –  Disconnect the connector -2- from the air mass meter -G70-. –  Unclip cable harness from air cleaner housing and lay down to side. –  Loosen expansion clip -3- and separate air cleaner housing. –  Pull upward to loosen lower mounts and to remove air cleaner housing.

–  Detach the connector for valve 1 of the variable valve timing -N205--1- –  Unscrew bolts -arrows- and remove camshaft control valve 1 -N205-.

–  Unscrew bolts -1 to 5- and remove timing chain cover (top).   Caution The control valve has a left hand side thread.

–  Remove the control valve using the assembly tool -T10352- or assembly tool -T10352/1- in the -direction of the arrow- depending on the version.

–  Unscrew the bolts -arrows- and remove the subframe.

–  Turn the vibration damper to „TDC“ position -arrow- using counterhold tool -T10355-. l  Notch on vibration damper must align with arrow marking on cover for timing chains (bottom).

–  On the camshaft timing chain and the cylinder head -arrows- draw on the markings that are found on the chain sprockets -1- using a waterproof felt pen.

–  Remove sealing plug -arrow-.   Note t  The box -1- is shown in a removed condition in the following figures to provide a better view.

t  Lift the locking element -2- with a scriber or suitable screwdriver -3- in -the direction of the arrow-.

–  Insert scriber or suitable screwdriver in hole of chain tensioner in direction of -arrow 1- and lift locking element for chain tensioner. –  Turn crankshaft in opposite direction to normal rotation -arrow 2- and lock in place using locking pin -T40011-.   Note Inlet camshaft will move in direction of engine rotation.

–  Remove bolt -1- and detach tensioning rail -2- downwards. –  Use screwdriver to release catch and press off top guide rail -3- forwards. –  Remove camshaft timing chain from camshaft sprockets.   Caution Risk of damage to valves and piston heads. Once the camshaft chain has been extracted from the cylinder head, the crankshaft must not turn. –  Remove bolts from connector rail for ignition coils.

–  Release connectors -arrows- and unplug all connectors from the ignition coils at the same time.

–  Remove ignition coils using puller -T40039-.

–  Remove crankcase breather hose -1-. –  Remove bolts -arrows-, detach crankcase breather system and disconnect from crankcase breather hose -2- in direction of -arrow-.

–  Disconnect pipe -arrows-. –  Unplug electrical connector -1- from Hall sender -G40- –  Remove the high-pressure pump, 1.8 litre engine (CDHA, CDHB) → Chapter. , 2.0 litre engine (CDND) → Chapter. –  Remove exhauster pump → Rep. gr.47.

–  Tighten cylinder head cover bolts in the sequence -1 … 6-. –  Remove the cylinder head cover –  Detach camshafts.   Caution Protect lubrication system and bearings against contamination. Cover exposed parts of the engine. Installing l  Tightening torques → Chapter   Note t  The sealing surfaces must be free of oil and grease. t  Pistons must not be at TDC. t  Ensure that all the roller rocker fingers are correctly supported on the ends of the valve stems. –  Remove sealant remaining on cylinder head with flat scraper.   WARNING Protect eyes against injuries. Wear safety goggles.   Caution Protect lubrication system and bearings against contamination. Cover exposed parts of the engine.

–  Remove sealant residue in groove of cylinder head cover and on sealing surfaces, e.g. using a rotating plastic brush. –  Clean sealing surfaces; they must be free of oil and grease.

–  Cut off the tube nozzle on the front marking (diameter of the nozzle approximately. 2 mm). –  Oil running surfaces of both camshafts.

–  Fit camshafts in cylinder head, recesses -arrows- must face each other. –  Replace the cylinder head cover bolts.

–  Apply silicone sealant onto clean sealing surface of cylinder head cover, as illustrated -arrows-. t  Thickness of the sealant grub: 2 to 3 mm.   Note t  The cylinder head cover must be installed within 5 minutes after applying the silicone sealant. t  The bead of sealant must not be thicker than specified, otherwise excess sealant can enter the sump and obstruct the strainer in the oil intake pipe. t  Observe use-by date of sealant. Sealant → Electronic spare parts catalogue. –  Tighten bolts in several stages; tightening sequence → Fig..   Note t  Ensure that the cylinder head cover is not tilted!

t  Use thrust piece -T10174- to drive in sealing cap -1- (do not apply sealant). t  -a-: 1 ... 2 mm

–  Turn the vibration damper to „TDC“ position -arrow- using counterhold tool -T10355-. l  Notch on vibration damper must align with arrow marking on cover for timing chains (bottom).   Note The timing chain links with markings must be positioned at the markings on the chain sprockets.

–  Place the counterhold -T20208- and fasten it to the cylinder head with the lower bolt. –  Turn the camshafts towards the counterhold -T20208- to adjust their axial position and block them, bearing in mind the marks.   Note

t  Where required, insert the spanner to turn inlet camshaft in direction of -arrow- and fit camshaft timing chain. The markings -arrows- on the camshaft timing chain and the cylinder head must align with the retention tool -T20208-. t  This figure is used as an instruction, being a requirement that the support tool -T20208- is mounted and that the sprocket in the camshaft is not blocked. l  The marks of the camshafts should coincide with the marks on the counterhold -T20208-.   WARNING Once the camshafts are blocked and before tightening the cylinder head cover, loosen the lower bolt of the counterhold -T20208-. If not, the camshafts could be damaged.

–  Insert the spanner to turn inlet camshaft in direction of -arrow- and fit camshaft timing chain. The markings on the camshaft timing chain and the cylinder head -arrows- must align with the sprockets -1-.

–  Attach bearing saddle and screw in bolts -arrows- hand-tight. –  Remove locking pin -T40011-. –  Tighten bolts -arrows- for bearing saddle → Chapter. –  Install timing valve → Item. –  Install timing chain cover (top) → Chapter. –  Install the vacuum pump → Rep. gr.47. –  Install the high-pressure pump, 1.8 litre engine (CDHA, CDHB) → Chapter. , 2.0 litre engine (CDND) → Chapter. Further assembly is basically the reverse of the dismantling sequence. –  Install the lock carrier → Rep. gr.50.