SEAT Workshop Service and Repair Manuals

Removing and installing cylinder head cover and camshaft Special tools and workshop equipment required

t  Counter-hold -T20018-

t  Torque wrench -SAT 8010- t  Sealant -AMV 154 103- Removing   Note! t  The sealing surfaces on cylinder head cover and cylinder head must not be reworked. t  In this cylinder head the camshaft bearings are integrated into the cylinder head and cylinder head cover. Before removing cylinder head cover, the toothed belt tension must be relieved. t  If the cylinder head cover has been loosened, replace camshaft oil seal. Work sequence –  First check whether a coded radio is fitted. If this is the case obtain the antitheft coding. –  With the ignition switched off disconnect the battery earth strap. –  Remove ribbed belt → Chapter. –  Loosen toothed belt tensioning roller and remove toothed belt from camshaft sprocket. Description of work → Chapter, Removing, installing and tensioning toothed belt. –  Remove camshaft sprocket. When loosening camshaft sprocket bolt counter-hold with -3036-. –  Remove rear toothed belt guard. –  Unscrew ignition transformer screws out of cylinder head cover.

–  Pull 3-pin connector off Hall sender -arrow-. –  Open cylinder head cover sealing cap and unclip screening cover and remove.

–  Remove cylinder head cover bolts in the sequence prescribed and loosen items 8 and 9 using diagonally and alternating sequence. –  Carefully remove cylinder head cover. –  Lift camshaft carefully, remove and place on a clean surface. –  Remove roller rocker finger together with support elements and place on a clean surface. –  Ensure the roller rocker fingers and the support elements are not interchanged. Installing Prerequisites l  Prevent dirt and sealant remnants from entering cylinder head. l  Sealing surfaces must be free of oil and grease. l  When installing cylinder head cover or camshaft, the cams for Cyl. 1 must face upwards. l  The pistons must not be positioned at TDC. –  Remove sealant remnants on cylinder head and camshaft housing with a commercially available sealant remover. –  Oil the camshaft contact surfaces. –  Insert support element in cylinder head and fit roller rocker finger onto respective valve stem end and support element.

–  Ensure all roller rocker fingers contact the valve ends -1- correctly and they are clipped into their respective support elements -2-. –  Carefully place camshaft in camshaft bearing of cylinder head.

–  Apply a thin even coat of sealant onto the clean cylinder head cover sealing surface.   Note! The sealant must not be applied too thick, otherwise excess sealant can enter the oil channels or camshaft bearing and cause damage to the engine.

–  Install the cylinder head cover carefully from above ensuring that the dowel pins fit in holes -arrows- in the cylinder head.   Note! t  Positioning and securing the cylinder head cover must be completed without interruption, as the sealing surfaces start to cure immediately they have contact. t  The cylinder head cover bolts must be replaced.

–  First tighten bolts items 1 and 2 alternately using diagonal sequence and tighten to 6 Nm. –  Then tighten the other bolts to 6 Nm in sequence prescribed. –  Then tighten all bolts a 1/4 turn (90 °) further.   Note! Sealant must be left dry for approx. 30 minutes after installing cylinder head cover. –  Install new oil seal in camshaft, → Chapter. The rest of the assembly is basically a reverse of the dismantling sequence. Installing toothed belt and adjusting timing → Chapter. –  Perform the work sequence “Procedure after voltage supply open circuit”. → Chapter –  Match engine electronics control unit to throttle valve control part: → Chapter