SEAT Workshop Service and Repair Manuals

Camshaft housing: Removing and installing

t  Hose clamps -3094-, see equivalent → Anchor t  Sealant →  Parts catalogue Camshaft housing: Removing → Anchor Camshaft housing: Fitting → Anchor Removing –  Remove camshaft timing chain → Chapter.   WARNING Injury risk! Fuel is subjected to very high pressure! The fuel pressure in the high-pressure section of the injection system must be reduced to a residual pressure prior to opening the system. –  High pressure system pressure reduction → Chapter.

–  Remove union nuts -arrows- and bolt -1- and detach high-pressure pipe.   Note Ignore -item 2-.

–  Remove bolts -arrows- and detach heat shield for turbocharger.

–  Remove bolt -4- and detach crankcase breather hose from turbocharger -arrow-.   Note Disregard -items 1, 2, 3-.

–  Clamp off coolant hoses with hose clamps -3094- as shown in illustration. –  Remove bolts -1, 3, 4, 5-.   Note Ignore -item 2-. –  Disconnect coolant lines from turbocharger and move clear to one side.

–  Remove bolts -2- and -3- and take off retaining plate.   Note -Items 1 and 4- can be disregarded.

–  Slacken camshaft housing bolts in the sequence -15 ... 1-.   Note Bolt -14- below turbocharger remains in camshaft housing. –  Carefully release and remove the camshaft housing from bonded joint. –  Mark original positions of roller rocker fingers and compensation elements for reinstallation. –  Remove roller rocker fingers together with compensation elements and put down on a clean surface. Installing l  Camshaft housing: Tightening torques → Fig., Exhaust gas turbocharger: Tightening torques → Chapter l  No piston at „TDC“.   Note Renew oil strainer and seals in cylinder head.   Caution Protect lubrication system and bearings against contamination. Cover exposed parts of the engine. –  Remove the sealant residues from the camshaft casing and the cylinder head using a rotating brush, e.g. a hand drill machine with plastic brush (wear protective goggles). –  Clean sealing surfaces carefully. They must be free of oil and grease. –  Prevent dirt and sealant remains from entering the cylinder block.

–  Turn the intake and exhaust camshafts until the adjustment tool -T10171A- is able to fully enter the openings in the camshafts.

–  Hand thread (without tightening ) an M6 bolt to secure the adjustment tool -T10171A-.

–  Ensure all roller rocker fingers contact the valve ends -1- correctly and are clipped into their respective support elements -2-.

–  Apply a thin and even layer of sealant to the clean sealing surface of the camshaft housing at grey-shaded areas -1 ... 5- shown in illustration.

–  Fit new oil strainer -1- into the cylinder head. –  Fit 4 new seals -2- into the cylinder head.   Caution Make sure remnants of oil are removed before fitting, otherwise leakage can occur. Make sure sealing surfaces are free of oil when fitting camshaft housing.

–  Carefully fit the camshaft housing vertically onto the dowel pins -arrows- on cylinder head from above.   Note Make sure that camshaft housing is kept straight.

–  Tighten camshaft housing bolts.   Note After fitting camshaft housing, allow sealant to dry for approx. 30 minutes. –  Renew camshaft housing bolts. –  Tighten bolts in the sequence -1 ... 15- in 2 stages as follows: 1.  Tighten to 10 Nm 2.  Turn 90° further. –  Connect the fuel lines → Chapter. –  Adjust distribution timing → Chapter. –  Fit distribution casing → Chapter.