SEAT Workshop Service and Repair Manuals

Removing, installing and tensioning toothed belt Removing → Anchor Installing → Anchor Tightening torques → Anchor

Special tools and workshop equipment required

t	Torque wrench -SAT 8010-

t	Counterhold tool -T10050-

t	Counterhold tool -T10115-

t	Counterhold tool -T20018B-

t	Counterhold tool -T20102-

t	Support equipment -T20174-

t  Retainer -U-30025E- Removing   Note Adjustment work on the timing belt should only be done when the engine is cold, given that the position of the indicator arm on the tension device will vary depending on the engine temperature.

–  Remove the sound proofing from the engine by pulling forcefully upwards -arrows- .

–  Remove the supercharger air tube -1- Remove the supercharger air tube along with the connection tube by separating the spring clips or securing types -arrows- . –  Remove the breather hose for the crankshaft sump -2- from the air conduction pipe. –  Leave the hoses for low pressure loose. –  Remove hose -6- to the air filter.

–  Remove the Poly V-belt → Chapter. –  Remove Poly V-belt tension device → Item.

–  Disconnect the fuel supply hose -2- and return hose-1- (pressing the release tabs). –  Unbolt the coolant expansion tank (without removing hoses).

Engines with codes BNM, BNV and BMS –  Remove the thermostat from the hook on the coolant expansion tank -arrow- . Continued for all vehicles –  Move the fuel lines and the expansion tank to one side.

–  Position the support -U-30025E- and suspend the motor in the installation position.

–  Release the securing bolts -arrows- of the engine assembly. –  Remove upper notched belt guard.

–  Extract the bolts securing the engine support to the cylinder block -arrows-.

–  Remove the central soundproofing → Bodywork, exterior installation work; Rep. gr.50. –  Remove front right hand side wheel housing liner → Bodywork, exterior fitting work; Rep. gr.63. –  Remove the supercharger air pipe between the intercooler and the turbocharger → Chapter. –  Remove vibration damper / belt pulley. –  Remove notched belt guard centre and lower parts. –  Crankshaft at TDC cyl. 1 TDC.   Note

For this, rotate the crankshaft so the mark on the crankshaft pulley is upwards and the arrow on the timing belt is aligned at the back with the protrusions on the generator wheel of the hub -arrows- . –  Immobilise the hub using the retention tool -T20102-. –  Immobilise the crankshaft notched belt wheel using the crankshaft stop -T10050-.   Note

t  The crankshaft stop -T10050- can only be fitted over the crankshaft notched belt wheel from the front side of the notched belt. t  The marks on the notched belt wheel -2- and on the crankshaft stop -T10050--1-should face each other. For this, the crankshaft stop -T10050- journal should match the opening in the sealing flange. –  Mark the notched belt direction of rotation with chalk or felt pen.

–  Loosen the attachment bolts -1- from the camshaft wheel with the counterhold -T20018B- until the camshaft sprocket can turn loosely in the extended holes.

–  Unfasten nut of tensioning roller. –  Turn the off-centre adjustment with an allen key -anti-clockwise- until the tension roller can be secured with the locking pin -T10115- .

–  Next turn the Allen key -in the direction of the arrow- as far as possible and hand tighten the fastening nut -1-. –  First remove the timing belt from the coolant pump and then remove it from the other cogwheels.

Installing   Note t  Adjustment work on the timing belt should only be done when the engine is cold, given that the position of the indicator arm on the tension device will vary depending on the engine temperature. t  Ensure that the tension roller is correctly placed on the rear protection for the timing belt -arrow- . t  The tension roller should be fixed in the same position as for removal.

–  Rotate the camshaft wheel in its extended holes in the direction of the -arrow- to the limit. –  Fit the timing belt on the crankshaft, the tension roller, the camshaft wheels, the idle wheel and, lastly, onto the timing belt wheel of the coolant pump.

–  Unfasten nut of tensioning roller. –  Turn the off-centre adjustment with an allen key -anti-clockwise- until the locking pin -T10115- can be removed.

–  Rotate the tension roller -clockwise-, until the indicator arm is in a centre position of the plate groove -arrow- .   Note

When the attachment nuts are tightened, the pointer turns -arrow- from the opening of the baseplate to maximum 5 mm to the right. This position should not be corrected, given that the belt sits into place with time.   Note t  Ensure that the attachment nut does not also rotate. t  Use the correct tightening torque to avoid damages to the engine when tightening the tensioner. –  Hold the tension roller in this position and tighten the tension roller nut to 20 Nm + 45° (1/8 turn).   Note Use the correct tightening torque to avoid damages to the engine when tightening the tensioner. –  Extract the counterhold -T20102-.

–  Tighten the camshaft sprocket securing bolts -1- to 25 Nm, blocking any rotation using the counterhold -T20018B-. –  Extract the counterhold -T10050-. –  Continue to rotate the crankshaft by two revolutions in the direction of rotation of the engine until the crankshaft is stationary once more 1. –  Insert the crankshaft retention tool -T10050- into the sprocket, sliding it in until it enters the sealing flange.   Note t  The crankshaft stop -T10050- can only be fitted over the crankshaft notched belt wheel from the front side of the notched belt. t  The crankshaft stop -T10050- must enter into the hole in the sealing flange for the rotation. t  The position for inserting the crankshaft locking tool -T10050- cannot be adjusted by turning the crankshaft back. t  If the crankshaft has been rotated beyond TDC for cylinder 1 and the crankshaft stop -T10050- could not be pushed into the sealing flange at all, turn the crankshaft back a 1/4 turn so that the crankshaft can be placed back onto the TDC for cylinder in the engines direction of rotation again. –  After inserting the counterhold -T10050-, check that the camshaft cogwheel can be immobilised with the retention tool -T20102-. If the hub cannot be locked: –  Remove the stub of the crankshaft stop -T10050- from the hole in the sealing flange and turn the crankshaft until the hub can be locked with the pin.

–  Loosen the bolts -1- that hold the camshaft wheel.

–  Turn crankshaft in the opposite direction of engine rotation until the crankshaft stop -T10050- stub is just opposite the sealing flange hole -arrow- and insert it. –  Tighten the bolts attaching the wheel to the camshaft to 25 Nm. –  Remove the retention tool -T20102- and the crankshaft positioning device -T10050-. –  Rotate the crankshaft twice in the normal direction of rotation so that the cylinder 1 is again at the TDC position. –  Repeat the previous verification.

–  Fit the engine bracket on the cylinder block and tighten the bolts -arrows- to 45 Nm.   Note All of the indicated bolts must be tightened for the engine bracket before fitting the engine and gearbox support assembly. –  Fit the engine assembly support and tighten to the tightening torque: 20 Nm + 90° (1/4 turn).

–  Tighten the engine support assembly, joining the contact surfaces using the engine support -U-30025E-, tightening torque: 30 Nm + 90° (1/4 turn) . –  Install the centre toothed belt cover. –  Fit the lower timing belt protection and the vibration damper/crankshaft pulley. –  Install poly V-belt → Chapter. –  Install Poly V-belt tension device → Item –  Install toothed belt cover (top section). –  Remove the support -U-30025E-. –  Fit the intercooler/turbocharger and the intercooler/suction mouth coupling tubes → Chapter. –  Fill up coolant → Chapter. Installation is carried out in reverse order. Tightening torques

Component		Nm
Notched belt tensioning roller to cylinder head		20 + 45° → Remark
Camshaft pinion to bin		25
Bottom section of notched belt guard to cylinder block		10 → Remark
Centre section of notched belt guard to cylinder block		10 → Remark
Vibration damper to the crankshaft wheel		10 + 90° → Remark → Remark
Engine support to cylinder block		45
Engine mount to engine console		30 + 90° → Remark → Remark

1)  45° is the equivalent of (1/8 turn) 2)  Fit with thread locking fluid → Parts catalogue 3)  Renew bolts 4)  90° is the equivalent of (1/4 turn)