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Check the semi-automatic tension roller of the notched belt > < Removal:

Leon Mk2

Fitting
Fitting
Prerequisites
l  The pistons should not be in top dead centre.
l  The timing belt wheel for the crankshaft comes attached to the crankshaft with a bolt and two washers.
l  The camshaft wheel is immobilised with the camshaft fastener -T10016- in all the attachment holes on the camshaft housing to prevent it from turning.
  Note
On turning the camshafts, the valves may hit the pistons if they are at TDC.
   
–  Place the crankshaft in cylinder 1 top dead centre. The timing tooth should line up with the mark on the oil pump -arrow-.
–  Fit the notched belt of the derived branch clockwise, first above the intake camshaft sprocket and then above the exhaust camshaft sprocket. The slack section of the notched belt should hang below. If reusing a timing belt ensure to refit following the original direction of rotation.
Fit the notched belt tension roller of the derived branch, as follows:
  N13-0147
–  Turn the tension roller of the derived branch of the notched belt using the interior hexagon -1- clockwise towards the marker window -arrow- (the tension roller is slack).
–  Press upwards the lower part of the derived branch of the notched belt with the tension roller and screw in the securing bolt of the tension roller.
–  Tighten the securing bolt by hand. The projecting part of the base plate should fit in the cylinder head drilled space -2-.
  N13-0364
–  Then tighten the timing belt by rotating the tension roller with interior hexagon in pos. -1- anticlockwise, until the indicator -2- is on the projecting part of the base plate of the marker window -arrow-.
–  Fasten the clamp bolt of the tension roller. Tightening torque: 20 Nm
  Note
The camshafts should be locked using the tool to stop involuntary turning, until the principal timing belt is fitted.
–  Fit the principal timing belt anti-clockwise, on the water pump, the tension roller, the crankshaft, the idler roller and the intake camshaft sprocket. If reusing a timing belt ensure to refit following the original direction of rotation
If the tension roller was dismounted earlier, install as follows:
  N13-0365
–  Turn the principal timing belt tension roller anticlockwise with the interior hexagon to position -arrow-.
  N13-0366
–  Tighten the securing bolt by hand. The base plate -1-cut-out must engage over securing bolt -2-.
–  Then tension toothed belt by turning the tensioning roller in the direction of the arrow until the indicator -3- aligns with the groove in the baseplate -arrow-.
–  Fasten the clamp bolt of the tension roller. Tightening torque: 20 Nm
–  Remove the camshaft sprocket tool.
–  Rotate the crankshaft twice in the DOR of the engine until the Top Dead Centre of cylinder 1 is reached.
–  Next recheck the notched belt adjustment and the position of the tension rollers.
–  If necessary, repeat the tensioning of the notched belts.
–  Re-install the lower timing belt guard.
–  Install crankshaft pulley. Note the following:
t  Use a new attachment bolt for the pulley and the timing belt wheel.
t  When fitting the pulley check the fixing with respect to the notched belt wheel.
t  Tightening method for the new oiled bolt: 90 Nm + retighten 1/4 turn (90°).
–  Fit the bracket on the engine block. Tightening torque: 50 Nm
–  Fit the engine subframe: Tightening torque → Chapter
–  Install top notched belt guard.
–  Installing Poly-V belt → Chapter.
  Note
When fitting the Poly-V belt, make sure that it is correctly seated on the pulleys.
–  Install the centre soundproofing → Bodywork, exterior assembly work; Rep. Gr.50.
–  Fit front right hand side wheel housing protection: → Bodywork, exterior fitting work; Rep. Gr.50.
–  Fasten the coolant expansion tank.
–  Fit the activated carbon filter.
–  Fit the air filter housing → Chapter.
  N13-0180

Check the semi-automatic tension roller of the notched belt > < Removal: