Car Mechanics (UK) - - Timing Belt Clinic -

Be­fore dis­man­tling any­thing, dis­con­nect the car’s bat­tery.

Store all nuts, bolts, clips, etc. in sep­a­rate, la­belled con­tain­ers so that you can tell at once where they have come from when the time comes for re­assem­bly.

Ro­tate the en­gine ONLY in the nor­mal di­rec­tion of ro­ta­tion when run­ning (ie, clock­wise when viewed from the right-hand side of the ve­hi­cle) and never in the op­po­site di­rec­tion. Note: If the spark plugs are re­moved, elim­i­nat­ing com­pres­sion, it is eas­ier to ro­tate the en­gine.

When re­leas­ing/tight­en­ing the crank­shaft pul­ley bolt, the en­gine can be pre­vented from ro­tat­ing by lock­ing the fly­wheel us­ing a large flat-blade screw­driver or long bar, but take care that it doesn’t slip.

Avoid turn­ing the crank­shaft and/or camshaft while the cam­belt is re­moved.

NEVER use the cam sprock­ets to ro­tate the en­gine. The cam­belt links the camshaft and crank­shaft sprock­ets with a ten­sioner assem­bly to­wards the top of the rear­most belt run, with the wa­ter pump po­si­tioned half­way down the belt run to­wards the front of the en­gine. Nor­mal di­rec­tion of ro­ta­tion of the en­gine and the cam­belt is clock­wise when viewed from the right-hand side of the car. Be­fore re­mov­ing the wa­ter pump, place a bowl un­der­neath the car to catch the coolant as it es­capes; dis­pose of it in an en­vi­ron­men­tally-friendly man­ner. On re­assem­bly, ap­ply torque set­tings as rec­om­mended by Re­nault. These vary ac­cord­ing to the ve­hi­cle model, so re­fer to the man­ual spe­cific to your par­tic­u­lar car. Note that, on completion of the job and hav­ing re­filled the cool­ing sys­tem with an­tifreeze, the sys­tem needs to be bled of air. There’s a Schrader valve-type bleed point at the air fil­ter end of the cylin­der­head, un­der­neath the fil­ter hous­ing.

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