Renault Megane, Scenic

Since 1996 of release

Repair and car operation

Removal, survey and installation of a cam-shaft and pushers

At installation can be used a new epiploon from outside drive a belt and a new lining клапанной covers. For covers of bearings of a cam-shaft hermetic, and for bolts of fastening of a cover of the bearing - taking компаунд is required.

REMOVAL

1. Remove a cam-shaft cogwheel as Removal at installation of cogwheels drive a belt and the tension mechanism is described in Section. 2. Remove the mechanism of a tension gear drive a belt as Removal at installation of cogwheels drive a belt and the tension mechanism (address to an accompanying illustration) is described in Section. 3. Turn away two bolts, fastening an internal cover of a gear belt to the block of cylinders (address to an accompanying illustration). 4. Turn away the bottom bolts, fastening an internal top cover of a gear belt to the block of cylinders. 5. Turn away a bolt of fastening of an intermediate pulley gear drive a belt which also passes through an internal cover. 6. Separate an internal cover and if it is possible, remove it. 7. Remove the vacuum pump as it is described in the Head Brake system. 8. For access improvement, release from fastenings hoses which take place by the top part клапанной covers, and move them aside. If топливопроводы are separated, закупорьте the open ends to prevent dirt penetration. 9. Turn away a nut or bolts and remove клапанную a cover. Remove a lining. 10. By means of a micrometer measure an axial backlash of a cam-shaft and compare it to the size resulted in Specifications (address to an accompanying illustration). 11. If the old cam-shaft is established, at this stage it is recommended to measure backlashes of valves as it is described in Section Check and adjustment of backlashes of valves. 12. Check up presence of labels on covers of bearings of a cam-shaft not to mix them at installation, if necessary mark them so that they could be established on former places. Number covers. 13. Gradually ослабьте bolts and racks of fastening of covers of bearings in regular intervals reducing pressure of springs of valves. Remove bolts and racks (having remembered their arrangement) and then - covers of bearings. Pay attention that the cover of the bearing №1 fastens two racks and two additional bolts. 14. Lift a cam-shaft together with an epiploon (address to an accompanying illustration). Put them in boxes with branches, or on the pure piece of a cardboard divided into eight parts. Write down a thickness of adjusting washers - this data will be necessary later at adjustment of backlashes of valves. The thickness of a washer is specified on the bottom party, but measure it by means of a micrometer as as a result of deterioration the thickness of a washer can appear less is better, than it is specified on it.

SURVEY

1. Examine working surfaces of bearings of a cam-shaft and working surfaces of cams on presence of the developed places, corrosion or scratches. Replace a cam-shaft at detection of the given damages. 2. After each removal replace a cam-shaft epiploon from outside drive a belt. Before installation of a new epiploon grease its sealing edges. 3. Examine working surfaces of bearings of a cam-shaft in a head of the block of cylinders and covers of bearings. If there are deep scratches or other damages, it is necessary to replace a head of the block of cylinders. 4. Examine pushers and adjusting washers on presence of scratches, corrosion and the developed places. Replace as required.

INSTALLATION

1. Establish all pistons in an average part of cylinders as Removal at installation of cogwheels drive a belt and the tension mechanism is described for cogwheel removal in Section. 2. Grease pushers and establish them on the places. Establish a washer marked by the party downwards. 3. Grease cam-shaft bearings. Place a cam-shaft together with an epiploon on a head of the block of cylinders. The epiploon should be placed so that it settled down level with a surface of a head of the block of cylinders. 4. Put hermetic (CAF 4/60 THIXO, Rhodorseal 5661 or another approaching) on combined surfaces of a head of the block of cylinders in installation sites of the right and left covers of bearings of a cam-shaft (№1 and №5). 5. Establish covers on the places, watching that the right epiploon has correctly settled down in a bearing cover. 6. Put some drops taking компаунда on a carving of bolts and racks of fastening of covers of bearings. Establish bolts and racks, and gradually tighten their effort resulted in Specifications. 7. If the new cam-shaft is established, measure an axial backlash and be convinced that it corresponds to the data resulted in Specifications. 8. Establish the vacuum pump as it is described in the Head Brake system. 9. Establish an internal top cover of a gear belt, then establish and tighten bolts, fastening it to the block of cylinders and a head. 10. Establish and tighten a bolt, крепящий assemblage of an intermediate pulley gear drive a belt. 11. Establish the mechanism of a tension gear drive a belt, watching that the ledge on the block of cylinders has entered into an aperture in an arm of the mechanism of a tension. 12. Establish a cam-shaft cogwheel as Removal at installation of cogwheels drive a belt and the tension mechanism is described in Section. 13. Check up backlashes of valves as it is described in Section Check and adjustment of backlashes of valves, and if necessary adjust them, having picked up washers of the necessary thickness. 14. Establish клапанную a cover, using if necessary a new lining, and tighten fixing nuts or bolts the effort resulted in Specifications. 15. Establish/connect hoses which have been moved for access improvement. If топливопроводы have been separated, connect them, and then pump over fuel system as it is described in the Head of the Power supply system and release. 16. Attach a weight cable to the battery.