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4-6-zamena-remnya-privoda-grm.html
4.6. Replacement of a belt of a drive of GRM
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Do not bend and do not overwind a belt!
After removal of a gas-distributing belt do not turn cranked and camshafts in order to avoid damage of internal components of the engine as a result of an entrance of blow of valves about the bottoms of pistons!
Before belt installation carefully clear all cogwheels of a drive of GRM, having completely removed from them dirt, greasing and moisture!
Installation of a gas-distributing belt should be made on the cold engine!
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Details of installation of components of a drive of GRM
Removal
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- Cock the parking brake, prop up back wheels protivootkatny boots, then поддомкратьте a front of the car and establish it on props (see an illustration the Scheme of an institution of props for car fixing in the lifted situation). At the corresponding complete set remove protection of a case.
- Empty a radiator — try not to allow hits of cooling liquid on driving belts.
- Remove a radiator.
- Remove the fan of system of cooling and a pulley of the water pump.
- Remove belts of a drive of the steering pump, the To/in compressor and the generator.
- Turn out all spark plugs.
- Remove the distributor filter.
- Remove a basic arm of an intermediate roller of a belt of a drive of the К/В compressor.
- Lift the receiver connecting cover of the gas-distributing mechanism with an air inlet sleeve.
- Remove the hose of an okhladitelny path brought to the thermostat.
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- Turning a cranked shaft for a bolt of its pulley, bring the engine into the provision VMT of the end of a step of compression of the piston of the first cylinder.
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- Turn out a bolt of a pulley of a cranked shaft and by means of a suitable stripper dismantle the last.
- Remove the top and bottom sections of a forward cover of a drive of GRM.
- Achieve combination of a dot adjusting label of a cogwheel of the left camshaft with a reciprocal label on the top section of a back cover of a drive of GRM.
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- Make sure of correctness of combination of an adjusting label of a cogwheel of a cranked shaft with risky on the case of the oil pump.
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- Temporarily establish into place a bolt of a pulley of a cranked shaft, having provided with that possibility of a provorachivaniye of the last.
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- Weaken a nut of a natyazhitel, develop assembly of the last and remove a gas-distributing belt.
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Condition check
Typical defects of a gear belt of a drive of GRM
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- Attentively study a condition of the removed belt, in case of detection of defects (see an illustration Typical defects of a gear belt of a drive of GRM) make its replacement.
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- Manually check freedom of rotation of a roller of a natyazhitel.
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- Estimate a condition of a spring of a natyazhitel.
- Defective components replace.
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Installation
Details of installation of a cover of a drive of GRM
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- Make sure that the engine on the former is in the provision VMT of the end of a step of compression of the piston of the first cylinder.
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- Establish into place a natyazhitel with a spring.
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If turned out a fixing hairpin, before a vvorachivaniye in the engine block it is necessary to grease its carving part with fixing hermetic. |
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By means of a prutkovy key develop a natyazhitel against the stop outside and temporarily tighten a nut of his fixing.
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Having tracked correctness of combination of adjusting labels, establish a belt — white lines on a tape of a belt should be combined with dot adjusting labels on cogwheels distributive and cranked in bulk. Make sure that the belt is planted so that the arrow put on its tape specified aside from the engine (to a forward cover of a drive of GRM).
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On the Infiniti QX4 models considered in the real Management equipped with the engine of 3.3 l, it is used 133 - a zuby gas-distributing belt. At installation between cogwheels of camshafts there should be 40 teeths of a belt, between wheels of the left distributive and cranked shaft — 43 teeth. |
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Holding a natyazhitel a prutkovy key, weaken a nut fixing it.
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Prutkov a key develop a natyazhitel on 70 — 80 degrees clockwise and again temporarily tighten a nut.
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Turn a cranked shaft clockwise a minimum on two complete revolutions, having in summary brought it into the provision VMT of the end of a step of compression of the piston of the first cylinder.
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Press a belt tape on a site between a cogwheel of the right camshaft and a roller of a natyazhitel with effort of 98 N (10 kgfs).
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Fill an edge measuring щупа with thickness of 0.35 mm and width of 1 2.7 mm in a gap between a tape of a belt and a tension roller.
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Slowly turning a cranked shaft clockwise, completely involve an edge щупа under a belt.
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The belt at a provorachivaniye of a shaft should move approximately on 2.5 teeth. |
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- Holding a natyazhitel a prutkovy key, tighten a nut fixing it.
- Having slightly developed a cranked shaft in any direction, take щуп.
- Turn a cranked shaft clockwise a minimum on two complete revolutions, having in summary brought it into the provision VMT of the end of a step of compression of the piston of the first cylinder.
- Establish the top and bottom sections of a forward cover of a drive of GRM (see an illustration of the Detail of installation of a cover of a drive of GRM).
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Check of effort of a tension of a belt
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- Bring the engine into the provision VMT of the end of a step of compression of the piston of the first cylinder.
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- Measure size of a deflection of a belt on a site in the middle between cogwheels of camshafts when applying to an effort tape in 98 N (10 kgfs). Demanded value makes 13 — 15 mm.
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