2.13. Bent shaft

Removal

 PERFORMANCE ORDER

  1. Take off a gear belt, a forward cover, a flywheel, a head of cylinders and the oil pallet.
  2. Remove a back cover from the block of cylinders and a back sealing ring of a bent shaft.
  3. Turn off nuts and uncover rods.

Mark covers of radical bearings of a bent shaft to install them on the places and in the same situation.

  1. Turn out bolts and remove a basic cover of radical bearings of a bent shaft and a bent shaft.

Check

 PERFORMANCE ORDER

  1. Check necks of radical and conrod bearings of a bent shaft for lack of wear and development. Check lubricant openings of a bent shaft for lack of a contamination.
2. Measure by a micrometer diameters of necks of a bent shaft in two opposite directions. With conicity or ovality to a pereshlifuyta a bent shaft.

Diameter of radical necks: 60,002 – 60,020 mm
Diameter of conrod: 50,008 – 50,026 mm

Inserts of conrod and radical bearings

Check connecting and radical rods for lack of local corrosion, development and other damages. If necessary, replace inserts.

Measurement of a gap of radical and conrod bearings

For measurement of a gap of radical and conrod bearings measure diameters of necks of a bent shaft and the corresponding internal diameters of bearings. The size of a gap is a difference between the internal diameter of the bearing and the corresponding diameter of a neck of a bent shaft.

Gap of radical bearings of a bent shaft: 0.024 – 0.042 mm
Gap of conrod bearings of a bent shaft: 0,024–0,042 mm

Plastigauge method

Most precisely and conveniently for measurement of a gap of radical and conrod bearings with use of the plastic calibrated Plastigauge core

 PERFORMANCE ORDER

  1. Clear radical and conrod necks of a bent shaft of lubricant, and blow lubricant openings compressed air.
  2. Install inserts of radical bearings on the block of cylinders of the engine. Cut off the pieces of a plastic core of Plastigauge equal to width of bearings and put them along an axis on inserts of radical bearings of a bent shaft.
  3. Install a bent shaft on inserts of radical bearings in the block of cylinders. According to marking establish inserts of radical bearings and a basic cover. In a certain sequence tighten bolts of fastening of a basic cover of radical bearings of a bent shaft. Do not turn a bent shaft of the engine at measurement of a gap of radical bearings of a bent shaft. Turn out bolts and remove a basic cover of radical bearings of a bent shaft. Measure by a measuring template width of the deformed plastic core of Plastigauge and determine gap size.

Oil sealing rings

Check lobbies and back oil sealing rings for absence of damage or wear of working edges. With any defects replace a sealing ring.

Basic cover of bearings

After installation of a basic cover of bearings turn a bent shaft and be convinced that it rotates easily and smoothly, and its axial side play corresponds to the values given in the specification. Axial side play of a bent shaft: 0,09 – 0,32 mm.

Drive plate

Replace the drive plate deformed, damaged or having cracks.

Flywheel

 PERFORMANCE ORDER

  1. Check a condition of the surface of a flywheel contacting to a clutch plate. With considerable wear replace a flywheel.
  2. Check a beating of the surface of a flywheel contacting to a clutch plate. Beating: 0,13 mm3.
  3. Check a condition of a gear wreath of a flywheel for absence of damage and wear and if necessary replace it.

Installation

 PERFORMANCE ORDER

  1. Install the top inserts of radical bearings with flutes for supply of oil on the block of cylinders of the engine. At repeated installation of inserts establish them on the same place in which they were before removal.
  1. Establish inserts of radical bearings without flutes in a basic cover of radical bearings of a bent shaft.
  1. Establish the lower central insert of the radical bearing without flute. Establish the top central insert of the radical bearing with a flute.
  2. Before installation of a bent shaft apply a thin film of pure engine oil on all surfaces of sliding. Install a bent shaft on inserts of radical bearings in the block of cylinders.
  3. Establish a basic cover, at the same time use Loctite 5205 sealant.
  4. Tighten the required moment bolts of fastening of the support plate. Inhaling moment: – 15 mm: 28–32 to tighten on a corner 120 ° – 12 mm: 33,7–37,7.
  5. Tighten bolts for 4 or 5 passes.
  6. Turn a bent shaft and check that it rotates easily and smoothly. Establish a measuring tip of the indicator of hour type on a forward end face of a bent shaft. Move a bent shaft along an axis against the stop and establish a scale of the indicator of hour type on zero. Move a bent shaft along an axis to other party against the stop and read values of an axial side play on an indicator scale.
  1. Grease an external surface of a new sealing ring with engine oil. Establish by the special tool 09231-21000 a sealing ring against the stop in a cover nest.

Cars with the mechanical transmission

  1. Establish a flywheel and fix by bolts having tightened them according to the specification. Inhaling moment: 70–80 N • m.

Cars with the automatic transmission

  1. Establish a plate of the drive and fix by bolts having tightened them according to the specification. Inhaling moment: 70–80 N • m.