4.7.17. Installation of a bent shaft and check of working gaps of radical bearings

Inserts of radical bearings are recommended to be replaced regardless of their state.

Installation of a bent shaft is the first step of the procedure actually of assembly of the engine. It is meant that at this stage the bent shaft and the block of the engine are already properly cleaned, checked and subjected to necessary recovery repair.

 PERFORMANCE ORDER

  1. Turn the engine upside down.
  2. Give fixing bolts, uncover radical bearings and spread out them on a workbench as installation on the engine.
  3. If did not do it yet, take from the beds in the block and covers old inserts of radical bearings. Wipe beds pure неворсящейся with rags - they have to be perfectly pure.

Check of working gaps of radical bearings

Try not to touch surfaces of new inserts barehanded in order to avoid undesirable contact of bearings with always with the traces of oil and chemically aggressive substances which are present at fingers.


 PERFORMANCE ORDER

  1. Wipe backs of new inserts of radical bearings and enclose the halves equipped with an oil flute in the beds in the block (if old inserts are used, track that they kept within strictly on the former places). Enclose the remained halves of inserts in the corresponding covers of bearings. Track that uvulas of inserts entered reciprocal landing grooves in beds of the block and covers Oil openings in the block have to be the correct image combined with openings in inserts.

Uvulas of locks of inserts have to get to reciprocal grooves in beds of bearings

You make by no means attempts to begin to knock an insert resistant to installation in the bed the hammer. Grease with nothing bearings at this stage!

  1. Remember that the combined insert equipped with persistent half rings keeps within the top bed of the third radical bearing.

The top insert of the third radical bearing is equipped with persistent half rings; on all engines of a half ring make a whole with an insert

  1. Wipe the surfaces of bearings in the block and radical necks of a bent shaft pure неворсящейся with rags.
  2. Check passability of oil openings of a shaft, in case of need clean them. Any foreign particles which are contained in maslotoka, eventually, inevitably get to bearings.
  3. Accurately lay carefully wiped bent shaft in radical bearings of the block (do not use any lubricant).
  4. Before finalizing a shaft, it is necessary to check sizes of working gaps in its radical bearings.
  5. Cut the calibrated plastic wire from the measuring Plastigage set pieces, length width of inserts are slightly shorter, and lay on one piece of a wire along each of radical necks of a shaft, parallel to their axis.

Pieces of the calibrated wire from the measuring Plastigage set keep within from above on radical necks of a shaft, strictly parallel to an axis of the last

  1. Wipe surfaces of inserts in covers and establish the last on the regular places (track correctness of orientation of marking). Try not to shift the pieces of the calibrated wire laid along shaft necks. Slightly oil a carving of fixing bolts and screw them, having recorded covers.
  2. Moving on a spiral from the center outside, in three stages tighten bolts of fastening of covers with the required effort (see Specifications in the Head Dvigateli), - do not allow a shaft provorachivaniye in the course of tightening of fixture!
  3. Turn out bolts and carefully uncover radical bearings. Put uncovered as an arrangement them on the engine. Try not to damage the flattened-out calibrated wire and do not turn a shaft. If any of covers does not give in to removal, for release accurately tap it the hammer with soft brisk.
  4. Determine the size of working gaps of bearings by width of the flattened-out threads measured on the scale applied on packing of the Plastigage set Compare results of measurements to requirements of Specifications in the Head Dvigateli.

Definition of working gaps in radical bearings by measurement of width of the flattened-out calibrated wire on the scale applied on packing of the Plastigage set (do not confuse an inch scale to metric)

  1. If the size of a gap goes beyond admissible limits, perhaps, inserts not of that standard size were established (see the Section Check of a Condition of Radical and Conrod Bearings of a Bent Shaft). Before looking for new inserts, make sure that under enclosed at this stage foreign particles did not get. If the calibrated wire is flattened out since one end more than from another, it demonstrates existence of conicity of a neck (see the Section Check of a Condition of a Bent Shaft).
  2. Carefully remove the flattened-out calibrated wire from necks, having scratched out all its traces some not too strong tool (for example, edge of an old credit card). As a last resort, it is possible to use own nail, - the main thing that on a surface of necks/inserts there is no scratch left and zadir.

Final installation of a bent shaft

 PERFORMANCE ORDER

  1. Carefully take a bent shaft from the engine.
  2. Wipe the surfaces of bearings in the block and evenly grease them with a thin layer of molibdensoderzhashchy or assembly motive lubricant. Do not forget to grease also persistent surfaces also.

Try not to allow hits of lubricant on backs of inserts!

  1. Make sure of absoluteness of purity of necks of a bent shaft, then grease (the same lubricant or pure motive oil) the surfaces of pins contacting to epiploons. Lay a shaft on the regular place. Wipe and grease inserts in covers of bearings. Track that persistent inserts were laid in a bed of the corresponding bearings in the block.
  2. Install covers of bearings on the engine. At first covers of the 1st and 4th bearings (the first the bearing, the next to the GRM drive is) are established, - track that the marking applied on covers was read at a view of the engine behind. Side flutes in a cover of the 5th (back) bearing before installation should be filled with sealant of type No. 90485251.

Flutes on both sides of a cover of the fifth (back) radical bearing should be filled with sealant (black)

  1. Slightly grease a carving part and the lower surfaces of heads of fixing bolts with pure motive oil, then screw and by hand tighten bolts.
  2. Moving on diagonal from the center to edges, evenly tighten all bolts with effort of the first stage, then, in the same order hold on them on corners of stages 2 and 3 (see Specifications in the Head Dvigateli), - use a goniometric nozzle, or put with paint or a marker basic tags. Having held on bolts, fill a little more sealant in flutes of a back cover until it begins to be squeezed out of them, - wipe surplus with pure rags.
  3. Knock on end faces of pins of a shaft with the hammer through a brass or lead drift for the purpose of alignment of persistent surfaces and shrinkage of a shaft before final tightening of fixture.
  4. Several times turn a bent shaft manually, checking freedom of its rotation.
  5. In conclusion by means of the probe of lezviyny type or the dial measuring instrument determine the size of an axial side play of a shaft (see the Section Removal of a Bent Shaft). If persistent surfaces of a shaft are not worn-out and are not damaged, and bearings are replaced new, the size of a side play should not exceed the limit of admissible range.
  6. Install conrod and piston assemblies (see the Section Installation of Conrod and Piston Assemblies and Check of Size of Working Gaps in conrod bearings of a bent shaft).
  7. At the corresponding complete set put the new directing plug of a main shaft of the transmission in a back pin of a bent shaft.
  8. Installation of new epiploons of a bent shaft is made according to the instructions stated in appropriate sections of Parts of the Procedure of repair of petrol SOHC engines without their extraction from the car, the Procedure of repair of petrol DOHC engines without their extraction from the car or the Procedure of repair of diesel engines without their extraction from the car of the present manual.
  9. At the corresponding complete set establish a cast bridge sheaf on covers of radical bearings, screw and tighten bolts of its fastening with the required effort.
  10. Further assembly of the engine is made in compliance by the instructions provided in appropriate sections of the Part of the Procedure of repair of petrol SOHC engines without their extraction from the car, the Procedure of repair of petrol DOHC engines without their extraction from the car or the Procedure of repair of diesel engines without their extraction from the car of the present manual.