Cylinder Block Repair


  1. BORE CYLINDER

Cylinder Block -- Repair


HINT:
  1. Bore all 4 cylinders to fit the O/S piston outside diameter.
  2. Replace all the piston rings with ones to match the O/S pistons.


1. BORE CYLINDER

  1. Prepare 4 new O/S pistons.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.5L-E Engine Mechanical.Engine.Cylinder Block Repair
  1. Standard piston diameter:
    Item
    		Specified Condition
    O/S 0.50
    		99.950 to 99.980 mm (3.935 to 3.936 in.)
    Using a micrometer, measure the piston diameter at right angles to the piston pin center line where the distance from the piston head is as specified.
    Standard distance:
    61.27 to 61.33 mm (2.412 to 2.415 in.)
    Text in Illustration
    *1
    		Front Mark
    *2
    		Size Mark
    *a
    		Distance

  1. Calculate the amount each cylinder is to be rebored as follows.

    HINT:
    1. Size to be rebored = P + C - H
    2. P = Piston diameter
    3. C = Piston clearance: 0.040 to 0.060 mm (0.00157 to 0.00236 in.)
    4. H = Allowance for honing: 0.02 mm (0.000787 in.) or less

  1. Bore and hone the cylinders to the calculated dimensions.

    Maximum honing:
    0.02 mm (0.000787 in.)
    NOTICE:
    Excess honing will destroy the finished roundness.