Main Bearing Selection

Crankshaft Counter Weights:

1) Location size numbers on the crankshaft counter weights as illustrated below:

Surface Of The Engine Block:

2) Locate the size numbers on the oil pan mating surface of the block as illustrated below:

Main Bearing Size Number Location:

3) The correct main bearing number is obtained by adding the crankshaft number to the number on the block.


Crankshaft
+ Block = Main bearing number
size number size number to be used


Example: 0 + 2 = 2

Number on + Number on = Main bearing number
crankshaft block to be used


Possible Combinations

Cylinder Block
No.. 1 2 1 3 2 1 3 2 3
Crankshaft No. 0 0 1 0 1 2 1 2 2
Bearing No. 1 2 2 3 3 3 4 4 5
4) After selecting the proper size bearing, check the oil clearance with plastigauge.


Clearance Specs.


Standard clearance: 0.034 - 0.058 mm (0.0013 - 0.0023 in.)
Maximum clearance: 0.08 mm (0.0031 in.)


If clearance is not within specifications, another size bearing must be selected and oil clearance rechecked. If the proper clearance cannot be obtained, the crankshaft must be replaced or ground.

NOTE: All crankshafts and engine blocks supplied through parts, use this method of bearing size selection.