Connecting rod lower head bore (Defender 2007+)

1. Measure the connecting rod head bore in two directions. The difference in measurements is the deviation of the connecting rod head bore from roundness (ovality). Make sure that the deviation from roundness is within the norm.

2. Measure the connecting rod head bore diameter in two directions. Make sure that the connecting rod head bore diameter is within the standard.

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Article review: Saveliy Ushakov

Camshaft cam lift height
Deformation (warping) of the mating surface of the cylinder block
Deformation (warping) of the mating surface of the cylinder head
Piston pin diameter
Camshaft journal diameter
Valve stem diameter
Valve spring free length
Piston ring joint gap

Current article

Connecting rod lower head bore

Deviation of the cylinder bore shape from roundness
Cleaning and inspection of the exhaust manifold
Cleaning the connecting rod
Radial clearance in the camshaft journal
Matching the piston pin to the piston hole

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Defender 2007+