Cummins 4BT – Camshaft Bushing – Replacement

Remove the camshaft bushing from the No. 1 bore.

Mark the camshaft bushing and cylinder block so you can align the lubricating oil hole in the cylinder block with the
lubricating oil hole in the bushing.

Install the camshaft bushing so that it is even with the front face of the cylinder block.

Be sure the lubricating oil hole is aligned.
A 3.2 mm [0.128 in] diameter rod must be able to pass through the lubricating oil hole.

Measure the installed camshaft bushing.