Service Manual

Air Compressor ISB, ISBe and QSB (Common Rail [...]
Page 12-28 Section 12 - Compressed Air System - Group 12
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NOTE: For low mount designs, it is important to make
sure of appropriate positioning of the air compressor
relative to the engine block in order to minimize gear last.
This will help minimize noise from the gear train during
normal engine operation.
Loosen the six air compressor mounting capscrews.
Push the air compressor assembly as close to the engine
block as possible and tighten the upper mounting
capscrew (1).
Torque Value: 77 N•m [ 57 ft-lb ]
Using the upper mounting capscrew as a pivot point,
rotate the air compressor assembly in the clockwise
direction when viewed from the front of the engine.
NOTE: This action should slightly move the bottom of the
air compressor assembly towards the engine block.
Tighten the lower mounting capscrew (1).
Torque Value: 77 N•m [ 57 ft-lb ]