ISL 8.9 Valve & Jake Brake Adjustment: Specs & Tools
For a 2004 Cummins ISL 8.9, intake valve clearance is 0.006-0.010" and exhaust is 0.018-0.022". Jake brake clearance is 0.022-0.026". Use Cummins tool 3823510 for jake brake adjustment.
For a 2004 Cummins ISL 8.9, intake valve clearance is 0.006-0.010" and exhaust is 0.018-0.022". Jake brake clearance is 0.022-0.026". Use Cummins tool 3823510 for jake brake adjustment.