ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 011-009   Exhaust Restriction

When measuring exhaust restriction, it is preferred that the measurement point be within one pipe diameter of the turbocharger outlet.

If this requirement can not be met, make sure to inspect the exhaust outlet tubing between the turbocharger outlet and the exhaust pressure tap location for damage to the exhaust piping.

Use INSITE™ electronic service tool to check for fault codes. If any are present, follow the troubleshooting steps as outlined in the corresponding fault code troubleshooting procedure.

Connect pressure gauge, Part Number ST-1273, to the pressure tap in the exhaust head pipe or at the inlet of the muffler, diesel oxidation catalyst, or exhaust gas filter.

Operate the engine at rated speed and load. Record the exhaust restriction.

Exhaust Restriction – Muffler

Exhaust Restriction – Diesel Oxidation Catalyst

Exhaust Restriction – Exhaust Gas Filter

If the exhaust restriction exceeds the specifications inspect:

1. The exhaust piping for damage. Refer to the OEM service manual.
2. The diesel oxidation catalyst and/or muffler. Refer to the OEM service manual.
3. The exhaust gas filter (if equipped). Refer to the OEM service manual.

Remove the test equipment.

Install and tighten the pipe plug.