To determine if a restrictive air cleaner is causing excessive black or gray smoke, perform the following:
1. Remove the air filter element from the air cleaner container; refer to OEM guidelines.
2. Visually inspect the air cleaner element for damage or clogging.
[a] If no damage or clogging is found, check the charge air cooler; refer to section 8.3.
[b] If damage or clogging is found, refer to section 8.2.1.
Air Filter Element Replacement
Perform the following to replace the air filter element:
1. Remove and replace the damaged or clogged air filter element; refer to OEM guidelines.
2. Verify air filter element replacement; refer to section 18.104.22.168.
Test the Engine with Replaced Air Filter Element
Perform the following to determine if the new filter element resolved excessive exhaust smoke:
1. Start and run the engine.
2. Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
3. Visually inspect exhaust for excessive smoke.
[a] If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
[b] If the engine exhaust emission is excessively black or gray, shut down the engine. Check the charge air cooler; refer to section 8.3.