49146 Mercruiser PLUG, PIPE - CYLINDER BLOCK (3/4")

Table 1
J1939 Code and Description CDL Code and Description Comment
1352-15
Engine Cylinder #1 Knock Level : High - least severe (1) E401 (1)
Cylinder #1 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1353-15
Engine Cylinder #2 Knock Level : High - least severe (1) E402 (1)
Cylinder #2 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1354-15
Engine Cylinder #3 Knock Level : High - least severe (1) E403 (1)
Cylinder #3 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1355-15
Engine Cylinder #4 Knock Level : High - least severe (1) E404 (1)
Cylinder #4 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1356-15
Engine Cylinder #5 Knock Level : High - least severe (1) E405 (1)
Cylinder #5 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1357-15
Engine Cylinder #6 Knock Level : High - least severe (1) E406 (1)
Cylinder #6 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1358-15
Engine Cylinder #7 Knock Level : High - least severe (1) E407 (1)
Cylinder #7 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1359-15
Engine Cylinder #8 Knock Level : High - least severe (1) E408 (1)
Cylinder #8 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1360-15
Engine Cylinder #9 Knock Level : High - least severe (1) E409 (1)
Cylinder #9 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1361-15
Engine Cylinder #10 Knock Level : High - least severe (1) E410 (1)
Cylinder #10 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1362-15
Engine Cylinder #11 Knock Level : High - least severe (1) E411 (1)
Cylinder #11 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged.
1363-15
Engine Cylinder #12 Knock Level : High - least severe (1) E412 (1)
Cylinder #12 Detonation The level of detonation has exceeded the trip point.
Gas substitution is reduced until the level detonation goes below the trip point.
The code is logged. Probable Causes
Codes
Gas fuel quality
Engine overload
Excessive inlet air pressure
Inlet air temperature
Incorrect timing calibration
Detonation sensor
Excessive deposits
Cylinder misfire
Valve lash
Low inlet manifold air temperature
Air/fuel ratioRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result:An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check the Gas Fuel Quality
A. Obtain a gas sample. Refer to Operation and Maintenance Manual for directions using Gas Engine Rating Program (GERP) to determine the Methane Number.
Methane Number
Result: The methane number is OK.
Proceed to Test Step 3.
Result: The methane number is NOT OK.
Repair: Refer to Application and Installation Guide, LEBW4977, "Gaseous Fuels" to make sure the proper quality and filtration is being used.
If the problem is not resolved, proceed to Test Step 3.
3. Check for Engine Overload
Note: When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel.
Load
Result: The engine is not being overloaded.
Proceed to Test Step 4.
Result: The engine is being overloaded.
Repair: Reduce engine load to an acceptable limit.
If the problem is not resolved, proceed to Test Step 4.
4. Check for Excessive Inlet Air Pressure
Note: The calculated engine load will increase as the inlet air pressure increases.
A. Measure the inlet air pressure during engine operation with a load. For specific data on the engine, refer to the performance data sheet for the engine.
Air Pressure
Result: The code was not logged during a heavy load.
Proceed to Test Step 5.
Result: The code was logged during a heavy load.
Repair: Reduce the load on the engine.
If the problem is not resolved, proceed to Test Step 5.
5. Check for High Inlet Air Temperature
A. Check for a restriction to the air flow through the aftercooler.
Air Temperature
Result: The inlet air temperature is OK.
Proceed to Test Step 6.
Result: The inlet air temperature is NOT OK.
Repair: Determine the reason for high inlet air temperatures. Repair or replace damaged components.
If the problem is not resolved, proceed to Test Step 6.
6. Incorrect Timing Calibration
A. Perform a timing calibration on the engine.
Note: Only perform this procedure if work on the engine may have affected the engine timing. Also, perform this procedure if the engine speed/timing sensor has not been calibrated
Timing Calibration
Result: The timing calibration is not correct.
Repair: Refer to Troubleshooting, "Timing - Calibrate".
Verify that the repair eliminated the problem.
Result: The timing calibration is correct.
Proceed to Test Step 7.
7. Inspect for Excessive Deposits in the Combustion Chamber
A. Overfilling of engine oil can lead to deposits. Check the oil level.
B. Use a borescope to inspect the cylinders. Look for the following conditions:
- Deposits on the valve seats
- Deposits on the valve faces
- Deposits on the cylinder walls that are above the upper limit of the piston stroke
- Signs of internal leaks
Note: Signs of internal leaks include excessive consumption of engine oil, blue smoke, and excessive detonation.
Deposits
Result: Deposits and/or signs of internal leaks are not found.
Proceed to Test Step 8.
Result: Deposits or signs of internal leaks are found.
Repair: Investigate the cause