5-101.bk Page 3 Friday, March 17, 2006 11:05 AM ENGINE MODEL IDENTIFICATION For some current MACK engines, the engine information plate also includes pertinent emissions characteristics of NO x and particulates unique to that engine. Engine Information Plate A given MACK engine may meet federal emission regulations in 49 states (excluding California) or an engine may meet emission regulations of all 50 states (including California). To determine which regulations a given engine meets, refer to the engine information plate. If the engine plate has a series of dashes in the long upper-left block, and two dashes in the CALIF. FAMILY block, the engine does not meet California regulations.
All engines are identified by an engine information plate located on the front valve cover of the engine. This plate indicates the engine’s 11GBA number, emission standards, serial number and various engine adjustments. The engine is also identified by the serial number stamped into the cylinder block above the timing cover on early engines, or on the pad just to the rear of the air compressor on later engines. Figure 3 — Engine Information Plates New Engine Information Plate Block 2 — California Regulations The following explanations are provided to aid in interpreting some of the key information found on the new engine information plate (effective late 1996). Refer to Figure 1-4.
An “X” in block two indicates the engine meets California emissions regulations for the year stamped in block No. four. This engine is referred to as a “50-state” engine and can be sold in any state throughout the U.S. Block 1 — U.S. EPA Regulations An “X” in block one means the engine meets United States EPA regulations for the year stamped in block No. four. Two dashes stamped in block two means the engine does not meet California emissions regulations. If an engine has an “X” in block one and two dashes in block two, it is referred to as a “49-state” engine, meaning it is not certified for sale in California.
Two dashes in block one indicates the engine does not meet United States EPA regulations for the year stamped in block No. four. This is only permissible with certain export engines. All domestic engines will have an “X” in block one. Page 1-3 2 00 GENERAL INFORMATION