MBE 4000 – Section 1.4 EGR Cylinder Head and Block

Section 1.4
EGR Cylinder Head and Block

There are several minor changes in the cylinder liner, block and engine lifter brackets between the MBE 4000 EGR engine and the non-EGR engine.‪

Section 1.4.1
EGR Cylinder Head Installation

Be aware of the following notice when installing the cylinder head on an EGR engine:‪

NOTICE:
Be sure the carbon scraper ring is seated in the groove on the top part of the cylinder liner before installing a new cylinder head gasket and the cylinder head, otherwise component damage can result. See Figure "Installed Carbon Scraper Ring" .‪

1. Cylinder Liner‪	3. Installed Piston‪
2. Carbon Scraper Ring‪	4. Carbon Scraper Ring located in groove in cylinder liner‪

Figure 1. Installed Carbon Scraper Ring

Note: All remaining installation procedures for the cylinder head are identical to a non-EGR engine.

Section 1.4.2
Cylinder Head Changes

There is also drilling in the head to attach the new EGR cooler support bracket. There is hardening at block division face of cylinder head also. See Figure "EGR Cylinder Head Changes" .‪

1. Drilling to attach the EGR Cooler Support Bracket‪

2. Hardening at Block Division Face‪

Figure 2. EGR Cylinder Head Changes

Section 1.4.3
Cylinder Liner Changes

One difference between the non-EGR cylinder liner to the EGR model is a groove on the top part of the cylinder liner, which houses the carbon scraper ring. See Figure "Installed Carbon Scraper Ring" . The carbon scraper ring for the EGR engine is in the area previously hardened in the non-EGR cylinder liner. Its purpose is to inhibit coke formation.‪

Section 1.4.4
Cylinder Block Changes

The cylinder block has two additional openings machined in the block. There is now an opening near the air compressor housing and an opening flange for attaching the coolant inlet pipe going to the EGR cooler. See Figure "EGR Cylinder Block Changes" .‪

1. Opening near the air compressor housing‪

2. Flange for attaching coolant inlet pipe‪

Figure 3. EGR Cylinder Block Changes