5-101.bk Page 23 Friday, March 17, 2006 11:05 AM 1989/1990 E7 COMBUSTION SYSTEM ORIGINAL SWIRL LEVEL 6-HOLE NOZZLE TIPS 1991 AND LATER E7 COMBUSTION SYSTEM INCREASED SWIRL LEVEL 8-HOLE VCO NOZZLE TIPS Figure 5-23 — Combustion Chamber Design 200285a Refer to Figure 5-24. and has two inlet and two exhaust valves per cylinder. Circular grooves correspond with the fire ring bead on cylinder sleeves. This design sets the fire ring over the liner, the lip and into groove of the cylinder head while providing a positive combustion pressure seal. Use a rotary brass- wire brush to clean the circular groove. The cast iron cylinder head is constructed using a special iron alloy.
The head contains cored inlet, exhaust and coolant passages, drilled oil passages, replaceable inlet and exhaust guides and seats, various drilled passages and tapped holes. Each cylinder head covers three cylinders Page 5-23 200 BENCH PROCEDURES