5-101.bk Page 23 Friday, March 17, 2006 11:05 AM
200 BENCH PROCEDURES 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 200285a
Figure 5-23 — Combustion Chamber Design
Refer to Figure 5-24. 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
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 brasswire brush to clean the circular groove.
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