DESCRIPTION & OPERATION
Page 25
ENGINE BRAKE FEATURES
Refer to Figure 22.
There are major valve train changes relative to
engine brake implementation on the E-Tech™
engine. The most evident changes include:
r A significantly larger brake unit with a
different appearance and operating concept
than the E7.
r Standard E-Tech™ valve yokes are used at
all positions. The special Jacobs exhaust
yokes on the E7 engine are not used. Note
that the E-Tech™ engine uses a different
valve yoke from the E7 engine. The E7 and
E-Tech™ yokes are not interchangeable.
r A hollow yoke adjusting screw with a floating
pin in the screw is used in the exhaust
yokes. The screw opens only the exhaust
valve directly beneath it when the
J-Tech™ engine brake is activated.
r Unique exhaust rocker arm adjusting screws
and nuts (Figure 21).
21
Figure 21 — Rocker Arm Adjusting Screws and Nuts
22
Figure 22 — J-Tech™ Brake Valve Yoke Hollow Adjusting Screw Arrangement
5_106_00.bk Page 25 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
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