GMC T Series 1994 Repair Manual page 463

2
. Bolts and studs (4).
3. Tab washers (3) and washers (
6
4. Heat shields ( ).
5. Exhaust manifold (1). Use care not to damage the
AIR system injection tubes (if used).
COOLANT PUMP REMOVAL
Remove or Disconnect (Figures 14 and 15)
1. Bolts (12).
2
. Coolant pump (10).
11
3. Gaskets ( ).
INTAKE MANIFOLD REMOVAL
Remove or Disconnect (Figures 16 and 17)
1. Bolts (19) and studs (20).
2. Intake manifold (21).
• Pull the intake manifold up.
N O T IC E : D o n o t a t t e m p t to lo o s e n th e m a n i­
f o ld b y p r y in g u n d e r th e g a s k e t s u r f a c e w ith
a n y to o l.
22
3. Gaskets ( ).
4. Seals (23) (7.4L engines).
ROCKER ARM COVER REMOVAL
Remove or Disconnect (Figures 18 and 19)
1. Bolts (30 or 36).
2. Rocker arm covers (32). If the rocker arm cover
sticks to the cylinder head, try bumping the end of
the cover with a rubber mallet. If the cover will not
come loose, carefully pry until loose. DO NOT DIS­
TORT THE SEALING FLANGE.
3. Gaskets (34).
VALVE TRAIN COMPONENT
REMOVAL
+ + Remove or Disconnect (Figures 20 through
26)
Tools Required:
J 3049-A Valve Lifter Remover (Plier Type)
J 9290-01 Valve Lifter Remover (Slide Hammer
Type)
1. Nuts (40) (5.0L and 5.7L engines) or bolts (40)
(7.4L engines), balls (41), rocker arms (42), and
pushrods (43 or 210).
• On 7.4L engines, the exhaust valve pushrods
are longer than the intake valve pushrods.
• Every effort should be made to ensure that
these mating parts are installed in their original
locations during assembly. A simple valve train
component organizer rack can be made from a
piece of wood, as shown in figure 24.
2. Hydraulic lifters (44 or 209).
2
).
• Remove the lifters one at a time using a mag­
net. Place the lifters in the organizer rack, or
tag them in some way to ensure they can be
returned to the valve lifter bore from which they
were removed.
• Some lifters may be stuck in their bores due to
gum or varnish deposits. These lifters can be
removed using either J 3049-A (figure 25) or
J 9290-01 (figure 26).
CYLINDER HEAD REMOVAL
++
Remove or Disconnect (Figures 20 through
23)
1. Bolts (45 or 51).
2. Cylinder heads (46). Use care when handling the
cylinder heads, to prevent damage to the gasket
sealing surfaces.
3. Gaskets (47).
10. Coolant Pump
1 1
. Gasket
12. Bolt
13. Plug
F9349