Vortech 1996-2000 4.3L Truck/SUV - Manual (Page 7)

P/N: 4GD020-010
©2001 Vortech Engineering, LLC
All Rights Reserved. Intl. Copr. Secured
26APR01 V1.2 (4.3L V-6/S-10-(4GD))
2. OIL DRAIN
A. To provide an oil drain for the supercharger, it is
necessary to make a hole in the oil pan. Locate and
mark hole (see
Figs. 2-a, 2-b).
B. Remove the factory anti-roll bar brackets (2) from the
frame and allow the bar to temporarily drop down.
Unplug the factory crank trigger connector from the
sensor located in the timing cover.
C. Carefully drill a pilot hole (the same diameter as the
Rota Broach pilot) into the marked spot on the oil pan
(this procedure may also be done by removing the oil
pan if you are unsure of your ability to perform the
following steps properly). Drill slowly as to catch most
of the aluminum chips from the hole being drilled. Using
the 9/16" Roto Broach, very slowly machine a hole in
the pan (use the previously drilled hole as a guide). Stop
machining just before the tool breaks through into the
oil pan. Using a scribe or a small screwdriver, remove
the remaining disc-shaped oil pan piece (this allows
you to remove the pan slug before it falls into the oil
pan and keeps most of the aluminum chips out).
1. COMPONENT REMOVAL
A. Disconnect the negative battery cable from the battery.
B. Remove and set aside the following components:
- The entire air inlet/filter box assembly, including the
throttle body resonator and all hardware including
the throttle body mounting bolts.
- The crankcase vent tube from the passenger side
valve cover.
- The accessory drive belt.
- The tensioner and idler from the alternator mounting
bracket.
- The alternator and bracket.
- The 3/8" stud protruding from the right side cylinder
head.
(2000 California models only) Disconnect both ends of
the hose connecting to the factory check valve and
remove valve from the air injection tube. Remove the air
injection tube from the passenger's side exhaust
manifold. Remove the two studs using a 5.5mm socket.
C. Drain the contents from the radiator into a clean container.
D. Remove lower radiator hose.
1
PUNCH HOLE
THROUGH
(DIRECTLY
UNDERNEATH
CORNER PAN
BOLT)
HOLE MUST BE
MADE FROM THE
SIDE OF
THE PAN
OIL PAN BOLTS
FRONT VIEW
3/4”
BOTTOM VIEW
Fig. 2-b
Fig. 2-a
NOTE: Removal of the oil pan may ease oil drain fit-
ting installation on some applications.
NOTE: The factory transmission cooler lines may re-
quire bending to clear the supercharger oil
drain hose.