Vortech 1996-2000 4.3L Truck/SUV User Manual

Page 7

P/N: 4GD020-010

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.

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.