Vortech 1997-2004 C5 Corvette User Manual
Page 15
P/N: 4GR020-010 v1.7, 2009-11-25
©2009 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
3
Fig. 2-c
A. To provide an oil drain for the supercharger, it
is necessary to make a hole in the front of
the oil pan. Locate and center punch the hole
per Fig. 3-c. This hole should be centered
.40" from bottom of oil pan lip between the
last bolt and the driver’s side of the oil pan.
Drill as far over to the driver’s side as
possible to avoid contacting internal
engine components!
B. Drill 1/8" pilot hole at the marked location by
positioning the drill as shown in Fig. 3-a.
C. Use the supplied 9/16" roto broach to drill
hole in oil pan. Break through pan carefully
so that cut out piece does not go into the oil
pan.
D. Tap the hole with a 3/8" NPT to approximately
1/2" deep or until fitting can be started. Pack
the flutes of the tap with heavy grease to hold
any loose chips.
E.
Thoroughly clean the threaded area. Reach
inside oil pan and retrieve any stray chips.
3. OIL DRAIN LINE INSTALLATION
Fig. 3-a
dRiLL MOTOR
L.
Remove the socket-head cap screw and drill
guide.
M. Install the supplied Ø1/4" x 1/2" long dowel
pin into the drilled hole with the rounded end
pointed toward the front of the vehicle.
N. Verify that the dowel pin is recessed slightly
from the damper face.
O. Install the supplied new damper retaining
screw as follows:
1. Lightly coat the threads of the new
retaining screw with red threadlocker.
Install and torque to 37 ft-lbs.
2. Using a 1/2" breaker bar, tighten the
retaining screw an additional 120° or
tighten with a torque wrench to 250 ft-
lbs.
P.
Remove the flywheel tool, re-install the starter
and re-connect the wiring.
2. HARMONIC DAMPER DOWEL PIN INSTALLATION, cont’d.
NOTE: If it is necesary to rotate the engine to install the
remaining dowel pins, tap the installed dowel pin
flush with the surface, remove the socket head screw,
remove the flywheel holding tool (if installed), install
the old damper retaining screw and rotate the damper
to the desired position.
NOTE: Lowering of the sway bar will aid in oil drain installa-
tion access.