Vortech 1990-1995 5.7L TBI Truck/SUV - Manual (Page 10)

P/N: 4GB020-010
©2002 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
22FEB02 V1.1
(LT. TRUCK (4GB V1.1))
3. OIL DRAIN LINE
A. Raise the front of the vehicle
and support with appropri-
ate jack stands.
B. To provide an oil drain for
the supercharger, it is nec-
essary to make a hole in the
oil pan. It is best to punch
the hole rather than drill. Re-
move paint around the hole
area so that it does not flake
into the pan.
C. Make a mark on the oil pan
on the driver’s side ahead of
the oil filter. The mark must be 2" below the bolt
flange and forward of the fourth bolt (from rear)
1". If vehicle is equipped with an external oil
cooler, be sure that the drain line fitting clears the
oil cooler lines.
D. Use a small center punch to perforate the pan and
expand hole. Switch to a larger diameter punch
and expand the hole further to approximately
9/16" diameter. Most punches are made from
hexagon material and may be placed in a socket
with an extension to make this procedure easier.
E. Tap the hole with a 3/8" NPT tap approximately
1/4" deep. Pack the flutes of the tap with heavy
grease to catch and hold the chips. Once the tap
is removed, it must be cleaned and repacked
before tapping resumes. Use a small magnet to
check for any stray chips in the threads after
completing the tapping procedure.
F. Thoroughly clean the threaded area with acetone
or other solvent. Apply a small amount of silicone
sealer to both the new threads and to the threads
of the 3/8" NPT hose fitting and secure in hole.
Make sure a seal is formed all around the fitting.
Allow sealer to cure completely.
G. Route the line forward along the top rail of the oil
pan and secure to the pan bolts with the tie wraps
provided. Temporarily cover end of hose and
secure out of the way.
H. Drain and replace engine oil and change filter.
NOTE: This method of rolling over the lip of the
hole and tapping works well if CARE-
FULLY done and should cause no
problems.
2
Fig. 3-a
IN-LINE
FOURTH BOLT
OIL PAN
OIL FILTER
PUNCH HOLE THROUGH
DOWN 2"
1"