Vortech 1964-1967 Pontiac GTO Carbureted - Manual (Page 11)

3
3. OIL DRAIN INSTALLTION
Fig. 3-a
A. To provide an oil drain for the supercharger,
it is necessary to make a hole in the oil pan.
Locate and mark the hole location. (See
Fig. 3-a, 3-b or 3-c, depending on which
side of the engine the supercharger will be
mounted on.
B. Remove any paint from around the hole
area.
C. Use a small center punch to perforate the
pan and expand the hole. Switch to a
larger diameter punch and expand the hole
to about 9/16”. Most punches are made
from hexagonal material and may be placed
in a socket with an extension to make this
procedure easier.. Use caution so that the
hole is no enlarged too much and that the
punch does not contact the engine
internals.
D. Tap the hole with a 3/8” NPT tap
approximately ¼” deep. Pack the flutes of
the tap with heavy grease to hold the chips.
Use a small magnet to check for any stray
chips.
E. Thoroughly clean the threaded area. Apply
a small amount of silicone sealant to the
new threads. Apply more sealant to the
supplied 3/8”NPT x ½” barb and secure in
the previously threaded hole. Make sure a
seal is formed all around the fitting.
F. Drain the engine oil, install a new filter and
refill with fresh oil.
NOTE: This method of rolling over
the lip of the hole and tapping
works very well if carefully
done and should cause no
problems.
NOTE: Removal of the oil pan may
ease oil drain fitting installation
on some applications.
Fig. 3-b
Fig. 3-c
OIL PAN RAIL
TAP HOLE, 3/8 NPT
2.0
1.0
Pontiac GTO
(Driver side oil drain)
OIL PAN RAIL
TAP HOLE, 3/8 NPT
2.0
1.0
Pontiac GTO
(Passenger side oil drain)