Vortech Universal Big Block Carbureted System User Manual
Page 12
P/N: 4GA020-030
©2008 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
08DEC08 V3.0(BBC LowMount(4GA..030 V3.0))
4
4. SUPERCHARGER OIl DRAIN
A. With this option, it is nec-
essary to make a hole in
the oil pan. (See Fig.
4-a.) It is best to punch the
hole rather than drill.
Remove paint from around
the hole area so that it
does not flake into the pan.
B. Make a mark on the oil
pan on the left side ahead
of the oil filter. The mark
should be 1" below the bolt
flange and forward of the
third bolt by 1". You may
choose a different place, if
necessary. However, take
care not to damage any
internal parts. The drain hose should gradual-
ly drop with no dips or kinks and should be
above the oil level.
C. Use a small center punch to perforate the
pan and expand the hole. Switch to a larger
diameter punch and expand the hole further
to approximately Ø9/16" (or use an air ham-
mer with a 9/16" round punch attachment).
Most punches are made from hexagon mate-
rial and may be placed in a socket with an
extension to make this procedure easier.
D. Tap the hole with a 3/8"NPT tap approximate-
ly 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 pro-
cedure.
E.
Thoroughly clean the threaded area with ace-
tone or other solvent. Apply a small amount
of silicone sealer to the new threads. Apply a
small amount of silicone sealer to the threads
of the 3/8"NPT hose fitting and secure in the
hole. Make sure a seal is formed all around
the fitting. Allow the sealer to cure completely.
F.
Temporarily cover the end of the hose and
secure out of the way. The return is a gravity
drain and should be routed to provide a grad-
ual drop.
G. Drain and replace the engine oil and change
the filter.
1”
1”
PUNCH HOLE
THROUGH
Fig. 4-a