Banks Power Twin-Turbo: Forced Induction- Twin Turbos Small Block Chevy - Manual (Page 17)

96800 v.1.0
17
1.
Oil drain threaded bungs must be
welded to the oil pan prior to installing
fittings. Two
1 ⁄ 2 ” NPT bungs are
provided for welding to a steel oil pan
(for an aluminum pan, installer must
provide aluminum weld bungs). Locate
the center of each bung 1
1 ⁄ 2 inches
below the pan rail flange adjacent to
the center main cap, check for pan
bolt clearance. This location prevents
return oil from being slung by the
counterweights or rod caps, and is
required for proper alignment with the
oil drain tubes. With the pan off the
engine, punch or drill a
5 ⁄ 8 -inch-
diameter hole through the pan wall at
each center mark. Center each bung
over the hole, check that the
chamfered thread side of the bung
faces out, then weld or braze the
bungs to the pan. See
Figure 16
2.
Install 1 ⁄
2
" NPT x 5 ⁄
8
hose 45º elbow
fitting into the oil pan with the end
pointing straight up. See Figure 17
3.
Apply anti-seize to the four 8mm x
1.25 x 20mm hex bolts.
4.
Install a pair of circle lock washers
over each 8mm bolt and insert the
bolts from below the oil drain tube
flanges. Place the gaskets over the
bolts and install onto the underside of
the turbocharger center sections. Only
tighten finger tight at this time. See
Figure 18
Note: Lock washers may be supplied
already cemented together. If not,
install two washers per bolt with the
course serrations facing each other.
5.
Measure and cut a piece of the 5 ⁄ 8 ”
rubber hose long enough to engage 1”
of the right drain tube when installed
on the hose fitting on the oil pan. The
elbow fitting in the pan may be rotated
slightly for best alignment.
Section 5
TURBOCHARGER OIL DRAIN LINE INSTALLATION
Figure 16