Vortech 1992-1996 5.7L LT1 Corvette - Manual (Page 14)

5. OIL DRAIN FITTING, cont'd.
C. Use a small center punch to perforate the pan
and expand hole. Switch to a larger diameter
punch and expand the hole further to approxi-
mately 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.
D. Tap the hole with a 3/8" NPT tap approximately
1/4" deep. Pack the flutes of the tap with heavy
grease to hold chips. Use a small magnet to
check for any stray chips.
E. Thoroughly clean the threaded area. Apply a
small amount of silicone sealer to the new
threads. Apply more sealer to the 3/8" NPT
street elbow and secure in hole (elbow must
point toward the front of the vehicle). Make sure
a seal is formed all around the fitting. Thread the
3/8" NPT x 1/2" barb fitting into the fitting
installed in the pan using pipe sealer.
F. Change the engine oil and filter.
4
CAUTION: Use care so as not to strike
internal engine components when punch-
ing oil pan.
NOTE: This method of rolling over the lip
of the hole and tapping it works very well
if carefully done and should cause no
problems.
CONNECT TO MANIFOLD
VACUUM/PRESSURE
INLET (FUEL LINE
FROM STOCK
REGULATOR)
OUTLET (FUEL
FROM HERE
RETURNS TO TANK)
FMU BRACKET
6. FUEL MANAGEMENT UNIT INSTALLATION
A. Attach the Fuel Management Unit (FMU) to the
FMU bracket with the flare fittings pointing
down and toward the front of the vehicle as shown
in the graphic.
B. Install the FMU and bracket assembly in the space
between the heater blower and coolant surge
tank. Sandwich one end of the bracket between
the blower motor and the relay bracket. Use the #8
washer as a spacer in the rear relay hole. Secure
the inboard end at the surge tank bracket. Use the
original bolts. (Refer to the photos on next page.)