Vortech Engineering GM 7.4 Instruction Manual download pdf (Page 12)

P/N: 4GC020-010

15SEP01 V1.1

(88-95 GM Lt Trk(4GC))

7/8" TO REAR

OF BOLT

OIL PAN

OIL FILTER

PUNCH HOLE THROUGH

DOWN 3"

3. OIL DRAIN LINE

A. Raise the front of the vehicle and support with

appropriate jack stands.

B. To provide an oil drain for the supercharger, it is

necessary to make a hole in the oil pan. It is best

to punch the hole rather than drill. Remove 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 should be 3"

below the bolt flange and rearward of the fourth

bolt 7/8". (See

Fig. 3-a

.) You may choose a

different place, if necessary; however, take care

not to damage any internal parts. The drain

hose should gradually drop with no dips or kinks

and should be above the oil level.

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 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.

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 ac-

etone 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 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 oil cooler line with the tie

wraps provided. Temporarily cover end of hose

and secure out of the way. The return is a gravity

drain and should be routed to provide a gradual

drop.

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

CAREFULLY done and should cause

no problems.

Fig. 3-a

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 23 24

Comments to this Manuals

No comments

Vortech Engineering GM 7.4 Instruction Manual Page 12

Comments to this Manuals

Related products and manuals for Cars Vortech Engineering GM 7.4