Vortech 1996-2000 5.7L Vortec Truck/SUV User Manual

Page 16

P/N: 4GM020-010
©2000 Vortech Engineering, Inc.
All Rights Reserved, Intl. Copr. Secured
14AUG00 V 1.2

(Vortec 350-2 )4GM

HEATER HOSE EXTENSION

A. Attach the supplied 5/8” x 24” pre-bent 90

hose

to the top water pump fitting (points straight up)
and secure using the factory clamp.

B. Route the new hose over to the existing factory

heater hose modified in step 1. (See

Fig. 9-a

.) Join

the two hoses together using the supplied 5/8”
coupling and #8 hose clamps.

C. Refill the cooling system with the previously drained

coolant.

10. FUEL MANAGEMENT UNIT

A. Position the fuel management unit (FMU) on the

inside of the vehicle frame, underneath the driver
seat. (

See Figs. 10-a, 10-b.)

Mark and drill two #16

holes. Secure the FMU using the supplied #12 hex
head screws.

B. Separate the factory 5/16” fuel rail return line at the

compression fitting junction underneath the ve-
hicle near the fuel filter. Attach the supplied -4 flare
fitting adapters to each end of the open return line
(one fitting will point toward the rear, and one
toward the front). Connect one end of the supplied
22” FMU hose to the return line running back to the
tank, and the other end to the straight fitting on the
center of the FMU. Connect one end of the remain-
ing 36” FMU hose to the return line coming from
the fuel rail, and the other end to the 90

fitting on

the side of the FMU (see

Fig. 10-c

C. Secure the lines away from abrasion using the

supplied tie wraps.

D. Tap into the supercharger bypass valve vacuum

hose using the supplied 65” long length of hose
and 5/32” brass TEE. Route the hose in a manner
that will keep it away from exhaust heat and will
allow gentle bends without pinching. Attach the
hose end to the lid of the FMU.

5/16” LINE
FROM RAIL

VACUUM LINE
TO MANIFOLD

5/16” LINE
TO TANK

FMU OUTLET
(TO TANK)

FMU INLET
(FROM FUEL
RAIL RETURN)

MOUNT TO FRAME

INSTALL NEW HOSE

FUEL PUMP

HARNESS

FMU

Fig. 10-a

Fig. 10-b

Fig. 10-c

Fig. 9-a