Chevrolet CHEVY VAN G10 SERIES Service Manual page 257

FUEL TANK AND EXHAUST
Fuel T anks and A ttachm ents .................................................
Fuel Lines ...................................................................................
Evaporation C ontrol System (ECS) C o m p o n e n ts ............
G eneral D e s c rip tio n ..................................................................
C om ponent Part R eplacem ent ..............................................
D raining Fuel T a n k .................................. ..........................
All fuel tanks are equipped w ith a pressure-vacuum filler
neck cap.
The fuel pickup pipe is built integrally w ith the tank gauge
u n it, located a t the top o f the tank. A large area, fine-mesh
screen is located on the b o tto m o f the fuel pickup pipe. This
screen is designed to prevent the entrance o f dirt or w ater into
the fuel feed system , and operates w ith a self-cleaning action.
Draining Fuel Tank
If the fuel tank does n o t incorporate a drain plug, it will be
necessary to siphon fuel from th e tank when draining is
needed. The following procedure is recom m ended.
1. O btain approxim ately 10 feet o f 3 /8 " I.D. hose and cut a
flap-type slit 18" from one end. Make this cut in the
direction o f the shorter end o f hose (See Figure 1).
2. Insert a small pipe nipple (slightly larger O.D. than the
hose I.D.) into the opposite end o f hose.
3. Insert the nipple end o f siphon hose into the fuel tank
filler neck w ith the natural curl o f the hose pointed
down. Insert until the hose is heard to strike the b o tto m
o f the tank.
4. With the opposite end o f the hose in a suitable container,
insert the air hose in the dow nw ard direction in the
flap-type slit and trigger the flow of fuel.
CONTENTS OF THIS SECTION
FUEL TAN KS AND ATTACHMENTS
Fuel Cap, Fuel Lines & Fuel T an k—
lines should be inspected for road damage w hich could cause
leakage. Inspect fuel cap for correct sealing ability and
indications o f physical damage. Replace any damaged or
m alfunctioning parts.
GENERAL DESCRIPTION
COMPONENT PART REPLACEMENT
SECTION 8
P ag e
8-1 Exhaust System s ........................................................................ 8-7
8-3 Special T ools ............................................................................... 8 -1 0
8-4
INDEX
P ag e
8-1 Fuel T a n k s ..............................................................................
8-1 M etering U nits (Gauge Sending U nit) ...........................
8-1 Cleaning F u e l'S y s te m s ........................................................
The fuel tank, cap and
Fram e m ounted tanks consist o f an u pper and lower half,
each w ith a wide flange. The tw o tank sections are seam
welded at the flange around the entire tank to assure leakproof
c o n s tr u c tio n . E xceptional
com bination o f the w elded flanges and depressed ribs in both
upper and lower tank sections.
stiffness is secured
— FUEL FLOW
Fig. 1- S ip h o n C o n s tru c tio n
C H E V Y V A N SH O P M A N U A L
P age
P age
8-2
8-2
8-3
by the