Chevrolet CHEVY VAN G10 SERIES Service Manual page 174

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Fig. 8 —Shim Fabrication Dimensions
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. Recheck to ta l indicator run-out to verify th a t run -o u t is
w ithin .006 inch. Install fan belt and adjust.
Water Pump
Removal
1. Drain radiator and break loose the fan pulley bolts.
2. D isconnect h eater hose, low er rad iator hose and by pass
hose (as required) at w ater pum p.
3. Loosen D elcotron an d remove fan belt th e n remove fan
b olts, fan and pulley.
C A U T IO N : If a fan blade is bent or damaged in
any w ay, no atte m p t should be made to repair and
reuse the damaged part. A bent or damaged fan
assembly should always be replaced w ith a new fan
assembly.
It is essential that fan
proper balance and
assured once a fan assembly has been bent or
damaged. A fan assembly that is not in proper
balance could fail and fly apart during subsequent
use creating an extrem ely dangerous condition.
N O T E : Therm ostatic fan clutches must be kept in
an "in-car" position. When removed fro m the car
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assemblies remain in
proper balance cannot be
„
TOTAL RUN-OUT + 2 = SHIM THICKNESS
TO OBTAIN ZERO ( - 0 - ) RUN-OUT
Fig. 9 —Determ ining Shim Placement
the assembly should be supported so th at the clutch
disc remains in a vertical plane to prevent silicone
fluid leakage.
4. Remove p um p to cylinder block bolts and remove pum p
and old gasket from engine.
N O T E : On in line engines, pull the pum p straight
out of the block first, to avoid damage to impeller.
Installation
1. Install pum p assem bly on cylinder block th en , using a
new sealer coated pum p-to-block gasket tighten bolts
securely.
2. Install pum p pulley and fan on pum p hub and tighten
bolts securely.
N O T E : A guide stud (5 /1 6 " -2 4 x 1" bolt w ith the
head removed) installed in one hole of the fan will
aid in aligning hub, pulley and fan. Remove stud
after starting the remaining three bolts.
3. C onnect hoses and fill cooling system .
4. Install fan b elt and adjust as previously outlined.
5. S tart engine and check for leaks.
ENG INE C O OLING 6K-5
.010 SHIM = - 0 - R U N OUT
C H E V Y V A N S H O P M A N U A L