Chevrolet BEAUVILLE SPORTVAN G10 SERIES, Руководство по обслуживанию

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ENG IN E C O O LING 6K-3
3. A dd th e liquid p o rtio n (N o. 1) o f th e cooling system
cleaner.
4. Fill th e cooling system w ith w ater to a level o f a b o u t 3
inches below th e to p o f the overflow pipe.
5. Cover the rad iato r and ru n th e engine at m o derate speed
until engine coolant te m p eratu re reaches 180 degrees.
6
. Remove cover from rad iato r and continue to ru n the
engine for 20 m inutes. Avoid boiling.
7. While th e engine is still running, add th e pow der p o rtio n
(No. 2) o f the cooling system cleaner and co n tin u e to run
th e engine for
10
m inutes.
W A R N IN G : Be careful not to scald yo u r hands.
8
. A t th e end o f this tim e, sto p th e engine, w ait a few
m inutes and th e n o p en th e drain. Also, rem ove low er
hose connection.
N O T E : D irt and bugs may be cleaned o u t o f the
radiator air passages by blowing o ut w ith air
pressure fro m the back o f th e core. Do n ot bend
radiator fins.
Reverse Flushing
Reverse flushing should alw ays be accom plished a fte r the
system is th o ro u g h ly cleaned as o u tlin ed above. Flushing is
accom plished th ro u g h th e system in a directio n opposite to
th e norm al flow . This ac tio n causes th e w ater to get behind
th e corrosion deposits and force th e m o ut.
Radiator
1. Rem ove th e rad ia to r u p p er an d low er hoses and replace
th e rad iato r cap.
2. A tta ch a lead-away hose at th e to p o f th e rad iato r.
3. A tta c h a n ew piece o f hose to th e rad iato r o u tle t
c o n n ectio n an d insert th e flushing gun in this hose.
4. C onnect th e w ater hose o f th e flushing gun to a w ater
o u tle t an d th e air hose to an air line.
5. T urn o n the w ater an d w hen th e radiator is full, tu rn on
th e air in sh o rt b lasts, allow ing th e rad iato r to fill
betw een blasts o f air.
C A U T IO N : A p p ly air gradually as a clogged
radiator will stand o nly a lim ited pressure.
6
. C ontinue this flushing u n til th e w ater from th e lead-away
hose runs clear.
Cylinder Block and Cylinder Head
1. With th e th e rm o stat rem oved, a tta c h a lead-away hose to
th e w ater pum p inlet an d a length o f new hose to the
w ater o u tle t co n n e ctio n a t th e to p o f th e engine.
N O T E : Disconnect th e heater hose and cap
connections at engine when reverse flushing engine.
2. In sert th e flushing gun in th e new hose.
3. T urn o n th e w ater an d w hen th e engine w ater ja ck e t is
full, tu rn on th e air in sh o rt blasts.
Fig. 4 —Pressure Checking R adiator Cap
4. C ontinue this flushing u n til th e w ater from th e lead-away
hose runs clear.
Heater Core
1. Rem ove w ater o u tle t hose fro m h ea te r core pipe.
2. Rem ove inlet hose fro m engine connection.
3. Insert flushing gun an d flush h ea te r core. Care m ust be
tak en w hen applying air pressure to prevent damage to
th e core.
Fan Belt Adjustment
1. Loosen b olts at D elcotron m ounting.
2. Pull D elcotron aw ay from engine u n til desired tension
reading is o b tain ed w ith a strand tension gauge. Refer to
“ Engine T une Up S pecifications.”
3. T ighten all D elco tro n b olts securely.
Radiator Cap
The rad ia to r cap should be washed w ith clean w ater and
pressure checked a t regular tune-up intervals. Inspect rubber
seal on cap for tears or cracks. Install rad ia to r cap on tester
(Fig. 4). If th e pressure cap will n o t hold pressure or does not
release a t th e p ro p er pressure, replace th e cap.
Thermostat
The th e rm o stat consists o f a restric tio n valve ac tu a ted b y a
th erm o static elem ent. This is m o u n te d in th e housing at the
cylinder head w ater o u tle t above th e w ater pum p. T herm ostats
are designed to o pen an d close a t p redeterm ined tem peratures
and if n o t o perating properly should be rem oved and tested as
follows:
Replacement
1. Rem ove rad ia to r to w ater o u tle t hose.
2. Rem ove th e rm o stat housing bolts and rem ove w ater
o u tle t and gasket from th e rm o stat housing (Fig. 5).
3. Inspect th e rm o sta t valve to make sure it is in good
condition.
4. Place th e rm o sta t in a 33% glycol solution 25° above the
tem p eratu re stam ped on th e th e rm o stat valve.
C H E V Y V A N S H O P M A N U A L