Service Cooling System; Check And Adjust Accelerator Linkage; Service Crankcase Ventilation - Chevrolet CHEVY VAN G10 SERIES Service Manual

ENG INE 6-6
Fig. 1 0 —M a n ifo ld H eat C o n tro l V alve (T y p ic a l V 8 )
N O T E : If a com plaint of poor high speed perform ­
ance exists on the vehicle, fuel pump tests described
in Section 6M should be performed.

SERVICE COOLING SYSTEM

l . Inspect cooling system for leaks, w eak hoses, loose hose
clamps and correct coolant level, and service as required.
N O T E : A cooling system
scribed in "A d d itio n a l Checks and Adjustm ents" in
this section, may be perform ed to detect internal or
external leaks w ithin the cooling system.

CHECK AND ADJUST ACCELERATOR LINKAGE

1. D isconnect accelerator rod at carburetor th ro ttle lever.
2. H old carb ureto r th ro ttle lever in wide open position.
3. Pull accelerator rod to wide open position. (O n vehicles
equipped w ith Powerglide, pull through detent.)
4. A djust accelerator rod to freely enter hold in carburetor
th ro ttle lever.
N O T E : Accelerator linkage is outlined in detail in
Section 6M .
5. C onnect accelerator ro d at th ro ttle lever.
SERVICE CRANKCASE V E N T IL A T IO N
(FIGS. 11 and 12)
All engines have a " Closed Positive" ventilation system
utilizing m anifold vacuum to draw fumes and contam inating
vapors in to the com bustion cham ber where they are burned.
Since it affects every part o f the engine, crankcase ventilation
is an im p o rtn at function and should be understood and
serviced properly.
pressure test, as de­
Fig. 11—Crankcase V e n tila tio n Systems (In Line)
In a "Closed Positive" ventilation system , air is drawn
through the engine, (th ro u g h a regulating valve Fig. 13) into
the m anifold, drawing crankcase vapors and fumes w ith it to
Fig. 1 2 —Crankcase V entilation System (V 8)
C H E V Y V A N S H O P M A N U A L