Chevrolet CHEVY VAN G10 SERIES Service Manual page 166

Fig. 2 3 V —Measuring Camshaft Lobe Lift
until th e lifter is on th e heel o f the cam lobe. At this
point, the push rod will be in its low est position.
4. Set dial indicator on zero, th en ro tate the crankshaft
slowly, or attac h an auxiliary starter sw itch and "b u m p "
the engine over, until the push ro d is in fully raised
position.
C A U T IO N : The distributor prim ary lead must be
disconnected fro m the negative post on the coil.
5. Com pare the to ta l lift recorded from the dial indicator
w ith specifications.
6
. C ontinue to ro tate th e engine until the indicator reads
zero. This will be a check on th e accuracy o f th e original
indicator reading.
Fig. 2 4 V —Rem oving Camshaft
7. If cam shaft readings for all lobes are w ithin specifi­
cations, remove dial indicator assembly.
8
. Install an d adjust valve m echanism as outlined.
Removal
1. Remove valve lifters as outlined.
2. Remove crankcase fro n t cover as outlined.
3. Remove grille as outlined in Section 13.
4. Remove fuel p u m p push rod as outlined in Section
5. Com plete cam shaft removal as follows:
N O T E : Sprocket is a light f it on camshaft. If
sprocket does not come o ff easily a light blow on
the lower edge of the sprocket (w ith a plastic
mallet) should dislodge the sprocket.
6
. Install tw o 5 /1 6 " x 18 x 4 " bolts in cam shaft bolt holes
th en remove cam shaft (Fig. 24V ).
C A U T IO N : A ll camshaft journals are the same
diameter and care must be used in removing cam­
shaft to avoid damage to bearings.
Installation
N O T E : Whenever a new camshaft is installed coat
camshaft lobes with " M o ly k o te " or its equivalent.
1. L ubricate cam shaft journals w ith engine oil and install
cam shaft.
2. Install tim ing chain on cam shaft sprocket. Hold the
sprocket vertical w ith th e chain hanging dow n, and align
marks on cam shaft an d crankshaft sprockets. (R efer to
Fig. 19V and 22V ).
3. Align dowel in cam shaft w ith dowel in hole in cam shaft
sprocket then install sprocket on camshaft.
4. Draw th e cam shaft sprocket o n to cam shaft using the
m ounting bolts. T orque to specifications.
5. L ubricate tim ing chain w ith engine oil.
6
. Install fuel pum p push ro d as outlined in Section
7. Install grille as o utlin ed in Section 13.
8
. Install crankcase fro n t cover as outlined.
9. Install valve lifters as outlined.
Flywheel
Removal
With transm ission an d /o r
rem oved from engine, remove the flywheel.
Installation
1. Clean th e m ating surfaces o f flyw heel and crankshaft to
make certain th ere are no burrs.
2. Install flywheel on crankshaft and position to align dowel
hole o f crankshaft flange and flyw heel (Fig. 25 V).
N O T E : On A u to m atic
engines, the flyw heel must be installed w ith the
flange collar to transmission side (Fig. 2 5 V ).
ENG INE 6-37
6
M.
6
M.
clutch housing and clutch
Transmission equipped
C H E V Y V A N SH O P M A N U A L