Toyota 2H Repair Manual page 45

E N G I N E M E C H A N I C A L
COM PRESS I O N C H E C K [2 H ]
N O T E :
t i o n or poor f uel economy. measure the cylinder compres­
sion pressure.
1. W A R M UP AND STOP E N G I N E
2 . R E M O V E G L O W P L U G S ( S e e p a g e E M -49)
CAUTION :
3.
C H E C K C Y L I N D E R C O M P R E S S I O N P R E S S U R E
( a )
S S T
( b l
(e)
S S T
Id)
N O T E :
e n g i n e revo l u t i o n s of m o re than
( e )
Compression pressur e :
M i nimum pressu r e :
Difference between each c y l i n d e r :
(f)
4. I N S T A L L GLOW P L U G S
( S e e steps 1 to 4 on p
-
Com pression Check
I f there i s lack o f power, excessive o i l consump­
Make sure the load wire is not grounded,
I n s t a l l S S T (gauge adapter) t o the g l o w plug hole.
0 9 9 9 2 - 0 0 0 2 3
Connect S S T (compression gauge) to S S T (gauge
a d a p t e d .
0 9 9 9 2 - 0 0 0 2 3
Fully o pen t h e th rottle valve.
While crank.ing t h e engine with the sta rter, measure
the c o m press ion pressure.
Alway s use a fully charged battery to o b t a i n
R e p e a l sleps ( a ) t h r o u g h (d) for e a c h cylinder.
2 8 . 0 kg/cm� ( 3 9 8 p s i . 2 . 7 4 6 k P a ) or more
20.0 kg/cm2 ( 2 8 4 p s i . 1 . 9 6 1 kPa)
. 2.0 k g / c m 1 (2.8 psi, 1 9 6 kPa) or l e s s
I f the cylinder com pression i n one or more cylinders
is low. pour a small amount of engine o i l into the
cylinder through t h e glow plug hole and repeat steps
(a) through (dl for the cyli nder with low c o m pressi on .
•
If adding oil helps the c o m pression. c h a nces are
t h a t the p iston ri n g s andlor cylinder bore are w o rn
or damaged .
•
If pressure stays low. a valve may be s l i cki ng or
seating i m properly. or there may be leakage pas!
the gasket
a
g e
[ 2 H l
E M - 3 6
2 5 0 r p m .
F U - 8 1