C O Mpr E Ssi O N Ch E C K - Suzuki LT-4WD 1990 Service Manual

3- 1 E N G I N E
CO M P R E S S I ON CH ECK
C O M PRESSION TEST PROCEDURE
N OT E :
*
Before test i n g t h e engine for c omp ress i o n
p ressu re, make s u re that t h e cy l i nd e r h ead
n uts are tightened to specified torq u e
val u es a n d valves a r e p ro perly adj u sted .
*
Have the e n g i n e warmed u p by i d l i n g
befo re test i n g i t .
•
Remove the spark p l ug.
•
F it the comp ress i o n gau ge set CD and ® to the
p l u g h o le, tak i n g care to m a ke the con n ectio n
absolutely tigh t.
•
Tu rn the th rottl e l ever i n to w ide-open positi o n .
•
Cra n k the eng ine for a few seco nds w it h sta rter,
and read the h ig h est gauge i n d icat i o n as the
compression of the cy l i nder.
099 1 5-645 1 0
CD
®
099 1 5-632 1 0
Compression p ressu re
Standard
( )
1 000 - 1 400 k P a
1 0 - 1 4 kg/cm 2
1 42 - 1 99 psi
A low compression p ressu re may ind icate any of
the fo l l owi ng ma lfu ncti o n s :
Excessively wo rn cy l i nder wa l l
*
Worn p iston o r p isto n r i n gs
*
Piston ri ngs stuck i n the grooves
*
Poor seating contact of valves
*
Defective cy l i nder h ead gasket
*
When the com p ress i o n p ressu re noted is down to
or below the l i m it i n d icated above, the e n g i n e m u st
be d isassem b led , i n spected and repai red as re­
qu ired , w ith th ese five m a l cond itions in m i n d .
Co m p ression gau ge
Ada pto r
L i m i t
( )
800 k P a
8 kg/cm2
1 1 4 psi