Chevrolet Corvette 1953 User Manual

Fit. 62-UPfKr J~rtilifl'lf ShUld Rontwetl
6. Compression on all cylinders should be 130 pounds or
better. All cylinders should read alike within 5 to 10
pounds for satisfactory engine performance.
Should a low compression reading be obtained on two
adjacent cylinders, it indicates the possibility of a leak from
one cylinder to the other, usually caused by a Jeak at the
cylinder head gasket.
If tbe compression readings are low, or vary widely, the
cause of the trouble may be determined by injecting a
liberal supply of engine oil
on top of the pistons of the low
readiog cylinders.
Crank the engine over several times, and then take a
second compression
lCSt. If there is practically no difference
in the readings when compared with the first
Aest, it indi·
40
cates sticky or poorly seating valves. However, if the
pression on the low reading cylinders is higher and a
uniform with the other cylinders it indicates compf'ClSi
loss past the pistons and rings.
The cause of low or uneven compression must be correc~
before proceeding with an engine tune-up job.
SPARK PLUGS
To gain access to the spark plugs, the upper ignition shid
(fig. 61) must be removed. It is important that this shiel
be replaced when servicing is complete.
Clean the spark plugs thoroughly using an abrasive t
cleaner.
If the porcelains are hadly glazed or blistered, th
F't. 63-SeU;ng Spark Plug Gop
spark pi ugs should
replaced. AU spark plu~
must be of the same roak
and number or heat rang
Adjust the spark plug ga
to .035' using a round
feeler gauge (fig. 63).
CAUTION : In adjwtin
the
spark plug gap,
never bend the center.
electrode which ex
tends through the
porcelain center.

Chevrolet Corvette 1953 Specifications

General

Brand	Chevrolet
Model	Corvette 1953
Category	Automobile
Language	English