Engine Vacuum Check - Suzuki RA410 Manual

6A4-6 ENGINE MECHANICAL
(A)
(C)
(D)
(B)

ENGINE VACUUM CHECK

The engine vacuum that develops in the intake line is a good indi-
cator of the condition of the engine. The vacuum checking proce-
dure is as follows:
1) Warm up engine to normal operating temperature.
NOTE:
After warming up engine, place transmission gear shift le-
ver in "Neutral" (shift select lever to "P" range for A/T mod-
el), and set parking brake and block drive wheels.
2) With engine stopped, disconnect pressure regulator vacuum
hose from intake manifold and connect 3-way joint, hoses and
special tool (vacuum gauge and joint) between intake manifold
and vacuum hose disconnected.
Special Tool
(A): 09915-67310
(B): 09918-08210
SUZUKI GENUINE PARTS
(C): Hose 09343-03087
(D): 3-way joint 09367-04002
3) Run engine at specified idle speed, and read vacuum gauge.
Vacuum should be within following specification.
Vacuum specification (at sea level):
56.0 – 70.6 kPa (42 – 53 cmHg, 16.5 – 20.9 in.Hg) at specified
idling speed
4) After checking, connect vacuum hose to intake manifold.