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CYLINDER HEAD VOLUME MEASUREMENT
The measuring fluid will be a
solution of 50% diesel and 50% auto transmission fluid. To be measured by
use of 'B' Grade Burette maximum capacity 50cc (recommended 25cc), calibrated to
a minimum 1/10th of a cc, under gravity feed.
METHOD
(1) Remove
spark plug and insert A.I.D.K.A CC Test Plug.
(2) Place
piston at approximately TDC.
(3) The CC
Test Plug to be withdrawn two (2) turns
(4) Insert the
required volume of measuring fluid. Make sure the fluid is visible in the
CC
test plug.
(5) Tighten CC
test plug down until it stops.
(6) Slowly
wind motor over and check for fluid level in CC test plug
(as shown in diagram).
(NOTE: Motor to be measured should be allowed to cool to ambient
temperature
and no fluid shall be expelled through the top of CC test plug)..
(7) Should the first test fail, the competitor may request a second
test. This test
to repeat Items 1 to 6 above (after step 8).
(8) To clean out measuring fluid after failure of first test and
before commencement
of second test, unleaded petrol to be poured into cylinder, motor to be rinsed
and
blown out by inserting air hose into spark plug recess and turning piston to
open
exhaust, therefore, expelling excess fluid.
CYLINDER HEAD IS NOT TO BE REMOVED.
(9) This applies to all 20mm plug length engines.
NOTE: The CC Test Plug is available from your A.I.D.K.A National Technical
Officer.
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