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LEAK TEST AND ENGINE MEASUREMENT
LEAK TEST
The following gives verification procedures for
593 HO engines.
PREPARATION
1. Remove tuned pipe.
2. Install plug over exhaust manifold.
3. Remove carburetors.
4.Unplug fuel inlet line from fuel rail
5. Insert plugs in intake rubber boots. Tighten with
existing clamps.
6. Using a hose pincher (P/N 295 000 076), block impulse
hose.
7. Install air pump on exhaust plug.
NOTICE:
If necessary, lubricate air pump piston with mild soap.
Using hydrocarbon lubricant (such as engine oil) will
damage rubber seal of pump piston.
8. Activate pump and pressurize engine to 34 kPa
(5 PSI). Do not exceed this pressure.
9. Engine must stand this pressure during 3 minutes.
– If pressure drops before 3 minutes, check tester kit by spraying
a soapy solution on pump cylinder, all plugs and fittings.
– If tester kit is leaking, bubbles will indicate where leak comes
from.
– If tester kit is not leaking, check engine as per the following
procedure.
PROCEDURE
NOTICE:
A flow chart has been prepared as a visual reference. Page 7-25
and 7-26 of this chapter.
Using the flow chart and the following text, pressurize area to be
tested and spray soapy solution at the indicated location.
– If there is a leak at the tested location, it is recommended to
continue testing the next item before overhauling the engine.
There is a possibility of more than one leak.
CAUTION
ENGINE (CYLINDERS / HEAD / BASE / EXHAUST) 7 - 23
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