Section 03 787 RFI ENGINE
Subsection 01 (LEAK TEST)
LEAK TEST
SERVICE TOOLS
Description Part Number Page
engine leak test kit ...............................................................
295 500 352 ..................................... 59–60
small hose pincher................................................................
295 000 076 ..................................... 60–61
supplementary engine leak test kit.......................................
295 500 780 ..................................... 59–60
GENERAL
An engine leak test kit (P/N 295 500 352) and a
supplementary engine leak test kit (P/N 295 500
780) are available to help diagnose engine prob-
lems such as engine seizure, poor performance,
oil leakage, etc.
295 500 352
ENGINE LEAK TEST KIT
295500780
SUPPLEMENTARY ENGINE LEAK TEST KIT
Before disassembling any components of the en-
gine, it is important to perform a leakage test to
determine which part is defective.
It is also very important after servicing the engine,
even for a complete engine rebuilt, to perform an-
other leakage test; at this stage, it may avoid fur-
ther engine problems and minimizing the risk of
having to remove and reinstall the engine again.
Static bench testing is the most effective way to
conduct a leakage test. Inboard testing does not
allow complete access to, and observation of all
engine surfaces and should be avoided whenever
possible.
When installing hoses of the engine leak test kit or
supplementary engine leak test kit, use the collars
provided in the kit to ensure a proper sealing.
When pressurizing the engine, first confirm that
the components of the engine leak test kit or sup-
plementary engine leak test kit are not leaking by
spraying a solution of soapy water on all hoses,
connections, fittings, plates, etc. If there is a leak,
bubbles will indicate leak location.
Three areas of the engine will be tested in se-
quence as per the diagnostic flow chart (see the
end of this subsection).
1. Engine Cooling System.
2. Bottom End and Top End.
3. Rotary Valve Shaft.
NOTE: If a leak is found, it is important to continue
testing as there is the possibility of having more
than one leak. Continue pumping to compensate
fortheairlosttofindanotherleak.
TESTING PROCEDURE
Using the appropriate VEHICLE SHOP MANUAL,
remove the engine from the vehicle and place it
on a bench.
smr2005-080 59
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