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486 PL ENGINE
P
After engine assembly total engine should be
tested for leakage as per the following procedure :
TEST PROCEDURE FOR SYSTEMCHECK AFTER
ENGINE ASSEMBLY
i.e. leakage test of Intake and exhaust system
(together)
1.
Plug / Close the end of exhaust tail pipe.
2.
Remove the flexible hose (ribbed hose),
connected from HFM (hot film mass flow
sensor) to assembly connection pipe before
throttle body.
3.
Make suitable arrangements for connecting
pressurised supply air at this point. Connect
air pressure indicator gauge (range 0.0 - 1.0
bar max.) in the circuit.
4.
Regulate the supply air pressure at 0.3 bar
using pressure regulator (if available source
air pressure is high).
5.
Ensure that supply air pressure is 0.3 bar before
connecting it to the engine.
6.
Start supply of pressurised air (0.3 bar) at the
point.
7.
Wait for 2 minutes to develop & stabilize air
pressure in the engine intake & exhaust
system.
8.
Close / Stop the air supply. The system is now
under pressure at 0.3 bar.
9.
If pressure does not drop below 0.2 bar, intake
& exhaust system is considered satisfactory.
Otherwise proceed as follows.
10. If system pressure drops below 0.2 bar, check
for leakages in the intake & exhaust system
(soap water solution may be used for the
purpose). Rectify the leakages & repeat the
procedure from step no. 4 for system re-check.
Note :
Engine after assembly should also be
checked using the above procedure. Plug /
Close the exhaust manifold outlet in this case
& carryout all further steps.