- Тип техники
- Бренд
Просмотр инструкции снегоходы Ski Doo MX Z 2005, страница 1046
Section 04 ENGINE (4-TEC)
Subsection 01 (LEAK TEST)
Preparation
Usingadialgaugesetthecrankshaftandthepis-
ton to precisely ignition TDC. If a dial gauge is not
available, use a screwdriver or another similarly
suitable tool.
NOTE: The engine must be set to precisely igni-
tion TDC; if this is not ensured the engine will con-
tinuetorotatewhenpressurebuildsup.
1
R1004motr35A
1. Dial gauge
Connect to adequate air supply.
Set needle of measuring gauge to zero.
NOTE: All testers have specific instructions on
gauge operation and required pressure.
Install gauge adapter into previously cleaned spark
plug hole.
Supply combustion chamber with air pressure.
Note the amount or percentage of leakage (de-
pending on tester).
LEAKAGE
PERCENTAGE
ENGINE
CONDITION
0% to 7% Excellent condition
8% to 15%
Fair condition; proceed
with tune-up or
adjustment
16% to 30%
Poor condition; engine
will run but performance
might be down in
some cases.
30% and higher
Very poor condition,
diagnose and repair
engine.
Diagnose
Listen for air leaks.
– air escaping on intake port/carburetor means
leaking intake valve(s)
– air escaping on exhaust port means leaking ex-
haust valve(s)
– air bubbles out of radiator means leaking cylin-
der head gasket
– air/oil escaping from crankcase means dam-
aged gasket and/or loosened screws (refer to
CRANKCASE)
– air/coolant escaping from cylinder/head means
damaged gasket(s) and/or loosened screws (re-
fer to CYLINDER AND HEAD)
– air escaping into crankcase area means exces-
sively worn cylinder and/or broken piston rings.
NOTE: For all the checkpoints mentioned above
see the appropriate engine section to diagnose
and repair the engine.
INSTALLATION
NOTE: Within the course of the assembly, always
replace the valve cover gasket.
Torque valve cover screws to 9 N•m(80lbf•in).
Torque spark plugs to 17 N•m (150 lbf•in).
Slightly oil the bottom outer part of the stick coil.
This will simplify installation.
For installation, reverse the preparation proce-
dure.
176 mmr2005-021
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