General; Troubleshooting; Cleaning; Disassembly - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

Section 04 ENGINE
Subsection 03 (443 AND 552 ENGINE TYPES)

GENERAL

CAUTION: While performing any engine related
procedure, always make sure that the working
area is clean and free from dust or particles to
reduce the risk of damaging the engine.

TROUBLESHOOTING

Before completely disassemble engine, check air-
tightness. Refer to LEAK TEST AND ENGINE DI-
MENSION MEASUREMENT.
NOTE: The following procedures can be done
without removing the engine from chassis.

CLEANING

Discard all gaskets. Use gasket remover (P/N 413
708 500) to clean mating surfaces.
Clean all metal components in a non-ferrous metal
cleaner.
Scrape off carbon formation from cylinder exhaust
port, cylinder head and piston dome using a wood-
en spatula.
NOTE: The letters "AUS" and arrow on the pis-
ton dome must be visible after cleaning.
Clean the piston ring grooves with a groove clean-
er tool, or with a piece of broken ring.

DISASSEMBLY

Remove top fan cowl, intake sockets and lower
fan cowl.
Remove cylinder heads.
Place a clean cloth or rubber pad (P/N 529 023 400)
over crankcase to prevent circlips no. 10 from fall-
ing into crankcase. Then with a pointed tool insert-
ed in piston notch, remove both circlips from pis-
ton no. 8.
04-03-6
A02C29A
TYPICAL
443 and 552 Engines
On these engines, piston pin needle bearing is
mounted without a cage.
NOTE: The PTO cylinder or fan housing have to be
removed to give access to MAG piston pin with
the puller.
Use piston pin puller (P/N 529 035 503) along with
18 mm sleeve kit (P/N 529 035 541) for 443 or
20 mm sleeve kit (P/N 529 035 542) for 552 and
locating sleeve (P/N 529 023 800).
NOTE: The locating sleeve is the same that con-
tains new cageless bearing.
Insert piston pin puller (P/N 529 035 503) making
sure it sits squarely against piston.
MMR2004-112_04_03A.FM