Cooling System - Yamaha Vector RS90GTA Owner's Manual

Recommended engine oil:
See page 122.
Oil quantity:
With oil filter cartridge replacement:
RS90GT 3.3 L (3.49 US qt,
2.90 Imp.qt)
RS90LTGT 3.3 L (3.49 US qt,
2.90 Imp.qt)
RST90 3.0 L (3.17 US qt,
2.64 Imp.qt)
RST90GT 3.3 L (3.49 US qt,
2.90 Imp.qt)
Without oil filter cartridge replace-
ment:
RS90GT 3.1 L (3.28 US qt,
2.73 Imp.qt)
RS90LTGT 3.1 L (3.28 US qt,
2.73 Imp.qt)
RST90 2.8 L (2.96 US qt,
2.46 Imp.qt)
RST90GT 3.1 L (3.28 US qt,
2.73 Imp.qt)
Total amount:
RS90GT 4.0 L (4.23 US qt,
3.52 Imp.qt)
RS90LTGT 4.0 L (4.23 US qt,
3.52 Imp.qt)
RST90 3.7 L (3.91 US qt, 3.26 Imp.qt)
RST90GT 4.0 L (4.23 US qt,
3.52 Imp.qt)
18. Install and tighten the oil filler cap.
19. Start the engine, and then let it idle for
several minutes while checking it for oil
leakage. If oil is leaking, immediately turn
the engine off and make sure that the en-
gine oil drain bolts, the cylinder head cap,
and the oil filler cap are installed correct-
ly.
20. Turn the engine off, and then connect the
oil level gauge coupler. NOTICE: If oil is
leaking or the oil level warning indica-
tor comes on when the engine is run-
ning, immediately turn the engine off
and have a Yamaha dealer check the
snowmobile. Continuing to operate
Periodic maintenance and adjustment
the engine under such conditions
could cause severe engine damage.
[ECS00471]
21. Place the bottom panel in the original po-
sition, and then install the bolts.
22. Place the right lower cover in the original
position, and then install the screws.
(RS90GT / RS90LTGT / RST90GT)
RS90GT / RS90LTGT / RST90GT
1. Right lower cover
23. Install the top cover, the right side cover,
and the shroud (RS90GT / RS90LTGT /
RST90GT), or install the right side cover
and close the shroud (RST90).
ESU14202

Cooling system

The coolant level should be checked before
each ride. In addition, the cooling system
must be bled at the intervals specified in the
periodic maintenance and lubrication chart.
EWS00380
WARNING
Do not remove the coolant reservoir cap
when the engine is hot. Scalding hot fluid
and steam may be blown out under pres-
sure, which could cause serious injury.
When the engine has cooled, place a thick
rag or towel over the coolant reservoir
cap, and slowly rotate the cap counter-
clockwise to the detent. This procedure al-
lows any residual pressure to escape.
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