3-2
Engine/Transmission
This section has been organized into sub-sections
which show a progression for the complete servicing
of the Arctic Cat Prowler/XT engine/transmission.
To service the center crankcase halves, the
engine/transmission must be removed from the
frame. To service top-side, left-side, and right-side
components, the engine/transmission does not have
to be removed from the frame.
NOTE: Arctic Cat recommends the use of new
gaskets, lock nuts, and seals and lubricating all
internal components when servicing the engine/
transmission.
NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
NOTE: Critical torque specifications are located
in Section 10.
Specifications*
* Specifications subject to change without notice.
VALVES AND GUIDES
Valve Face Diameter (intake)
(exhaust)
31.6 mm (1.24 in.)
27.9 mm (1.10 in.)
Valve/Tappet Clearance (intake)
(cold engine) (exhaust)
0.1016 mm (0.004 in.)
0.1524 mm (0.006 in.)
Valve Guide/Stem (intake/exhaust)
Clearance
0.013 mm (0.0005 in.)
Valve Guide/Valve Stem (max)
Deflection (wobble method)
0.35 mm (0.014 in.)
Valve Guide Inside Diameter 5.000-5.012 mm
(0.1969-0.1973 in.)
Valve Stem Outside (intake/exhaust)
Diameter
4.972-4.987 mm
(0.1957-0.1963 in.)
Valve Stem Runout (max) 0.1 mm (0.0039 in.)
Valve Head Thickness (min) 2.3 mm (0.0906 in.)
Valve Stem End Length (min) 3.97 mm (0.156 in.)
Valve Face/Seat Width (intake)
(exhaust)
2.25 mm (0.0886 in.)
2.60 mm (0.1024 in.)
Valve Seat Angle (intake/exhaust) 45° 15’-45° 30’
Valve Face Radial Runout (max) 0.2 mm (0.0079 in.)
Valve Spring Free Length (min) 38.7 mm (1.524 in.)
Valve Spring Tension (outer)
@ 31.5 mm (1.24 in.)
19.0 kg (42 lb)
CAMSHAFT AND CYLINDER HEAD
Cam Lobe Height (min) (intake/exhaust) 13.97 mm (0.55 in.)
Camshaft Journal Oil (max)
Clearance
0.04 mm (0.0016 in.)
Camshaft Journal (right & center)
Holder Inside Diameter
(left)
21.98-22.04 mm
(0.8654-0.8677 in.)
17.48-17.53 mm
(0.6882-0.6902 in.)
Camshaft Journal (right & center)
Outside Diameter
(left)
21.96-21.98 mm
(0.8646-0.8654 in.)
17.47-17.48 mm
(0.6878-0.6882 in.)
Camshaft Runout (max) 0.05 mm (0.002 in.)
Rocker Arm Inside Diameter 12.000-12.018 mm
(0.4724-0.4731 in.)
Rocker Arm Shaft Outside Diameter 11.97-11.98 mm
(0.4713-0.4717 in.)
Cylinder Head/Cover Distortion (max) 0.05 mm (0.002 in.)
CYLINDER, PISTON, AND RINGS
Piston Skirt/Cylinder Clearance 0.045 mm (0.0018 in.)
Cylinder Bore 98 mm (3.858 in.)
Piston Diameter 15 mm (0.6 in.)
from Skirt End
97.948-97.962 mm
(3.856-3.857 in.)
Piston Ring Free End Gap (1st/2nd) 12.5 mm (0.492 in.)
Bore x Stroke 97.9 x 85 mm
(3.86 x 3.35 in.)
Cylinder Trueness (max) 0.01 mm (0.004 in.)
Piston Ring End Gap - Installed 0.36 mm (0.014 in.)
Piston Ring to Groove (1st/2nd)
Clearance (max)
0.03 mm
(0.0012 in.)
Piston Ring Groove Width (1st/2nd)
(oil)
1.202-1.204 mm
(0.0473-0.0474 in.)
2.01-2.03 mm
(0.0791-0.0799 in.)
Piston Ring Thickness (1st/2nd) 1.970-1.990 mm
(0.0776-0.0783 in.)
Piston Pin Bore (max) 23.0 mm (0.9055 in.)
Piston Pin Outside Diameter (min) 22.99 mm (0.9051 in.)
CRANKSHAFT
Connecting Rod (max)
(small end inside diameter)
23.021 mm
(0.9063 in.)
Connecting Rod (big end side-to-side) 0.6 mm (0.024 in.)
Connecting Rod (big end width) 25 mm (0.9843 in.)
Connecting Rod @ 150 mm (max)
(5.9 in.)(small end deflection)
0.3 mm (0.0118 in.)
Crankshaft (web-to-web) 71 mm (2.79 in.)
Crankshaft Runout (max) 0.03 mm (0.0012 in.)
Oil Pressure @2500 RPM
(Cooling Fan Cycling)
1.40-2.11 kg/cm
²
(20-30 psi)
Cooling Fan Thermo-Switch (offJon)
Operating Temperature (onJoff)
90°C (194°F) ±10%
75°C (167°F) ±10%
Engine Coolant Thermo-Switch
Operating Temperature
107°-113°C
(225°-235°F)
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FOR ARCTIC CAT ATV DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
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