3.30
ENGINE
4.
Inspect the cut area of the seat:
* If the contact area is less than 75% of the circumference of the
seat, rotate the pilot 180
°
and make another light cut.
* If the cutter now contacts the uncut portion of the seat, check
the pilot. Look for burrs, nicks, or runout. If the pilot is bent it
must be replaced.
* If the contact area of the cutter is in the same place, the valve
guide is distorted from improper installation
* If the contact area of the initial cut is greater than 75%,
continue to cut the seat until all pits are removed and a new seat
surface is evident.
NOTE:
Remove only the amount of material
necessary to repair the seat surface.
5.
To check the contact area of the seat on the valve face, apply
a thin coating of Prussian Blue
™
paste to the valve seat. If
using an interference angle (46
°
) apply black permanent
marker to the entire valve face (A).
6.
Insert valve into guide and tap valve lightly into place a few
times.
7.
Remove valve and check where the Prussian Blue
™
indicates seat contact on the valve face. The valve seat
should contact the middle of the valve face or slightly
above, and must be the proper width.
* If the indicated seat contact is at the top edge of the valve face
and contacts the margin area (B) it is too high on the valve face.
Use the 30
°
cutter to lower the valve seat.
* If too low, use the 60
°
cutter to raise the seat. When contact
area is centered on the valve face, measure seat width.
* If the seat is too wide or uneven, use both top and bottom
cutters to narrow the seat.
* If the seat is too narrow, widen using the 45
°
cutter and re-
check contact point on the valve face and seat width after each
cut.
NOTE: When using an interference angle, the seat
contact point on the valve will be very narrow, and is
a normal condition. Look for an even and
continuous contact point all the way around the
valve face (A).
A
=
In. / mm.
Valve Seat Width:
Intake Std: .028" (.7 mm)
Limit: .055" (1.4 mm)
Exhaust Std: .039I (1.0 mm)
Limit: .071" (1.8 mm)
B
A
Proper Seat Contact
on Valve Face
Bottom 60
°
Seat 45
°
Top 30
°
Seat
Width
Summary of Contents for 2008 Ranger RZR
Page 9: ...1 9 GENERAL INFORMATION 1 SAE Tap Drill Sizes Metric Tap Drill Sizes Decimal Equivalents ...
Page 16: ...2 6 MAINTENANCE COMPONENT INSPECTION SERVICE LOCATIONS Front and Rear View ...
Page 17: ...2 7 MAINTENANCE 2 RH and LH Side Views ...
Page 42: ...3 2 ENGINE ENGINE SPECIFICATIONS Crankcase Exploded Views ...
Page 43: ...3 3 ENGINE 3 Oil Pump Water Pump Engine Cover Exploded View ...
Page 44: ...3 4 ENGINE Stator Cover Starter Water Pump Oil Filter Pressure Relief Exploded View ...
Page 45: ...3 5 ENGINE 3 Cylinder Cylinder Head Piston Exploded View ...
Page 104: ...NOTES ENGINE 3 64 ...
Page 139: ...4 35 ELECTRONIC FUEL INJECTION 4 Fuel Injector PTO Circuit Fuel Injector MAG Circuit ...
Page 142: ...4 38 ELECTRONIC FUEL INJECTION Throttle Position Sensor TPS Circuit Fuel Pump Circuit ...
Page 230: ...NOTES FINAL DRIVE 7 36 ...
Page 287: ...10 17 ELECTRICAL 10 COOLING SYSTEM SCHEMATIC Cooling System Break Out Diagram ...
Page 308: ...10 38 ELECTRICAL Instrument Cluster Circuit Transmission Switch Circuit ...
Page 309: ...10 39 ELECTRICAL 10 Wheel Speed Sensor Circuit AWD Circuit ...
Page 310: ...10 40 ELECTRICAL Fuel Gauge Display Circuit Cooling Fan Circuit ...
Page 311: ...10 41 ELECTRICAL 10 Charging System Circuit ...
Page 312: ...NOTES ELECTRICAL 10 42 ...