3A-38 - ENGINES
90-823225--1 1096
Several different types of equipment are available for
reseating valve seats. Equipment manufacturer’s
recommendations should be followed carefully to at-
tain proper results.
50668
a - Top Angle (30
°
)
b - Seat Angle (46
°
)
c - Bottom Angle (60
°
)
d - Seat Width
Intake 1/32-1/16 [.031-.063] In. (0.8-1.5 mm)
Exhaust 1/16-3/32 [.063-.094] In. (1.6-2.3 mm)
Typical “3 Angle” Valve Seat
b c
d
a
Regardless of type of equipment, however, it is es-
sential that valve guide bores be free from carbon or
dirt to achieve proper centering of pilot in valve guide,
ensuring concentricity.
72338
Measuring Valve Seat Concentricity
Valve Grinding
Valves that are pitted must be refaced to the proper
angle. Valve stems which show excessive wear, or
valves that are warped excessively, must be re-
placed. When a valve head which is warped exces-
sively is refaced, a knife edge will be ground on part
or all of the valve head, due to the amount of metal
that must be removed to completely reface. Knife
edges lead to breakage, burning, or pre-ignition due
to heat localizing on this knife edge. If the edge of the
valve head is less than 1/32 in. (0.8 mm) after grind-
ing, replace the valve.
Several different types of equipment are available for
refacing valves. The recommendation of the man-
ufacturer of the equipment being used should be
carefully followed to attain proper results.
50695
EXHAUST
INTAKE
Exhaust
a - .372 In. (9.45 mm)
b - 1/32 [.031] In. (0.79 mm) Min.
Intake
a - .341 In. (8.16 mm)
b - 1/32 [.031] In. (0.79 mm) Min.
b
a
b
a
Reassembly
1. Lubricate valve guides and valve stems with en-
gine oil.
2. Install each valve in the port from which it was re-
moved or to which it was fitted.
3. Install valve guide seal (intake valve only) over
valve stem and push down until seated against
head.
4. Set valve spring (with damper installed) and
shield in place.
Содержание 305 CID
Страница 7: ...A 1 72000 IMPORTANT INFORMATION GENERAL INFORMATION...
Страница 16: ...B 1 IMPORTANT INFORMATION MAINTENANCE...
Страница 59: ...C 1 IMPORTANT INFORMATION TROUBLESHOOTING...
Страница 92: ...A 2 72975 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES...
Страница 103: ...B 2 70246 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES WITH DRIVESHAFT EXTENSION...
Страница 120: ...2 72580 C REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES...
Страница 135: ...D 2 70246 REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES WITH DRIVESHAFT EXTENSION...
Страница 154: ...E 2 70648 REMOVAL AND INSTALLATION MIE MODELS VELVET DRIVE TRANSMISSIONS...
Страница 173: ...F 2 25280 REMOVAL AND INSTALLATION MIE MODELS HURTH TRANSMISSIONS...
Страница 189: ...A 3 72615 ENGINE 5 0L 305 CID 5 7L 350 CID...
Страница 192: ...3A 0 ENGINES 90 823225 1 1096...
Страница 266: ...ELECTRICAL SYSTEMS STARTING SYSTEM A 72079 4...
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Страница 308: ...B 4 72722 90 823224 692 4B IGNITION SYSTEM ELECTRICAL SYSTEMS THUNDERBOLT IV AND V IGNITION SYSTEM...
Страница 334: ...C 4 72078 ELECTRICAL SYSTEM CHARGING SYSTEM...
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Страница 360: ...D 4 72747 ELECTRICAL SYSTEM INSTRUMENTATION...
Страница 380: ...E 4 72761 ELECTRICAL SYSTEM ELECTRICAL KITS...
Страница 393: ...F 4 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS...
Страница 427: ...A 5 50830 90 823224 692 5A FUEL DELIVERY SYSTEMS AND FUEL PUMPS FUEL SYSTEM FUEL DELIVERY SYSTEMS AND FUEL PUMPS...
Страница 438: ...B 5 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR...
Страница 467: ...C 5 72085 FUEL SYSTEMS ROCHESTER 4 BARREL CARBURETOR...
Страница 497: ...D 5 70389 90 823224 692 5B WEBER 4 BARREL CARBURETOR FUEL SYSTEMS WEBER 4 BARREL CARBURETOR...
Страница 538: ...5 71692 E FUEL SYSTEMS MULTI PORT AND THROTTLE BODY FUEL INJECTION...
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Страница 727: ...F 5 73662 FUEL SYSTEMS BOS SAV EMISSIONS...
Страница 744: ...A 6 22381 COOLING SYSTEM SEAWATER COOLING MODELS...
Страница 773: ...B 6 72987 COOLING SYSTEM CLOSED COOLED MODELS...
Страница 823: ...A 7 72699 EXHAUST SYSTEM GENERAL...
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Страница 829: ...B 7 72695 EXHAUST SYSTEM MANIFOLDS AND ELBOWS...
Страница 835: ...C 7 70593 EXHAUST SYSTEM RISERS...
Страница 843: ...THIS PAGE IS INTENTIONALLY BLANK TO ALLOW FOR CORRECTIONS OR ADDITIONS AT A LATER DATE RISERS 7C 7 90 823225 1 1096...
Страница 844: ...D 7 72737 EXHAUST SYSTEM COLLECTORS...
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Страница 856: ...A 8 DRIVES VELVET DRIVE IN LINE TRANSMISSION...
Страница 869: ...B 8 DRIVES VELVET DRIVE V DRIVE AND WALTER V DRIVE TRANSMISSION...
Страница 882: ...C 8 25280 DRIVES HURTH DOWN ANGLE TRANSMISSION...
Страница 932: ...E 8 DRIVES DRIVE SHAFT PROPELLER SHAFT MODELS...
Страница 947: ...A 9 72951 POWER STEERING PUMP...