454 CID (7.4L) / 502 CID (8.2L) SERVICE MANUAL NUMBER 23
Page 3A-44
90-861326--1 MARCH 1999
Valve Springs - Checking Tension
IMPORTANT: Springs should be replaced if not within 10 lb. (44 N) of specified
tension.
a
b
72308
a-Valve Spring Tester (J-8056)
b-Torque Wrench
Valve Seat Repair
Valve seat reconditioning is very important, since seating of valves must be perfect for
engine to deliver maximum power and performance.
Another important factor is valve head cooling. Good contact between each valve and its
seat in head is important to ensure that heat in valve head will be properly dispersed.
Several different types of equipment are available for reseating valve seats. Equipment
manufacturer’s recommendations should be followed carefully to attain proper results.
d
c
b
a
50668
Typical “3 Angle” Valve Seat
a-Top Angle (30
°)
b-Seat Angle (46°)
c-Bottom Angle (60°)
d-Seat Width
Intake - .060-.090 in. (1.52-2.29 mm)
Exhaust - .060-.090 in. (1.52-2.29 mm)
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