COMP Cams Hardened Steel Street Locks; Single Groove; 12 Pieces AMERICAN MOTORS CLASSIC


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Part #: 603-12
Notes: Hardened Steel Street Locks
Single Groove
12 Pieces
Your Price: $26.28

Specs

Lock Angle
Valve Stem Size 3/8"

All Fitments

AMERICAN MOTORS
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
1965 - 1970 AMBASSADOR ALL L6 3.8 ALL ALL ALL
1966 - 1967 AMBASSADOR ALL L6 3.3 ALL ALL ALL
1971 - 1971 AMBASSADOR ALL L6 4.2 ALL ALL ALL
1964 - 1968 AMERICAN ALL L6 3.8 ALL ALL ALL
1966 - 1968 AMERICAN ALL L6 3.3 ALL ALL ALL
1978 - 1980 AMX ALL L6 4.2 ALL ALL ALL
1964 - 1966 CLASSIC ALL L6 3.8 ALL ALL ALL
1965 - 1965 CLASSIC ALL L6 3.3 ALL ALL ALL
1978 - 1983 CONCORD ALL L6 4.2 ALL ALL ALL
1978 - 1979 CONCORD ALL L6 3.8 ALL ALL ALL
1980 - 1986 EAGLE ALL L6 4.2 ALL ALL ALL
1970 - 1978 GREMLIN ALL L6 3.8 ALL ALL ALL
1970 - 1970 GREMLIN ALL L6 3.3 ALL ALL ALL
1971 - 1978 GREMLIN ALL L6 4.2 ALL ALL ALL
1970 - 1970 HORNET ALL L6 3.3 ALL ALL ALL
1970 - 1977 HORNET ALL L6 3.8 ALL ALL ALL
1971 - 1977 HORNET ALL L6 4.2 ALL ALL ALL
1968 - 1974 JAVELIN ALL L6 3.8 ALL ALL ALL
1971 - 1974 JAVELIN ALL L6 4.2 ALL ALL ALL
1965 - 1967 MARLIN ALL L6 3.8 ALL ALL ALL
1966 - 1967 MARLIN ALL L6 3.3 ALL ALL ALL
1971 - 1978 MATADOR ALL L6 4.2 ALL ALL ALL
1971 - 1974 MATADOR ALL L6 3.8 ALL ALL ALL
1975 - 1978 PACER ALL L6 3.8 ALL ALL ALL
1975 - 1980 PACER ALL L6 4.2 ALL ALL ALL
1969 - 1969 RAMBLER ALL L6 3.3 ALL ALL ALL
1969 - 1969 RAMBLER ALL L6 3.8 ALL ALL ALL
1967 - 1967 REBEL ALL L6 3.3 ALL ALL ALL
1967 - 1970 REBEL ALL L6 3.8 ALL ALL ALL
1979 - 1979 SPIRIT ALL L6 3.8 ALL ALL ALL
1979 - 1983 SPIRIT ALL L6 4.2 ALL ALL ALL
JEEP
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
1974 - 1983 CHEROKEE ALL L6 4.2 ALL ALL ALL
1972 - 1978 CJ5 ALL L6 3.8 ALL ALL ALL
1972 - 1983 CJ5 ALL L6 4.2 ALL ALL ALL
1972 - 1975 CJ6 ALL L6 3.8 ALL ALL ALL
1972 - 1975 CJ6 ALL L6 4.2 ALL ALL ALL
1976 - 1978 CJ7 ALL L6 3.8 ALL ALL ALL
1976 - 1986 CJ7 ALL L6 4.2 ALL ALL ALL
1972 - 1974 DJ5 ALL L6 3.8 ALL ALL ALL
1973 - 1974 DJ5 ALL L6 4.2 ALL ALL ALL
1984 - 1986 GRAND WAGONEER ALL L6 4.2 ALL ALL ALL
1974 - 1987 J10 ALL L6 4.2 ALL ALL ALL
1974 - 1976 J20 ALL L6 4.2 ALL ALL ALL
1972 - 1973 J-2500 ALL L6 4.2 ALL ALL ALL
1972 - 1973 J-2600 ALL L6 4.2 ALL ALL ALL
1972 - 1973 JEEPSTER ALL L6 3.8 ALL ALL ALL
1972 - 1973 JEEPSTER ALL L6 4.2 ALL ALL ALL
1981 - 1985 SCRAMBLER ALL L6 4.2 ALL ALL ALL
1972 - 1983 WAGONEER ALL L6 4.2 ALL ALL ALL
1987 - 1988 WRANGLER ALL L6 4.2 ALL ALL ALL

Product Description

Most people believe that the tang inside a valve lock holds the retainer and valve spring in place while the engine is running, but this isn’t the case. The cross-section of material in the tang is not strong enough to withstand open spring loads of 1000 lbs. or more. The sole purpose of the tang is to temporarily locate the lock, retainer and spring relative to the valve until the taper of the retainer can nest around the outside surface of the lock. This creates a “collet” effect that binds the two together. The more spring force exerted on the retainer (as the valve opens), the more force applied by the “collet” effect to keep the retainer and lock in place.

With the emergence of valve sizes other than the standard 5/16”, 11/32” and 3/8”, it is important to make sure the valve locks match the valve size. There should always be a small gap between the two halves of the lock when they are properly positioned on the valve stem. If the two halves fit together without a gap, they are too large. If the locks fit tight to the stem and leave a gap between the middle of the lock and the O.D. of the stem, the locks are too small.

Our line of stock replacement 7° valve locks for stock engine rebuilds are recommended only for street applications with lighter valve spring loads and are stamped and hardened for superior wear resistance. Also available are machined 7° locks and titanium Super 7º Locks for some applications. They offer the same valve spring location accuracy as our Super Locks™ without the need to change to 10° retainers.

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