COMP Cams Valve Locks 3/8in Single Groove

lock angle and 3/8" valve stem size is a perfect replacement lock for stock engine rebuilds. It is recommended only for street Applications with lighter valve spring loads. It is critically important to make sure 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 OD of the stem, the locks are too small. Most people believe that the tang inside a valve lock Oldsmobile the retainer and valve spring in place while the engine is running. This is not 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.

This Part Fits:

Year	Make	Model	Submodel
1966-1967	American Motors	Ambassador	880
1966-1967	American Motors	Ambassador	990
1968-1970	American Motors	Ambassador	Base
1971-1974	American Motors	Ambassador	Brougham
1968-1971	American Motors	Ambassador	DPL
1968-1972	American Motors	Ambassador	SST
1967-1968	American Motors	American	220
1968	American Motors	American	440
1968	American Motors	American	Rogue
1968-1970,1978-1979	American Motors	AMX	Base
1966	American Motors	Classic	550
1966	American Motors	Classic	770
1978-1979	American Motors	Concord	Base
1979	American Motors	Concord	DL
1979	American Motors	Concord	Limited
1972-1975	American Motors	Gremlin	Base
1976	American Motors	Gremlin	Custom
1977	American Motors	Hornet	AMX
1970-1971,1973-1977	American Motors	Hornet	Base
1971	American Motors	Hornet	SC/360
1971-1977	American Motors	Hornet	Sportabout
1970-1972	American Motors	Hornet	SST
1971-1974	American Motors	Javelin	AMX
1968-1974	American Motors	Javelin	Base
1968-1972	American Motors	Javelin	SST
1970	American Motors	Javelin	SST Mark Donohue
1970	American Motors	Javelin	SST Trans Am
1966-1967	American Motors	Marlin	Base
1971-1978	American Motors	Matador	Base
1974	American Motors	Matador	Brougham
1974	American Motors	Matador	X
1978	American Motors	Pacer	Base
1979	American Motors	Pacer	DL
1979	American Motors	Pacer	Limited
1969	American Motors	Rambler	440
1969	American Motors	Rambler	Base
1969	American Motors	Rambler	Hurst SC/Rambler
1969	American Motors	Rambler	Rogue
1967-1968	American Motors	Rebel	550
1967-1968	American Motors	Rebel	770
1969-1970	American Motors	Rebel	Base
1967-1970	American Motors	Rebel	SST
1970	American Motors	Rebel	The Machine
1979	American Motors	Spirit	Base
1965-1975	Chevrolet	Bel Air	Base
1965-1972	Chevrolet	Biscayne	Base
1973	Chevrolet	Blazer	Base
1972	Chevrolet	Brookwood	Base
1978-1980	Chevrolet	C10	Big Ten
1975-1980	Chevrolet	C10	Cheyenne
1975-1980	Chevrolet	C10	Custom Deluxe
1975-1980	Chevrolet	C10	Scottsdale
1975-1980	Chevrolet	C10	Silverado
1968-1974	Chevrolet	C10 Pickup	Base
1968-1974	Chevrolet	C10 Suburban	Base
1975-1980	Chevrolet	C10 Suburban	Custom Deluxe
1975-1980	Chevrolet	C10 Suburban	Scottsdale
1975-1980	Chevrolet	C10 Suburban	Silverado
1990-1993	Chevrolet	C1500	454 SS
1990-1993	Chevrolet	C1500	Cheyenne
1990	Chevrolet	C1500	Scottsdale
1990-1993	Chevrolet	C1500	Silverado
1990-1993	Chevrolet	C1500	WT
1975-1981	Chevrolet	C20	Cheyenne
1981-1986	Chevrolet	C20	Custom
1975-1980	Chevrolet	C20	Custom Deluxe
1981	Chevrolet	C20	Deluxe
1975-1986	Chevrolet	C20	Scottsdale
1975-1986	Chevrolet	C20	Silverado
1968-1974	Chevrolet	C20 Pickup	Base
1968-1974	Chevrolet	C20 Suburban	Base
1981-1986	Chevrolet	C20 Suburban	Custom
1975-1980	Chevrolet	C20 Suburban	Custom Deluxe
1981	Chevrolet	C20 Suburban	Deluxe
1975-1980,1982,1984-1986	Chevrolet	C20 Suburban	Scottsdale
1975-1977,1979-1980,1982-1986	Chevrolet	C20 Suburban	Silverado
1994-1995	Chevrolet	C2500	Base
1991-1995	Chevrolet	C2500	Cheyenne
1991-1992	Chevrolet	C2500	Scottsdale
1991-1995	Chevrolet	C2500	Silverado
1994-1995	Chevrolet	C2500	WT
1992-1995	Chevrolet	C2500 Suburban	Base
1995	Chevrolet	C2500 Suburban	LS
1995	Chevrolet	C2500 Suburban	LT
1992-1994	Chevrolet	C2500 Suburban	Silverado
1975-1981	Chevrolet	C30	Cheyenne
1981-1986	Chevrolet	C30	Custom
1975-1980	Chevrolet	C30	Custom Deluxe
1981	Chevrolet	C30	Deluxe
1975-1986	Chevrolet	C30	Scottsdale
1975-1986	Chevrolet	C30	Silverado
1968-1974	Chevrolet	C30 Pickup	Base
1994-1995	Chevrolet	C3500	Base
1988-1995	Chevrolet	C3500	Cheyenne
1988-1992	Chevrolet	C3500	Scottsdale
1988-1995	Chevrolet	C3500	Silverado
1967-1972	Chevrolet	Camaro	Base
1967,1969	Chevrolet	Camaro	RS
1967-1972	Chevrolet	Camaro	SS
1972	Chevrolet	Camaro	Z28
1966-1972	Chevrolet	Caprice	Base
1973-1976	Chevrolet	Caprice	Classic
1976	Chevrolet	Caprice	Classic Estate
1976	Chevrolet	Caprice	Classic Landau
1975-1976	Chevrolet	Caprice	Classic Sport
1973-1974	Chevrolet	Caprice	Estate
1975	Chevrolet	Caprice	Estate Wagon
1965-1966,1968	Chevrolet	Chevelle	300
1967-1969	Chevrolet	Chevelle	300 Deluxe
1970-1972	Chevrolet	Chevelle	Base
1967-1972	Chevrolet	Chevelle	Concours
1969-1972	Chevrolet	Chevelle	Concours Estate
1973	Chevrolet	Chevelle	Deluxe
1969-1972	Chevrolet	Chevelle	Greenbrier
1973	Chevrolet	Chevelle	Laguna
1973	Chevrolet	Chevelle	Laguna Estate
1974-1975	Chevrolet	Chevelle	Laguna Type S-3
1966-1974	Chevrolet	Chevelle	Malibu
1974-1975	Chevrolet	Chevelle	Malibu Classic
1974	Chevrolet	Chevelle	Malibu Classic Estate
1973	Chevrolet	Chevelle	Malibu Estate
1965	Chevrolet	Chevelle	Malibu Super Sport
1968-1972	Chevrolet	Chevelle	Nomad
1971-1972	Chevrolet	Chevelle	SS
1967-1970	Chevrolet	Chevelle	SS 396
1966	Chevrolet	Chevelle	Super Sport 396
1968	Chevrolet	Chevy II	Nova
1966-1974	Chevrolet	Corvette	Base
1966-1975	Chevrolet	El Camino	Base
1968-1974	Chevrolet	El Camino	Custom
1968-1974	Chevrolet	El Camino	SS
1973-1974	Chevrolet	G10 Van	Base
1976	Chevrolet	G20	Beauville
1976	Chevrolet	G20	Chevy Van
1973-1974	Chevrolet	G20 Van	Base
1973-1974	Chevrolet	G20 Van	Sportvan
1975-1976,1988-1996	Chevrolet	G30	Beauville
1975-1976,1988-1996	Chevrolet	G30	Chevy Van
1975-1976,1988-1996	Chevrolet	G30	Hi-Cube
1988-1996	Chevrolet	G30	Sportvan
1973-1974	Chevrolet	G30 Van	Base
1965-1976	Chevrolet	Impala	Base
1975-1976	Chevrolet	Impala	Custom
1976	Chevrolet	Impala	Custom Landau
1976	Chevrolet	Impala	S
1975-1976	Chevrolet	Impala	Sport
1965-1967	Chevrolet	Impala	SS
1976,1979-1980	Chevrolet	K10	Cheyenne
1976,1979-1980	Chevrolet	K10	Custom Deluxe
1976,1979-1980	Chevrolet	K10	Scottsdale
1976,1979-1980	Chevrolet	K10	Silverado
1968-1969,1974	Chevrolet	K10 Pickup	Base
1968-1972	Chevrolet	K10 Suburban	Base
1976-1978,1980	Chevrolet	K20	Cheyenne
1976-1978,1980	Chevrolet	K20	Custom Deluxe
1976-1978,1980	Chevrolet	K20	Scottsdale
1976-1978,1980	Chevrolet	K20	Silverado
1968-1969,1973-1974	Chevrolet	K20 Pickup	Base
1973	Chevrolet	K20 Suburban	Base
1985	Chevrolet	K20 Suburban	Custom
1985	Chevrolet	K20 Suburban	Scottsdale
1985	Chevrolet	K20 Suburban	Silverado
1994-1995	Chevrolet	K2500	Base
1991-1995	Chevrolet	K2500	Cheyenne
1991-1992	Chevrolet	K2500	Scottsdale
1991-1995	Chevrolet	K2500	Silverado
1994-1995	Chevrolet	K2500	WT
1992-1995	Chevrolet	K2500 Suburban	Base
1995	Chevrolet	K2500 Suburban	LS
1995	Chevrolet	K2500 Suburban	LT
1992-1994	Chevrolet	K2500 Suburban	Silverado
1977,1980-1981	Chevrolet	K30	Cheyenne
1981-1986	Chevrolet	K30	Custom
1977,1980	Chevrolet	K30	Custom Deluxe
1981	Chevrolet	K30	Deluxe
1977,1980-1986	Chevrolet	K30	Scottsdale
1977,1980-1986	Chevrolet	K30	Silverado
1968-1971,1973-1974	Chevrolet	K30 Pickup	Base
1994-1995	Chevrolet	K3500	Base
1988-1995	Chevrolet	K3500	Cheyenne
1988-1992	Chevrolet	K3500	Scottsdale
1988-1995	Chevrolet	K3500	Silverado
1976	Chevrolet	K5 Blazer	Base
1976-1978	Chevrolet	K5 Blazer	Cheyenne
1977-1978	Chevrolet	K5 Blazer	Custom Deluxe
1978	Chevrolet	K5 Blazer	Silverado
1970-1972	Chevrolet	Kingswood	Base
1970-1972	Chevrolet	Kingswood	Estate
1970-1974	Chevrolet	Monte Carlo	Base
1973-1974	Chevrolet	Monte Carlo	Landau
1973,1975	Chevrolet	Monte Carlo	S
1969-1970	Chevrolet	Nova	Base
1988	Chevrolet	R20	Cheyenne
1987-1988	Chevrolet	R20	Custom Deluxe
1987-1988	Chevrolet	R20	Scottsdale
1987-1988	Chevrolet	R20	Silverado
1987	Chevrolet	R20 Suburban	Custom Deluxe
1987-1988	Chevrolet	R20 Suburban	Scottsdale
1987-1988	Chevrolet	R20 Suburban	Silverado
1989	Chevrolet	R2500	Cheyenne