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 7 Locks for some applications. They offer the same valve spring location accuracy as our Super Locks without the need to change to 10 degree retainers.
| Years | Make | Model | Trim | ||
|---|---|---|---|---|---|
| 1994 - 1996 | Buick | Commercial Chassis | Base | ||
| 1994 - 1995 | Buick | Roadmaster | Base | ||
| 1994 - 1995 | Buick | Roadmaster | Limited | ||
| 1994 - 1995 | Buick | Roadmaster | Estate Wagon | ||
| 1994 - 1996 | Cadillac | Commercial Chassis | Brougham | ||
| 1994 - 1996 | Cadillac | Commercial Chassis | Base | ||
| 1994 - 1996 | Cadillac | Fleetwood | Brougham | ||
| 1994 - 1996 | Cadillac | Fleetwood | Base | ||
| 1993 - 1997 | Chevrolet | Camaro | Z28 | ||
| 1993 - 1993 | Chevrolet | Camaro | Indianapolis 500 Pace Car | ||
| 1994 - 1994 | Chevrolet | Caprice | Classic LS | ||
| 1994 - 1996 | Chevrolet | Caprice | Classic | ||
| 1992 - 1996 | Chevrolet | Corvette | Base | ||
| 1993 - 1993 | Chevrolet | Corvette | 40th Anniversary Edition | ||
| 1995 - 1995 | Chevrolet | Corvette | Indianapolis 500 Pace Car | ||
| 1996 - 1996 | Chevrolet | Corvette | Grand Sport | ||
| 1994 - 1996 | Chevrolet | Impala | SS | ||
| 1993 - 1997 | Pontiac | Firebird | Formula | ||
| 1993 - 1997 | Pontiac | Firebird | Trans Am | ||
| 1994 - 1994 | Pontiac | Firebird | Trans Am GT |
IN STOCK McLeod Racing 1540McLeod Racing Hardware McLeod Bolts Pak 7/16in Crank To Flywheel (6 Per Box) $52.89
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IN STOCK - LOW Cometic Gasket C5389-032Cometic Gasket AFM Gaskets Cometic Chevy/Dodge/Ford .032in AFM Fuel Pump to Block Gasket |
IN STOCK - LOW Mahle OE 2243497Mahle OE OE Cast Piston Sets -8 Cyl Mahle OE GM 5.7L 101V13A3 STD w/ Pin Eng Pack Piston Set (Set of 8) $209.10
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IN STOCK - LOW McLeod Racing 1500McLeod Racing Hardware McLeod Bolt Pak 3/8in Pressure Plate Small Hex Head (6 Per Box) $53.31
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IN STOCK Clevite CB663P(8)Clevite Con Rod Bearing Set Clevite Chevy V8 305-350-400 1967-95 Con Rod Bearing Set $66.61
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IN STOCK Clevite CB663HNClevite Con Rod Bearing Set Clevite GMC Pass & Trk 262 267 302 305 5.0L 307 5.0L 327 350 5.7L 400 Con Rod Bearing Set $36.36
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IN STOCK - LOW Victor Reinz 953610Victor Reinz Gasket Kits MAHLE Original GM 5.7L 350 CID V8 Vin P (Except 93-97 Corvette) Engine Kit Gasket Set $198.65
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IN STOCK King Engine Bearings CR807XPNSTDXKing Engine Bearings Performance Rod Bearings King Engine Bearings Chevy LS1/LS6/LS3 Performance Rod Bearing Set - Size STDX $108.79
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For more information on COMP Cams part number 648-100, you can visit the official COMP Cams website.