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Chevy Small-Block V8  |  Valve Spring Retainers
 

 
 
 
Quick Reference Charts

Large Cat. Image
Modifier      
10045007 Spring Cap      
Used on all ZZ3 Series 350 HO engines.   Small Image
Technical Notes: When converting ZZZ/ZZ1 or ZZ2 series engines to the ZZ3 series cap, you must remove valve spring shield and add cap P/N 10045007, seal P/N 60483, and spacer P/N 0185066 (1 each).

Modifier      
10168424 Valve Spring Cap      
Used on 1992-93 Corvette LT1 engines. This lightweight cap is to be used with spring P/N 10206040.   Small Image
 

Modifier      
10212808 Valve Spring Cap LT4 - ZZ4      
These valve spring caps are used on 1996 LT4 Corvette and ZZ4 engines as well as the special service only heads P/N 12556463. These are light weight caps.   Small Image
Technical Notes: Use with spring P/N 12551483.

Modifier      
12495492 Valve Spring Cap Kit, LT4      
This valve spring cap kit which includes 16 of P/N 10212808 caps, is used on all 5.7L LT4 engines. These are light weight caps to be used with valve spring kit P/N 12495494, and key kit P/N 12495503.   Small Image
 

Modifier      
12495493 Valve Spring Cap, 350 HO Engine      
This valve spring cap kit, which includes 16 of P/N 14003974 caps, is used on all 350 HO engines. These are base V8 engine caps to be used on most V8 and V6 engines.   Small Image
 

Modifier      
12495503 Valve Spring Keys      
This valve spring key kit includes 32 P/N 24503856 keys for 11/32" valve stems.   Small Image
 

Modifier      
14003974 Steel Valve Spring Retainer      
For valve springs P/N 3911068, P/N 10134358, and P/N 3927142. This retainer is 13/32" in diameter, and is stamped with an "A". Used on ZZZ, ZZ1, ZZ2 350 HO engines and 350 300 HP engines.   Small Image
 

Modifier      
24503856 Valve Spring Key      
Split locks for 11/32" valve stems. These keys are suitable for both production and racing engines. They are color-coded copper. Order 32 keys for a V8, 24 for a V6.   Small Image
 

Modifier      
330586 Aluminum Valve Spring Retainer      
For valve spring P/N 330585.   Small Image
 

Modifier      
366254 Titanium Valve Spring Retainer      
For valve spring P/N 366282.   Small Image
 


Valve Springs - Small-Block V8 and V6/90 Degree Quick Reference Chart

Part Number

Description

Outside Diameter

Pressure at Installed Height

Solid Height

Average Rate Pounds per Inch

Retainer Part Number

Valve Seal Kit

Notes

3911068

Single w/damper

1.241"

80# @ 1.70"

1.15"

267

14003974

10132715

Production spring used with special high-performance 350ci, 300 HP (SP) engine.

3927142

Single w/damper

1.273"

110# @ 1.70"

1.16"

358

14003974

10132715

Use with camshaft #3927140 and all high-performance production cams to extend rpm range.

10134358

Single w/damper

1.273"

110# @ 1.70"

1.16"

356

14003974

10132715

Chrome silicon steel; used with 10185086 aluminum head assembly. Orange color code.

330585

Dual

1.379"

140# @ 1.75"

1.15"

325

330586

10132715

Use with camshaft #3927140, 3965754 and all moderate lift racing cams.

366282

Dual w/ damper

1.525"

128# @ 1.70"

1.26"

406

366254

After- market

Use with high-lift mushroom or roller tappet racing cams (.625" lift).

10206040

Single Spring

1.30"

85# @ 1.78"

1.26"

373

10168424

NA

1992-93 LT1 production Corvette engine

12551483

Single Spring

1.32"

101# @ 1.78"

1.22"

332

10212808

NA

1996 LT4 Corvette and ZZ4 engines.

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