Valve Spring Shims
To avoid the loss of metal from grinding valve seats, and to restore the proper spring tension, it is best to replace the lost material by installing a Valve Spring Shim under the spring.
Summary
Specifications
| Type A 0.060 Springs in Service | Type B 0.030 for New Springs | Type C 0.015 for Spring Bal | Applications | O.D | I.D |
| A-100 | B-100 | C-100 | Buick, Minn. Moline, Toyota, Datsun-Nissan, Wauk., Pont., Chev Trk., Porsche | 1.312 | .954 |
| A-101 | B-101 | C-101 | AMC, Case, Ford Trac., Toyota, Fiat, Triumph, Volvo, Cummins, Porsche | 1.000 | .688 |
| A-102 | B-102 | C-102* | American Motors, Chrysler, Ford, Lincoln, Ford TR, John Deere, Herc., Datsun | 1.360 | 1.000 |
| A-103 | B-103 | C-103* | Chevrolet, Chrysler, Ford Lincoln, Minn. Moline, Pontiac, Ford Trk., AMC | 1.500 | 1.031 |
| A-104 | B-104 | C-104 | Ford, Oliver, Wauk., Honda Motorcycle, Continental, Renault | 1.000 | .765 |
| A-105 | B-105* | C-105 | Case, Cat., Detroit Diesel, Fiat, Ford, Porsche, Pont., V.W, Harley-Davidson | 1.218 | .875 |
| A-106 | B-106 | C-106 | Case, Cheverolet, MG, Opel, Citroen, V.W, Fiat, Mercedes, IHC | 1.100 | .719 |
| A-107 | B-107* | C-107 | Chevrolet, Honda, Audi, Mazda, BSA, Porsche, Jaguar, Chrysler, Toyota | 1.250 | .625 |
| A-107S | B-107S | C-107S | Halrey-Davidson XR Series, Norton, Caterpillar, Subaru | 1.250 | .680 |
| A-200* | B-200 | C-200HP* | Austin, Chev., IHC Trac., Jeep, MG, Opel Auto-car, Chev Trk., MW, Isuzu | 1.360 | .640 |
| A-201* | B-201* | C-201* | Buick, Chevrolet, Cummins, Ford Ger., Herc., Jeep, Olds., Pont., AMC, Cadilliac | 1.250 | .875 |
| A-202* | B-202* | C-202* | Buick, Chrysler, Continental, GMC, Porsche, Renault, Det. Diesel, John Deere | .915 | .640 |
| A-203* | B-203* | C-203* | Cadillac, Chevrolet, Mack, John Deere, Buick, Pontiac, Mazda | 1.250 | .812 |
| A-204 | B-204 | C-204 | GMC 53 series 4 valve head, Fiat, Detroit Diesel, Wauk. | .796 | .515 |
| A-204S | B-204S | C-204S | Harley – Davidson 74 series & Sportster, BSA, Honda, Triumph | .760 | .578 |
| A-300* | B-300* | C-300* | AMC, Chry., Mack, White, Cat., J.D., Mercedes, Ford, Jeep, Cummins, Honda, Toyota | 1.125 | .719 |
| A-301* | B-301* | C-301HP* | Pontiac, GMC, Ford Tr., Mercedes, Triumph, HGerley-Davidson, Ford Br. | 1.375 | .765 |
| A-302* | B-302* | C-302* | AMC, Mack, Case, Cat., Toyota, Chev., Porsche | 1.312 | .765 |
| A-303* | B-303* | C-303* | Chevrolet, Olds, IHC Trk., Pont., Buick, Chev. Trk., Mack, Cadillac | 1.480 | .703 |
| A-304 | B-304 | – | Case, Caterpiller, Perkins | 1.500 | 1.156 |
| A-305* | B-305* | C-305HP* | Pontiac, Datsun-Nissan, Mack | 1.437 | .785 |
| A-306* | B-306* | C-306* | Ford, Chevrolet Speacial Small Block, Old., Caterpiller | 1.437 | .645 |
| A-400 | B-400 | – | Cummins, IHC Trk., Dodge Trk., Oliver | 1.750 | .820 |
| A-401 | B-401 | – | Mack, Reo, White, Allis-Chalmers, Le Reo | 1.600 | .820 |
| A-403 | B-403 | – | Dodge Trk., Perkins, Ford, Chevrolet Trk., White, IHC Tractor, John Deere | 1.375 | .781 |
| A-404 | B-404 | – | Chev. Trk., Cummins, GMC, IHC TRK., Wauk., Auto Car, Caterpillar | 1.500 | .875 |
| A-405 | B-405 | – | John Deere | 1.750 | .890 |
| A-406 | B-406 | – | Cummins, Waulk., Ceterpillar, Minn. Moline | 1.750 | 1.328 |
| A-407 | B-407 | – | Buda, Cummins, Wauk., White, Caterpillar, Allis-Chalmers | 1.156 | .828 |
| A-408 | – | – | GMC Md. #71 Two Valve, Detroit Diesel, Austin | 1.140 | .570 |
| A-409 | – | – | NTC 250, 270 and 355 Cummins, IHC | 1.312 | .755 |
| A-502** | – | – | Same installation as A-102 | 1.360 | 1.000 |
| A-503** | – | – | Same installation as A-103 | 1.500 | 1.031 |
| A-506** | – | – | Same installation as A-306 | 1.500 | .645 |
| A-600 | – | – | Caterpillar Md. #D-7 and D-8 | 1.937 | 1.250 |
| A-101HP | B-101HP | C-601HP* | Chevy, Chrysler., Ford w/re-machined guide (use with 3 springs per valve) | 1.640 | .635 |
| VA-801 | – | – | Chevy, Buick, Pont., Cadillac | 1.250 | .812 |
* Available in High Performance – add suffix ‘HP’ – Type A & B HP series are hardened inserts. Type C HP series are special blue temper steel.
** SPRING CUPS are necessary for applications with step or flush spring pad areas.
Cups also control spring walk – use as an option for the following applications: A-502 same appliaction as A-102, A-503 same application as A-103, and A-506 same application as A-306.
