Valves, Springs, Guides and Seals

Lower valve spring locator, used only with dual valve springs. Sold each, eight (8) required for full installation.

Solid brass core plug for engine main oil galley. Fits 1/2'' hole.

This thin, plastic crankshaft oil seal was used on the later belt drive conversion kits with a plastic cover and larger diameter crank gear.

Chrome version of the retaining nut for all classic Mini valve covers. Sold each.

This extra-long valve cover nut is sometimes needed for use with slant-top aluminum valve cover.

This pair of aluminum valve cover nuts has a knurled edge, and can be cinched-down by hand.

The latest inverted-cup oil seal has a spring retainer to keep it in place; fits guides that have a machined groove to accept the seal

Special Teflon valve stem seal, to be used only with SEN0354 valve guides.

Cast iron guide for all small-bore cylinder heads. Used on both exhaust and inlet.

Genuine AE standard cast-iron valve guide. Note the short taper or bull-nose, which allows the guide to be fully supported in the head casting. AE brand is best for size

Genuine AE standard cast-iron valve guide. Note the longer taper, which allows improved flow, but check that the guide is fully supported in the head casting. AE brand is

Manganese-bronze alloy guide used to prevent damage to expensive valves. High heat transfer and durability. Guides must be honed to size after installation.

Bronze valve guide for hi-lift applications. Shorter than standard 1275 guides, with a nice taper on the end.

Bronze valve guide made specially for high-lift applications. A little shorter than 1275 guide, with a nice taper on the end.

Sometimes a valve guide with oversize diameter is needed due to a loose fit in the cylinder head casting. These guides are bronze material that gives good life and are .002'' oversize on the outside

This is a very small collar that fits around the valve stem to centralize the valve spring for situations where the spring needs to sit directly on the head to obtain the correct fitted length.

Valve spring retainer for A+ valves with triple-groove keeper; accepts single- or dual-valve spring.

Dual valve spring set for road use on 1275/1300 engines.

Set of eight (8) dual valve springs for classic Mini A-series engines. OEM equivalent.

Special Swedish spring wire is used to produce a spring that will tolerate lift of up to .490'', as is found with high-lift rockers.

Dual valve spring set for fast road/rally rpm and high valve lifts of up to 0.495''.

Modern high lift, short duration camshafts have posed quite a few problems in recent years. Widely available performance valve springs were outdated overnight, as it became necessary to reduce spring

Highest-quality valve spring set specifically designed for classic Mini race heads; proven after years of winning championships.

Top caps for dual valve springs for road use. Use with single narrow groove valves only. Eight required per car, sold each. For performance use, we recommend AEA0653 steel caps.

Cooper S-type top caps for dual valve springs, in original upgraded steel. Use with narrow single groove valves only. Eight (8) required per engine, sold each.

Pair of competition-quality valve cotter for single-groove valves. CNC-machined from 4340 and heat treated to a better spec than EN24T.

With classic Mini A+ engines came the introduction of triple goove valve keepers, also called collets, cotters, and top clips. Sold per half.

Single half keeper for single groove valve; also called collets, cotters, and top clips. Fits type B and type C single-groove valves.

Early-style valve stem keeper to fit valves with the wide groove. Used.

All 850-1098cc engines used small o-rings on the valve stem for guide oil control. Eight (8) required for full replacement; sold each.

Cup oil seal with spring retainer to keep it in place; as fitted to the MPi classic Mini

Triple-groove style exaust valve for A+ 1275cc classic Mini engines; 1.149''.

Triple-groove style intake valve with unique top cap, for A+ 1275cc applications.

Intake is 1.4" as used on MG Metro head.

Standard exhaust valve for 1275cc head. 1.15''' diameter with single narrow groove for the keepers

1.220'' (31mm) dia x 3.57 exhaust valve. Produced in EN214N steel and stellite tipped, and uses the later narrow, single collet groove.

1.3'' competition-quality valve constructed of forged EN24N stainless steel.

1.31''x3.57'' single-groove intake valve, as typically used in non-Cooper S 1275cc cylinder heads.

1.4''x3.57'' intake valve for 1275 cylinder head 12G940 or 12G1316. Uses single-groove keeper.

Many early engines used this size exhaust valves, which are recognized by the wide groove to accept the large early keepers/collets. Sold each.?

This size exhaust valve is common on small bore cylinder heads. Note single groove at top of stem, requires 88G0459 clip and appropriate top cap.

1.09" diameter intake valve for 948cc with wide groove for use with the original keepers.

1.15'' intake valve for early classic Mini Cooper 997 cylinder heads.

Triple-groove style exhaust valve, fits 998cc classic Mini engines built after 1984.

If you are working on an A+ classic Mini, you will probably find that the valves have a triple-groove style keeper. Besides the keepers, the top caps are also unique to this application.

Inlet valve in 1.156'' head diameter as found on 998cc engine with narrow keeper groove.

1.10'' single-groove intake valve as use in early A+, 1980-1984. Keeper groove is very near the top of the valve, .140''

Intake valve for 998/1098 12G206 and 12G295 cylinder head; 1.22''