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. Originally, engines had brass oilway plugs (2K1345) 1/4" hole fitted. These cup type plugs replaced them about 1985.12.7mm cup type plug about 9.6mm deep.

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.

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 hi-lift applications. A little shorter than 1275 guide, with a nice taper on the end. Intake guides are cut to take teflon seals. Order

Sometimes a valve guide with oversize diameter is needed due to a loose fit in the cylinder head casting. These guides are in a bronze material which 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, equivalent to Mini Cooper S spec.

Set of eight (8) dual valve springs for 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. Suitable for up to 7000

Dual valve spring set for fast road/rally rpm and high valve lifts of up to 0.495". These are suited to 8000 RPM and give 200# seat pressure at .400" valve

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

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 A+ engines came the introduction of triple goove valve keepers, also called collets, cotters, and top clips. Sold per half, as supplied by Rover.

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 Mini.

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

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

Intake is 1.4" as used on MG Metro head.

Standard exhaust valve for all 1275cc heads with 1.15" exhaust valve that have a single narrow groove for the top cap keepers. Verify which type of valve tip you need,

1.220" (31mm) dia x 3.57 exhaust valve. Produced in EN214N steel and stellite tipped, and uses the later narrow, single collet groove. Plasma heat treated to eradicate wear from unleaded

1.3" competition-quality valve constructed of forged EN24N stainless steel; for 1275cc 12G940 and 12G1316 cylinder heads.

1.31" x 3.57" single groove. Sold each. Typically used in non-Cooper S 1275cc cylinder heads. Verify which type of valve tip you need, see comparison picture.

1.4” x 3.57" intake valve for 1275 12G940 or 12G1316 cylinder head. Uses single-groove keeper (see comparison image).

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. Verify which type of valve

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

1.15" intake valve for early 997 Cooper cylinder heads.

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

If you are working on an A+ 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. Verify which type of valve tip you need, see comparison picture.

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

1.22" intake valve for 998/1098 12G206 and 12G295 cylinder head.

Competition quality exhaust valve. Standard single keeper groove. 1.16" x 3.57"

1.311" x 3.57 long intake valve. Competition quality, produced in EN214N steel. Standard, single groove keeper.