Crankshafts & Pulleys

This steel 4-bolt center main cap is the best way to counteract the flexing of the Mini's 3-main bearing crank, and is considered a must for race application. Fits all 1300 A+ or Austin America blocks.

ARP heavy-duty main cap stud nut. Flanged 12-point design for maximum clamping force.

This set of main cap studs and nuts is for both pre-A+ and A+ series 1300 block, which have no removable tappet covers. These studs are stronger than the original bolts by a large factor,

A-series 850-1098cc main stud kit (for 1.750" mains only).

Billet EN40B steel crankshaft made in the UK, to fit an original 1071 Cooper S Block.

Pre-A+ front pulley bolt as used on early cars with stamped pulley or 2 piece Cooper S pulley. See TAM2019 for A+.

Center main bearing cap kit for A-Series or A+ 1300 blocks (not for Cooper S). Strengthens the center mail bearing cap.

Center main bearing cap kit for 998 and 1098 blocks. Strengthens the center main bearing cap; requires machining the cap flat before installation.

The center main bearing cap is barely adequate for a stock engine due to the flexibility and whip of the Mini's crank. For performance engines it is common to

Dynamic crankshaft damper ring to fit Cooper S pulley; machined from lightweight aluminum alloy and high-grade steel.

The stock component is often inadequate due to insufficient thread length and failure from years of use. This socket head cap screw is made in a very heavy-duty material and

Large locktab for front pulley retaining bolt when used with Cooper S two-piece pulley/damper assembly.

Original steel v-belt crankshaft pulley as fitted to Cooper S models with 2-piece front pulley assembly. See 12A0367 for the matching damper ring that must be used with this pulley.

Competition-quality crankshaft damper, made in the USA by BHJ. Used by race teams in the U.S. and Europe; conventional in design, but contains BHJ's proprietary damping material inside.

The 2-piece Cooper S front pulley assembly used this steel/rubber outer ring to reduce vibration. It can be bolted to the original AEG0454 steel v-belt pulley or the toothed

This key must fit perfectly and should be replaced if it shows any mushrooming or looseness. If it does not fit fully into the crank recess, the pulley or gear

Brand new, forged A+ 1275 crankshaft. The A+ crank has fillet-radius journals, 1.75" rod journals, and bolts directly into Mini 1300, Austin America, Mini A+ or Metro engine block.

Forged EN40B crankshaft to fit 1300 or A+ block, but with rod journal size to fit Cooper S rods. Main bearing width is 1.211 with 1.625 rod journal. Crank has ben redesigned to benefit from latest technology...

Special round dowel that fits in the main bearing caps to locate correctly and ensure bolt goes through a casing where the surfaces meet.

The KAD viscous crankshaft vibration damper uses silicon fluid inside a specially machined and balanced casing. The 6.5 pound viscous damper works over a wide rev range

Metal lock tab for use with crank pulley bolt when one-piece pulley is fitted. Bend the side over to lock into the recess of the pulley. For two-piece Cooper S pulley

For restoration purist. Six (6) of these required for all 850/998/1100 big end main caps but not always fitted to A-plus engines in the end.

There is no need to risk a failure to your otherwise bulletproof bottom end by re-using the stock 1275 main cap bolts. This set of six high-strength bolts made by

High-strength main cap bolt for A-Series or A+ 1300 engine, made by ARP.

Bolt for retaining the main bearing cap on early 1275 engines and later Mini Cooper 1300cc engines.

Main cap bolt for 1098cc engines. The bolts for the main caps should be checked and/or replaced whenever they are removed. 7/16" UNF, 2.5"long

High-strength main cap bolt for all "small bore" BMC A-Series engines. This includes 850, 948, 997, 998 and 1098 engines.

Aerospace quality ARP main cap bolt, extra length, for use with center main cap reinforcing strap. For 1300 and A+ blocks. Sold each.

Set of eight (8) high-strength studs and 12-point nuts to fit the FOR166 main cap set only.

The only means of aligning the timing gears is by using these small shims behind the crank gear. Sold each.

Steel four-bolt center main cap for Cooper S blocks. Accepts original studs, with provisions to add additional 3/8" diameter bolts.

Lightweight Cooper S-type crankshaft inner pulley, machined from a higher grade steel than the standard pulley. Has 36 teeth, making it ideal for use with an engine management system.

We have selected this heavy-duty washer to use under the front pulley bolt, to reduce the tendency of that bolt to work loose.