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- MED S PULLEY - STANDARD
MED S PULLEY - STANDARD
Description
Our lightweight steel billet crankshaft pulley is a direct replacement for the original, with the option to bolt-on a large MED Dynamic Damper Ring for improved crankshaft vibration damping.
If you wish to install the damper, it's best purchased as a complete balanced MED S Damper Kit with bolt and washer.
The pulley suits regular V-belts and will fit all A-Series engines apart from the final MPi Minis.
For engine management applications, we produce an alternative management type with integral 36:1 trigger wheel teeth.
Frequently Asked Questions
Does this suit all A-Series engines?
Yes, apart from the very last MPi Minis, as these run a multi-rib belt in place of the traditional V-belt.
Why is this called an 'S Pulley'?
It stems from the design of the original two-piece Cooper S crankshaft pulley and damper.
Do I need to balance the pulley?
If fitted as a standalone item, no, there should be no need to balance the pulley. If you do decide to install the optional MED damper, then this is best balanced as an assembly.
Can I use the standard pulley bolt?
Yes, either that or our uprated bolt, part number MED-1410-CB, which has a longer thread for better engagement.
What is the diameter of this pulley?
The overall diameter is 120mm, or 4.72-inches.
Do you have any fitting advice?
The pulley should be a snug fit on the crankshaft tail, but if you find it is too snug, do not just tighten the bolt and hope for the best. Firstly remove the crankshaft key and re-try the pulley in place. If it is still too tight, there may be a burr on the end of the crankshaft that will need to be addressed. If it now fits well, take a look at the key and ensure it can be fitted squarely back into the crankshaft and is also free of any burrs. On certain brand new steel crankshafts, occasionally you may need to lightly hone the centre bore to give a good fitment. If the pulley is too loose, be careful as the tail of the crankshaft may be worn.
What size screws will I need to fix this to the crankshaft damper?
We use 5/16" UNF x 7/8" with a flat washer and the lock tab.
Related Products
MED DYNAMIC CRANK DAMPER RING
MED S DAMPER KITS
MED S PULLEY MANAGEMENT - FLAT
MED S PULLEY MANAGEMENT TYPE
MED CRANK PULLEY LOCK PLATE
MED DAMPER PULLEY BOLT
CRANKSHAFT WOODRUFF KEY
MED ALLOY WATER PUMP PULLEY
MED LARGE ALTERNATOR PULLEY
MED RACE WATER PUMP
