The crankshaft pulley and alternator or generator pulleys are of utmost importance for a VW engine. Of course the pulleys spin the alternator or generator providing the electrical power for the car. Most importantly the pulleys spin the fan that cools your air cooled dune buggy engine. We offer stock style replacement pulleys as well as sand sealed and power pulleys.
Sand sealed pulleys add a dust seal to the crankshaft pulley which does not have a seal from the factory. Sand seals require that a spacer be epoxied to the case or that the engine case be machined to accept the seal. Power pulleys are a smaller diameter pulley that draws less power from the engine freeing up horsepower. Keep in mind that the smaller pulley will spin the fan slower decreasing cooling and charging output.
Alternator and generator pulleys are available in different finishes and different styles including a completely billet aluminum version. The pulley tension is adjusted with shims to push the fan belt higher in the pulley or lower in the pulley. We offer the most common fan belt sizes and the shims used to adjust them. If you're worried about hands getting caught in the belt, a few different pulley guards are available as well.
Stock Replacement Crankshaft Pulleys
Stock sized pulleys come in steel or aluminum with various finishes. All stock replacement pulleys have the reverse swirl hub that directs and excessive oil back towards the case. Timing marks on the degree pulleys help when setting ignition timing.
Stock Diameter Sand Sealed Pulleys
VW never put a seal at the crankshaft pulley from the factory on Type 1 engines. Sand seal pulleys help to keep debris out with a machine in seal or glue in hub and seal. Keep in mind the seals are merely to keep debris out, they are not designed to keep oil in. If oil is coming out of the crankshaft pulley area you have too much crank case pressure.
Power pulleys increase horsepower but decrease cooling and charging by turning the fan slower. Standard and sand seal pulleys are both available.
Pulley & Belt Kits
For high revving engines the serpentine belt kit is the way to go and looks great as well!
Pulley Nuts & Bolts, Sand Seals & Spacers
Hold your pulleys where they should be with chrome pulley bolts and nuts. When installing a glue in sand seal, the pulleys sit futher back so spacers are needed along with a longer crankshaft bolt.
Generator & Alternator Pulleys
The split style upper pulleys are adjusted with shims. More shims in between the pulleys will loosen the belt as it rides lower in the groove. Less shims will tighten the belt as it rides higher on the pulley. Make sure to put the remaining shims on the outside of the pulley before installing the pulley nut and spacer.
A very important part of your engine's cooling system and charging system. Every Off Road Buggy should have a spare fan belt on hand.
Pulley guards bolt to the engine case and provide a small amount of protection for the crankshaft and upper pulley.