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Engine and clutch (stock)/Crankshaft pulleys

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Location of the crankshaft pulley.
Enlarge
Location of the crankshaft pulley.
Illustration of Top Dead Center (TDC) and various degree markings on the crankshaft pulley.
Enlarge
Illustration of Top Dead Center (TDC) and various degree markings on the crankshaft pulley.
The crankshaft pulley is directly connected to the crankshaft and rotates with the engine. This page describes the various crankshaft pulleys you may find on your engine. The following terms are used:
  • Top dead center (TDC) is explained on the TDC page.
  • Front rim refers to the rim of the pulley closest to the front of the car when installed on the engine.
  • Rear rim refers to the rim of the pulley closest to the rear of the car when installed on the engine.
  • Dimple is a shallow, rounded indentation in the rim roughly 0.25" across.
  • Notch is a v-shaped cut in the rim 1-2mm wide and 1-2mm deep.

If your pulley only has a TDC mark, read the crankshaft pulley marking procedure.


Contents

[edit]

One notch

Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

One notch on front rim (no dimple)

  • TDC is not marked
  • Notch is 5° after TDC



Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

One notch on front rim (no dimple)

Note: This pulley was used in 36hp 1200cc engines through 1960

  • TDC is not marked
  • Notch is 10° before TDC



Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

Dimple on rear rim and one notch on front rim (right of dimple)

  • Dimple is TDC
  • Notch is 7.5° before TDC



Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

Dimple on rear rim and one notch on front rim (left of dimple)

  • Dimple is TDC
  • Left notch is 5° after TDC



[edit]

Two notches

Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

Dimple on rear rim and two notches on front rim (~2.5 inches apart)

  • Dimple is TDC
  • Left notch is 5° after TDC
  • Right notch is 30° before TDC



Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

Two notches on front rim (3mm or 1/8" apart) (no dimple)

  • TDC is not marked
  • Left notch is 7.5° before TDC
  • Right notch is 10° before TDC



[edit]

Three notches

Example of such a pulley.
Enlarge
Example of such a pulley.
[edit]

Three notches on front rim (3mm or 1/8" apart)

  • From left to right:
    • First notch (by itself) is TDC
    • Second notch is 7.5° before TDC
    • Right-most notch is 10° before TDC


Retrieved from "http://beetle.motorious.org/wiki/Engine_and_clutch_%28stock%29/Crankshaft_pulleys"
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