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Workshop Reference
Type 1 Machine Sizes
VW upright air-cooled engine machining reference — piston, case, head and cylinder type by displacement.
TYPE 1 MACHINE SIZES
Engine machining sizes
| Spec | 1600cc | 1641cc | 1679cc (Slip-In) | 1679cc (Machine-In) | 1776cc (Machine-In) | 1835cc (Thin Walls) | 1835cc (Thick Walls) | 1914cc (Machine-In) |
|---|---|---|---|---|---|---|---|---|
| Piston diameter (mm) | 85.5 | 87 | 88 | 88 | 90.5 | 92 | 92 | 94 |
| Case machining size (mm) | 90 | 90 | 90 | 94.4 | 96 | 96 | 96 | 97.25 |
| Head machining size (mm) | 93.8 | 93.8 | 93.8 | 97 | 98 | 98 | 101.1 | 101.1 |
| Cylinder type | Slip-In | Slip-In | Slip-In | Machine-In | Machine-In | Machine-In (Thin Walls) | Machine-In (Thick Walls) | Machine-In |
Based on common Type 1 big-bore and slip-in/machine-in combinations. Confirm bore and machining sizes with your chosen piston/cylinder kit before cutting.
All sizes are in millimetres. Always verify final machining dimensions against your piston and cylinder supplier's instructions.
Aircooled Hut
VW & Porsche air-cooled engine builds, machine work and parts.
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