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| Volkswagen Engine >> CYLINDER HEAD THICKNESS ON WATER COOLED ENGINES
Cylinder Head Thickness On
Water Cooled Volkswagen 4 Cylinder Engines
The minimum cylinder head thickness for Volkswagen 1.5L, 1.6L, 1.7L and 1.8L gasoline engines is 5.215 as measured from the deck surface to the valve cover rail. See illustration below. Although AERA members report following the above specification for 1.5L and 1.6L diesel cylinder heads as well, Volkswagen's official position is that the diesel cylinder heads are not to be
resurfaced. Heads warped more than .003 are to be replaced.
AERA members are reminded that the diesel engines have 5 different thicknesses of cylinder head gaskets identified by the number of notches located on a tab on the side of the gasket. The proper gasket is selected based on piston protrusion and size of engine, not cylinder head thickness. The table below indicates the proper gasket selection.
Piston Gasket Notches
Projection Thickness 1500cc 1600cc
.025-.032 .055 3 1
.033-.036 .059 4 2
.037-.040 .063 5 3
The AERA Technical Committee
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