volkswagen Workshop Repair Guides

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Cylinder head gasket identification > < Separating new conrod
Measuring piston projection at TDC
   
Measuring piston projection at TDC
Special tools and workshop equipment required
t  Measuring bridge -VW 382/7- from measuring tool -VW 382-
t  Measuring plate -VW 385/17- from universal measuring tool -VW 385-
t  Dial gauge -VAS 6079-

Test procedure
–  Secure dial gauge -VAS 6079- with measuring bridge -VW 382/7- and measuring plate -VW 385/17- to cylinder block as shown in the illustration.
   
–  Measure the projection of each piston at the two points marked with -arrows- (at the rear side and front side of the piston seen in the longitudinal direction of the engine).
Piston projection at TDC must be measured when new pistons or a short engine is installed. Install the appropriate cylinder head gasket depending upon piston projection, according to following table:
  Note
t  To measure the piston projection at top dead centre, turn the engine clockwise.
t  If different values are determined during the projection measurement, use the largest dimension for selecting the gasket.
  A13-10694
Piston projectionIdentification
Holes/notches
0.91…1.00 mm1
1.01…1.10 mm2
1.11…1.20 mm3

   

Cylinder head gasket identification > < Separating new conrod