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Leon Mk1

Position of piston at TDC: checking
Position of piston at TDC: checking
Special tools and workshop equipment required
   
t  -T20026-
Checking process
  W00-2306
On fitting new pistons or in lightened engines, the position of the piston at TDC must be checked. Depending on the prominence of the pistons, fit the corresponding cylinder head seal, following the table below:
  Note!
To measure the position of the piston at TDC, turn the engine clockwise.
  E13-0026
Piston prominenceIdentification
notches/
holes
0.91 ... 1.00 mm1
1.01 ... 1.10 mm2
1.11 ... 1.20 mm3

   
Identification of the cylinder head seal
t  Spare number = arrow 1
t  Code for the effects of management = arrow 2 (not considered!)
t  Holes = arrow 3
  Note!
If in checking the prominence of the pistons, values were obtained that differed, the largest measurement should be adopted to choose the correct seal.
  A15-0105

Engine: removing and refitting > < Engine: removal and refitting