AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual TT 1996 8N / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/960/w960_960-0.png AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual

Page 41 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-65
      
Installing  
    
CAUTION!  -  Place plastic sleeve -A- on valve stem to prevent damage to new valve 
stem oil seals. 
-  Lightly oil lip of valve stem oil seal -B-.
-  Insert valve stem

Page 42 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-66
      
Valve guides, checking
 
     
Special tools and equipment  
     
VW387 dial gauge holder 
     Dial indicator
    
CAUTION! 
Due to differences in valve stem diameter, make sure that on

Page 43 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-67
      
Valve guides, replacing
 
     
Special tools and equipment  
     
VW411 punch 
     3120 reamer (7mm) and cutting fluid
     3360 driver 
     3361 press-in pad
     
Removing  
     
-

Page 44 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-68
 
    
-  Insert 3361 press-in pad as follows:
-  Install mounting pins for cylinder head bolt holes -A- into threaded hole 
position -2- and -3-. 
-  Install pin -B- into relevant hole for valv

Page 45 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-69
      
Installing  
     
-  Using 3360 driver, press new, oiled valve guides 
from camshaft side to collar into cold cylinder 
head. 
     
Note:  
     After valve guide with collar is seated,

Page 46 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-70
      
WARNING! 
     
Valves must not be refaced by cutting or 
grinding. 
     Only hand lapping is permitted.
     
WARNING! 
     Sodium-filled exhaust valves must not be 
scrapped without f

Page 47 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-71
      
Valve seats, refacing
 
     
Note:  
     If a perfect contact pattern isnt obtained after 
hand lapping valves, reface valve seats. 
     
Special tools and equipment  
     
Depth gau

Page 48 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual valve lifter function is no longer guaranteed and 
cylinder head must be replaced. 
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Page 49 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-72
      
Determining maximum allowable refacing 
dimension  
     
-  Insert valve and press tightly against valve 
seat. 
     
Note:  
     If valve is replaced during repair, use new valve 
for

Page 50 of 51

AUDI TT 1996 8N / 1.G AEB ATW Engines Valvetrain Servicing Service Manual 15-73
       Distance measured minus minimum dimension = 
maximum allowable refacing dimension.  
     
Example for outer intake valve:  
   Distance measured   34.4 mm (1.354 
in.)  
-   Minimum dime
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