volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Valve Spring > < Valve Seat|Specifications|Page 1607
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NOTE:  Use heavy protective gloves when handling chilled assembly tool.

Insert valve seat in cylinder head 
Operation must be carried out quickly to maintain maximum possible temperature difference between components.

Check that recess in cylinder head is clean.

Use hammer to tap seat fully home in recess.

Valve seat dimensions 
Since seats are not marked dimensions must be measured.

Valve seat 
diameter 

Intake 

Exhaust 

Standard 

35.98-36.14 mm 

32.98-33.14 mm 

(1.4222-1.4228 in) 

(1.3041-1.3047 in)

Oversized

36.48-36.64 mm 

33.48-33.64 mm 

(1.4419-1.4425 in) 

(1.3238-1.3244 in)

 ...............................................................................................................................................................................................................................................  

Valve seats, machining

Machine valve seats to following angles: 
Seating face, intake/exhaust 

45° 

Relief angle, upper 

15° 

Relief angle, lower 

70° 

Valve seat width (a) 
Intake 

1.3-1.9 mm (0.051-0.075 in)

Exhaust 

1.7-2.3 mm (0.067-0.091 in)

NOTE:  Check that milling cutter is clear of combustion chamber walls.

Valve Spring > < Valve Seat|Specifications|Page 1607