DSG-423 ENGINE
02-17
Valve Seal - Removal
CAUTION: During engine repair procedures,
cleanliness is extremely important. Any foreign
material, including any material created while
cleaning gasket surfaces, that enters the oil
passages, coolant passages or the oil pan can
cause engine failure.
1. Remove camshafts -- Refer to“Camshafts -
Removal” on page 18 of this section.
CAUTION: If the camshafts and valve tappets are to
be reused, mark the location of the valve tappets to
make sure they are assembled in their original
positions.
NOTE: The number on the valve tappets only reflects
the digits that follow the decimal. For example, a tappet
with the number 0.650 has the thickness of 3.650 mm.
2. Remove the valve tappets -- Refer to“Valve Tappet -
Replacement” on page 18 of this section.
3. Remove valve spring assembly -- Refer to“Valve
Spring - Removal” on page 16 of this section.
4. Using special tools 307-005 and 303-468, remove
and discard the valve seal.
Valve Seal - Installation
1. Install the valve stem seal installation sleeve.
2. Using special tool 303-470, install a new valve seal.
3. Install valve spring -- Refer to“Valve Spring -
Installation” on page 16 of this section.
4. Install tappets -- Refer to“Valve Tappet -
Replacement” on page 18 of this section.
CAUTION: If reusing tappets, install in original
locations.
5. Install camshafts -- Refer to“Camshafts -
Installation” on page 18 of this section.
6. Repeat for each cylinder being serviced.
Installation
Sleeve
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