Release 00 - 02/2008
Engine WBE 0701-WBE 0704
pag. 9
Service manual
1. ENGINE BLOCK - External operations
7 - Apply abrasive paste for grinding around the
rim of the valve head (19) and then insert the valve
into its seat.
8 -
Use the special manually operated tool
(22) to grind the seat and rim of the valve.
9 - Remove the valve and use clean petrol to ca-
refully clean all traces of paste or metal residues
from the valve seat and rim.
10 - Check the free length of the spring (2) and
replace the spring of it is less than 28,5 mm.
11 - When mounting:
- carefully clean the valve guides and housings of
any foreign body;
- apply a film of oil on the valve stems before inser
-
ting them in their respective housings;
- ensure the correct position of the inlet valve and
the exhaust valve, marked, respectively, with «IN»
and «EX» on the valve head.
12 - Remount the cylinder head
and fix
the screws to the indicated couple.
13 - The valve clearances must be checked whe-
never the cylinder head is removed and refitted
19
22
2
EX
IN
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