pag. 38
Engine TRE 0701-TRE 0702-TRE 0801
Service manual
10. ENGINE BLOCK – External repairs
11 - Apply abrasive paste for grinding around the
rim of the valve head (27) and then insert the valve
into its seat.
12 -
Use the special manually operated tool
(30) to grind the seat and rim of the valve.
13 - Remove the valve and use clean petrol to
carefully clean all traces of paste or metal residues
from the valve seat and rim.
14 - Check the free length of the spring (26) and
replace the spring of it is less than 37,5 mm.
15 - When mounting:
- carefully clean the valve guides and housings of
any foreign body;
- apply a lm of oil on the valve stems before inser-
ting them in their respective housings;
27
30
26
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