| Special tools and workshop equipment required |
Note | t
| Do not grind valves. Only seating is permitted. |
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| To repair engines with non leak proof valves, it is not enough grind and/or replace valve seats and valves.Especially in the case of more used engines, it is necessary to check valve guides for wear |
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| Grind valve seats only until tracing is perfect. Before grinding, calculate maximum permissible grinding. If grinding measure is surpassed, hydraulic offsetting of valve space is no longer assured and it will be necessary to replace engine head. |
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