Hello,
No I haven t checked the CO value, how can I do this?
Changes;
-From blue coolant to red coolant, I mixed some, they dont seem to form sludge.
- Revision of the waterpump, replace gasket and rings etc, also the propeller and propelershaft are replaced.

Ps I foubd some info on thw forum on how to check the CO value I ll try doing this asap!