nissan gu patrol
Howdy my coolant level always sits on the max in the overflow tank GU TD42T. Last couple of days while checking cold was right near the top. Checked the radiator this morning and couldn't see any coolant in the radiator and overflow tank was chokkas. Had a fair bit of coolant down the inside of the guard etc from overflow. Put a litre of coolant in the radiator and went for a spin. Coolant level back to max in the overflow tank and radiator is full. Any ideas ? Had it hot a couple of times on the beach Sunday say 3/4 on the gauge. Maybe just an airlock ?