Civic 2005 a little reduce the coolant in radiator

[pwuser159353826714]

My civic 2005 decreasing the coolant in radiator equal to half cup.
No leakage.
The level of coolant is low in the morning and when engine getting hot then i check the level it was full.
Kindly suggest it is normal or any issue.
Note: when i full the radiator in the morning after the ride the coolant again decrease

[dani_kk]

Just monitor the reservoir do not again and again open cap. This is normal behaviour of cooling system bro.

[pwuser150504674948]

There is a slight decrease in coolant in the radiator as a result of hot coolant going into the reservoir and then getting sucked back but its should not be too low.

If you can see the fins of the Radiator when removing the cap or if the Level of coolant is decreasing in the Reservoir then its definitely leaking somewhere.

Also in a 20 years old car in which you have never replaced the hoses they get hard leading to coolant leak under pressure which is sometimes not visible to the eye.