Civic L4-1.7L CNG (2003)
Coolant: Testing and Inspection
Check
1. Look at the coolant level in the coolant reservoir. Make sure it is between the MAX (A) and MIN mark (B).
2. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it up to the MAX mark, and inspect the cooling
system for leaks.