Gas in my coolant system

@georgem1234 ,Paul . Probable cause for gas/fuel smell in coolant is a blown intake/cylinder head gasket or crack in engine block or component. This will also let air into cooling system affecting flow causing hot/cold and a lot of time over heating. Have a good local shop do a leak down test of the cooling system to locate the problem, diagnose and estimate repair. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.