radiator trouble

[link040188]

i keep filling my rad up with 50/50 and its all disappearing. their are no puddles on the floor under the truck and and the fluid just drains out of the tank even after i top off the rad but its not just leaking out of the reserve tank cuz their are no puddles under the car

 

[JULIUS]

Look around your upper rad. hose,cap,heater hose and look for a white hard crusted substance.If you have it,that's your leak.If not then you might want to have a pressure check done.