DAMMIT!!!! Steam coming from passenger side floor area - M1151-A1 Turbo

[4x4nutz]

We have been having an issue with steam coming from the passenger side area when ever we are going over 45 50 miles an hour. Does not smell like coolant. Humvee has a non-working A/C unit. Heater and blower still work. Thanx!

Steam coming from passenger side floor area - M1151-A1 Turbo

 

[HoveringHMMWV]

Sounds like a pin hole leak in the heater core somewhere. Bypass the core by connecting a heater hose between the input/output or break out the TM’s for reference in removing/replacing.

 

[4x4nutz]

Thank you for the info! Had an idea that might be the problem...but needed some back.