m1152 ecv heater core leaking

[mreuss222]

Morning guys.
I have a m1152 rev/ecv. the heater core is leaking.
I have been searching the web for answers and not coming up with much..
There tons on the old models but not mine.
has anyone just replaced the core?
has anyone found a utube on it or anything like that?
thanks in advance

mark

 

[Mogman]

Have you downloaded and read the appropriate TMs?
The parts TM is nice as it will show an exploded view and the repair TM will give the procedure.
Sorry you may have to do some actual reading rather than just watching a tube video.
All the TMs you need are here for free download.

 

[M1165A1]

Had the same issue on my 1165. If you mean it's the front core that's leaking there's a replacement on ebay.

Radiator Core, Front Evaporator/Heater Case/HMMWV pn#50-00335 | eBay

Radiator Coil Core for the front evaporator.heater case on a HMMWV 11/4ton cap. Part is item #17 on drawing. alumnium and brass construction. radiator core dim. 14.0"LX6.0"WX2.50"/inlet and outlet 2"LX11/8"OD.

www.ebay.com

It will take some work to get that thing in and out and if you disconnect the A/C lines (which you will need to, unless you can find a way to get the old core out without removing the whole front A/C unit) then you need to vacuum and refill the A/C coolant.

 

[Action]

Had the same issue on my 1165. If you mean it's the front core that's leaking there's a replacement on ebay.

Radiator Core, Front Evaporator/Heater Case/HMMWV pn#50-00335 | eBay

Radiator Coil Core for the front evaporator.heater case on a HMMWV 11/4ton cap. Part is item #17 on drawing. alumnium and brass construction. radiator core dim. 14.0"LX6.0"WX2.50"/inlet and outlet 2"LX11/8"OD.

www.ebay.com

It will take some work to get that thing in and out and if you disconnect the A/C lines (which you will need to, unless you can find a way to get the old core out without removing the whole front A/C unit) then you need to vacuum and refill the A/C coolant.

View attachment 870081

That is not the correct heater core for the m1152 / 51 / 65 / 67.

 

[M1165A1]

That is not the correct heater core for the m1152 / 51 / 65 / 67.

When I did the replacement it my HMMWV perfectly and it also checks out as part 19 on Figure 286 of the 24P manual. Can you elaborate more?

btw you can also replace the whole front evaporator unit, it's easier but the evaporator unit is expensive and hard to find.

 

[Action]

When I did the replacement it my HMMWV perfectly and it also checks out as part 19 on Figure 286 of the 24P manual. Can you elaborate more?

btw you can also replace the whole front evaporator unit, it's easier but the evaporator unit is expensive and hard to find.

I told you the correct heater core to use 10 months ago. You acted like I didn't know what I was talking about. The core you just posted above is for the m1114. That is a totally different a/c and heating system.

 

[Action]

This is the correct heater core.

 

[mreuss222]

Had the same issue on my 1165. If you mean it's the front core that's leaking there's a replacement on ebay.

Radiator Core, Front Evaporator/Heater Case/HMMWV pn#50-00335 | eBay

Radiator Coil Core for the front evaporator.heater case on a HMMWV 11/4ton cap. Part is item #17 on drawing. alumnium and brass construction. radiator core dim. 14.0"LX6.0"WX2.50"/inlet and outlet 2"LX11/8"OD.

www.ebay.com

It will take some work to get that thing in and out and if you disconnect the A/C lines (which you will need to, unless you can find a way to get the old core out without removing the whole front A/C unit) then you need to vacuum and refill the A/C coolant.

View attachment 870081

that is not the correct heater core. this is what i have and bought. https://www.ebay.com/itm/233339574643
also you dont have to open the AC lines.
you just take most of the screw out holding the 2 parts together . take off coolant lines by coolant overflow tank. take the unit off the body mount. 2 bolts behind air intake below window. I replaced one with rivnut. then pry open a bit and work it out. I may make a video putting it back together. was pretty simple. the red circle is where mine is leaking.