Forum Discussion

vacuumbed's avatar
vacuumbed
Explorer
Jun 13, 2019

Coolant change on 96 Monaco Exec Cummins M11

Hello everyone,

Has anyone attempted this at home? I changed my coolant filter once, but I have never done the coolant. I am not able to tell what the capacity is or where the drain plug is.

This is a 96 Monaco Executive diesel pusher with the Cummins M11.

Thanks in advance.
Class A
  • wolfe10's avatar
    wolfe10
    Explorer
    Jun 13, 2019
    Not a difficult job. Yes, you do need to determine total system capacity and make sure you have a diesel-compatible coolant.

    If you want the step by step instructions, let us know.
  • tropical36's avatar
    tropical36
    Explorer
    Jun 14, 2019
    vacuumbed wrote:
    Hello everyone,

    Has anyone attempted this at home? I changed my coolant filter once, but I have never done the coolant. I am not able to tell what the capacity is or where the drain plug is.

    This is a 96 Monaco Executive diesel pusher with the Cummins M11.

    Thanks in advance.
    You may have to pull a hose for draining and I only use CAT coolant with mine. Cummins surely has one or compatible, also.
  • vacuumbed's avatar
    vacuumbed
    Explorer
    Aug 15, 2019
    *Update*

    I found the drain plug on the side radiator. It is on the tank closest to the front of the RV.

    I bought Fleetguard coolant. They sold me the blue stuff and said it is okay to mix it with my old green coolant.

About Motorhome Group

38,705 PostsLatest Activity: Jan 14, 2025