Help connecting back coolant hoses

Discussion in 'Mazdaspeed 3 General Discussion' started by Julio Salvatierra, Mar 15, 2023.

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  1. Julio Salvatierra

    Julio Salvatierra Greenie N00B Member

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    Hi guys,

    I am new to owning a ms3. Got it with a blown engine and swapped in another one. Stupid me didnt pay attention to where heater hoses connect to and which one goes to top pipe on firewall and which one goes on the bottom. Does anyone on here have a diagram how these are connected? I have one thats coming from oil filter through a metal pipe and wraps to rear of motor. Another hose is coming from thermostat housing to heater core. Any help is appreciated thanks!
     
  2. jsmith

    jsmith Silver Member

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    What year/gen ms3? Dunno if it matters but just in case. I have a gen 2 so if that's what you have I may be able to help.
     
    jsmith, via a mobile device, Mar 15, 2023
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  3. Cfoldone

    Cfoldone Gold Member

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    07 Gen 1 MZ3 ...
    Lower Hose <Purple line> is connected to metal crossover pipe above transmission bellhousing.
    Upper hose <Green> is connected to the water outlet adapter (has water temp sensor, upper radiator hose and lower nipple is the Green line connection.
    firewallMZ3a.jpg
     
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