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> Montero Sport, Lower Radiator Hose Cold, new Thermostat, new radiator cap, gauge in the middle
Sebastian_2010
post Feb 24 2013, 06:53 PM
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Drives: 1998 Mitsubishi Montero Sport



Hey Mitsubishi Forum,

I searched the forum but couldn't find the topic, so here is my problem:

--> it seems my lower radiator hose is too cold.

- I replaced the thermostat and the radiator cap
- I have nice pressure on both hoses
- the upper is hot, the lower is cold, maybe hand-warm
- my gauge is and stays right in the middle
- the heater blows hot air, when I want it
- I used prediluted coolant/water mixture, so I guess, that is ok
- changing the thermostat, I flushed the engine and heater core, no dirt left, I guess...

Even after 12 miles driving the lower hose is [totally] cold.
Is that normal??? Any suggestions?

I wonder if I have to take the [just new] thermostat out again and put in boiling water or replace again...?

Any thoughts and ideas greatly appreciated.
Thanks
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Sebastian_2010
post Feb 26 2013, 03:22 PM
Post #2


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Group: Members
Posts: 47
Joined: 2-June 10
Member No.: 90,101
Status: Offline
Location: Santa Ana, Ca
Drives: 1998 Mitsubishi Montero Sport



Hi all,

nobody has some input on this issue?

- is it either OK or should I be concerned and do something about it.
BTW, I have around 179K on it and I'd like to put some more miles on it, so

your advice is appreciated.
Thank you


QUOTE (Sebastian_2010 @ Feb 24 2013, 06:53 PM) *
Hey Mitsubishi Forum,

I searched the forum but couldn't find the topic, so here is my problem:

--> it seems my lower radiator hose is too cold.

- I replaced the thermostat and the radiator cap
- I have nice pressure on both hoses
- the upper is hot, the lower is cold, maybe hand-warm
- my gauge is and stays right in the middle
- the heater blows hot air, when I want it
- I used prediluted coolant/water mixture, so I guess, that is ok
- changing the thermostat, I flushed the engine and heater core, no dirt left, I guess...

Even after 12 miles driving the lower hose is [totally] cold.
Is that normal??? Any suggestions?

I wonder if I have to take the [just new] thermostat out again and put in boiling water or replace again...?

Any thoughts and ideas greatly appreciated.
Thanks

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Nur Othman
post Apr 2 2013, 07:55 AM
Post #3


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Group: Members
Posts: 161
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Member No.: 29,717
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Location: Malaysia
Drives: 1996 Mitsubishi Pajero V6 3500, 2008 Chevrolet Captiva 2.0 VCDi & 1951 Fiat Topolino 500C



QUOTE (Sebastian_2010 @ Feb 25 2013, 07:53 AM) *
Hey Mitsubishi Forum,

Even after 12 miles driving the lower hose is [totally] cold.
Is that normal??? Any suggestions?

Any thoughts and ideas greatly appreciated.
Thanks


Hi,

I guess, if everything is running fine & well, then there's nothing to worry about.

That said, the laws of convection is always flowing from hot to cold to hot, and hot always rises up and cold flows down. So, of course, the bottom part of the radiator will be cold as cold water is flowing out into the engine block, gets heated up, rises through the circulation ducts and exits the engine at the top hose into the radiator again, which, by now, would be boiling hot. It gets cooled down again through the radiator fins as it flows downwards, and the process if repeated.

I wouldn't worry myself with too much details here as long as the indicator level (temp. gauge) is within a reasonable range (middle or slightly lower). But you should start to inspect your cooling system if it gets way above the mid level.

HTH.
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