Question about Mitsubishi Colt

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Gents, i have a colt 2800tdi d/c, blew the head gasket, replaced with new head and water pump, however have noticed now that radiator is building pressure and is now overheating, removed thermostat to check, but still doing same thing, shouldn't the engine be running cold now without thermostat instead of overheating, heat guage goes upto 3/4 mark.

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Hi well sorry to say this sounds like you have not cured your head problem, if you feel the top and bottom hoses to the radiator are they rock solid after a short time? if so, this means that the head is still not right and either there is a crack in the block causing it or the cylinder head that you replaced it with needs skimming, this will make no difference removing the thermostat if the head gasket is still not right...hope this helps

Posted on Oct 10, 2010

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Sounds like your car is air bound when cold fill up water replace cap start car squeeze hose that is highest or closer to the hood remove radiator cap look for bubbles do that for about 10 min. at idle replace cap

Posted on Oct 10, 2010

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1. Replace the head gaskets (will need intake manifold gasket as it need to come off for this procedure).

2. Replace thermostat, radiator cap (if radiator is still good)

3. Replace water pump; the water pump may have stopped working (mechanical), which in turn caused the pressure to build an blow the head gasket (the cause of the pump would be a bad thermostat. If the truck was overheating, then the thermostat was bad to begin with, then the pump, then the head gasket, so then the only place left for the water to go is out the exhaust.

Here is a list of replacements:

^ water pump
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**Also check the radiator hoses to ensure they do not have any "bubbles". Hot water over time (with anti-freeze) erodes the inside of the hoses, and begins to "dig" holes and grooves in the hose, which evetually cause leaks. Consider replacing these as well for safe measure.

Please, let me know if you need further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

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