Question about 1987 Ford Ranger

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Low heat output since I replaced heater core, good compression all cylinders

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Your saying that the heat from the heater core was fine until you replaced it? Now with the new one you fine a reduction in heat?
I would suggest inspecting the hoses. They may be kinked or collapsed internally.
Also see if there is a shut-off valve, If you accidentally left it in the off position then you would get a lack of heat.

Posted on Apr 24, 2010

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