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Why is my engine not warming up
1990 Ford Ranger

Why is my engine not warming up

(1990 Ford Ranger)
Changed the thermostat. Cleared the clog in the heater core and am about to do a flush and fill radiator
Tags: ford, ranger
2 answers & 1 comment
Popular Answer
on January 01, 2019
*WHEN* coolant is flowing through heater core sufficiently - BOTH heater hoses should be as hot as the top radiator hose is - with engine at normal operating temperature.

Until that happens - you won't have heat!
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on January 01, 2019

Assuming the heater isn't getting warm..
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on January 01, 2019
*WHEN* coolant is flowing through heater core sufficiently - BOTH heater hoses should be as hot as the top radiator hose is - with engine at normal operating temperature.

Until that happens - you won't have heat!
Sign in to reply
on January 01, 2019

Assuming the heater isn't getting warm..
on January 01, 2019
I'd be concerned bout an air pocket in the cooling system after the repairs were performed as described. Perhaps attempting to purge air (with a special tool for safety's sake) would be the next best step.
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