intermitent overheating - Page 2 - Kia Forum
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post #11 of 16 (permalink) Old 02-15-2017, 02:05 PM
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Originally Posted by jdm74 View Post
In idle the problem does not exist, normal temp before/with fans on aprox 200, the hoses seem to be normal, and could not see anything leaking.
Although Ive noticed the bottom of the transmission has also been sprayed with coolant (more than the top, I would say)

The rear heater (at idle) is not blowing really warm air, to me its just normal (non ac caribbean air)
That points to the likelihood of a blown head gasket, under load it leaks combustion gas into the coolant passages.

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Originally Posted by aquanaut20 View Post
Conduct a coolant combustion test, then replace the thermostat if clear..

... Philip


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post #12 of 16 (permalink) Old 02-15-2017, 05:14 PM
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Any chance of getting a pressure tester and checking your cooling system holds pressure? If it holds pressure for a period of time, there are no leaks in the cooling system.
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post #13 of 16 (permalink) Old 02-15-2017, 07:25 PM
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Originally Posted by anjcol View Post
Any chance of getting a pressure tester and checking your cooling system holds pressure? If it holds pressure for a period of time, there are no leaks in the cooling system.
May not be good enough for this issue, does not error at low RPM/pressure, (pressure tester only applies ~15psi) best with a gas tester..

... Philip
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post #14 of 16 (permalink) Old 02-15-2017, 07:28 PM Thread Starter
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BTW Sunday I drove aprox 150 miles back and forth, thru mountains, the temp was normal all the way there and back, Saturday last, its the first time I noticed the overheating, it was aprox 100 miles r/t, but on the way back, temp was normal the whole way.
Commute in the morning is about 15 miles, just a ver moderate hill about 1/4 mile, the rest downhill or flat, although stop and go traffic

Pressure test and combustion check next.
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post #15 of 16 (permalink) Old 02-15-2017, 08:01 PM
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Need to find the LEAK that sent coolant out all over the transmission. AND my guess is huge air pocket trapped in lines to rear heat unit.
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post #16 of 16 (permalink) Old 02-16-2017, 12:22 PM Thread Starter
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Will bleed from heater lines tomorrow and lets see what happens.

Today, lets mess with Pick Up day or walk..
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