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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


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Old 08-30-2013, 02:58 PM   #1
High_240sx
 
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KA Another S14 KA24DE Overheating thread

You know the coolant hose that is toward the back of the motor under the intake manifold? That was leaking so I replaced that along with some other parts. While that hose was leaking though, I used some 'radiator stop-leak' product, and also the temp gauge ran up to the top COOL line, it never got up to the H area... So I've replaced that hose, the water pump, thermostat, radiator cap, and properly bled the system for about 45 min using a Lisle spill-free funnel.

Now the problem is my car will get hot after driving on the highway for about 20-30 minutes. The only thing I can think of now is head gasket or clogged radiator. Turning the heater on brings the temp back down for a good while, and keeping the temperature switch on hot.

Found this quote in another thread:
Quote:
Originally Posted by 1ZlowZ View Post
Turn your car on. and go check if there's pressure on your radiator cap before car warms up.

If it squeezes out air when you're taking it off before it goes up to operating temperature you have a bad head gasket.

Combustion gases are going into your cooling system.
Is this statement accurate? This happens when I start my car for a minute or two so I can pull into my garage to work on it. The rad cap squeezes out a little air. Is my headgasket done? I have absolutely NO other symptoms of headgasket failure.

Thoughts? If I pass a pressure test on the cooling system... clogged radiator from the stop leak?
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