overheating ka24de only with a/c on

Information on the naturally-aspirated KA24E and KA24DE engines.
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af4071
Posts: 15
Joined: Mon Feb 11, 2008 4:02 pm
Car: 92 s13 hatch ka-t powered!!

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The engine overheats when A/C is on. This is something very recent. My car has never done this before and the ac has being working fine for the past year.

The following are my diagnostics: - It overheats only when AC is on, and backs down when AC is off probably means that thermostat is working properly.- The coolant is full. Took radiator cap off (when cold) and started the car, and there is coolant is flowing so water pump seems ok.- The belts, and hoses seems o.k.- I did not notice significant leaks in the coolant.- Condenser fan is working and the clutch fan is working too.- There seems to be no debris blocking the radiator and condenser

This is very annoying so please help.


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USMCgetsome
Posts: 2030
Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
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there is a fan for your a/c condenser. Your idle should raise up to 1200rpm and that fan kicks in to keep your temps stable. Check it! when you have a/c on and then off.

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af4071
Posts: 15
Joined: Mon Feb 11, 2008 4:02 pm
Car: 92 s13 hatch ka-t powered!!

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The rpms go up and the condenser fan comes on and is working fine. Maybe its the condenser or radiator itself?


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