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Thread: Corolla KE70 OVERHEATINGG !!!

  1. #1
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    Default Corolla KE70 OVERHEATINGG !!!

    My 1980 Toyota Corolla (KE70) has the standard 4K engine.
    Here is a link to the pic of the engine
    http://2.bp.blogspot.com/_G8Dg1XGzwd...0/100_1956.JPG

    NOTE: The radiator fan which comes in this model is not automatic but instead is connected via a belt which spins based on how fast the engine is running/revving.

    So the problem is that the car overheats with the A/C running. It heats up slowly when the car is moving and heats up quite quickly in traffic jams.
    Also with no AC and the engine running, the temperature needle comes up to almost half when the car is not moving. PLUS THE AC'S COMPRESSOR TURNS ON AND OFF ACCORDING TO THERMOSTAT so even this is no reason for the heat up.

    I got the following things done to control the overheating:
    --A bigger radiator.
    --A bigger radiator fan with 7 blades
    --An extra electric fan (This is in addition to the AC fan)
    --The car is tuned properly
    --The engine oil level is perfect and the oil is relatively new
    --Got double head gaskets installed.
    --Got the radiator completely serviced.

    BUT STILL! THE CAR OVERHEATS WITH THE AC ON, IN TRAFFIC JAMS OR WHEN MOVING SLOW..

    WHAT SHOULD I DO? HELP\

    The car runs on CNG usually by the way


  2. #21
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    Xulfiqar.. The dedicated fan for the ACs condenser is relatively small compared to the condenser. I would say the fan is nearly as half the width of the condenser and is attached to extreme left side of it. Should I get it shifted to the center of the condenser??

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    @ Zuba

    what is electric radiator fan which solved ur issue. i am facing same issue kindly elaborate

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    Xulfiqar. The condenser fan is relatively small. Its about 40% the width of the condenser and is placed on its extreme left. Should I get it relocated to the center of the condenser?

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    Mub123.. I bought one for Rs 800 from Plaza. It was obviously used but relatively silent and fast with good air suction. I got a bracket made for it for about Rs 350. Placed it directly behind the radiator. Wiring+Relay+Labor.

    Total spent approx Rs. 1400

  6. #25
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    condenser fan is usually on left side,but wen ac turns on,condenser fan and radiator fan both work together so no need to move condenser fan.make sure both fans run together when ac is turned on...so wen radiator fan is on,radiator fan will suck in air thru condenser too..make sure there is no way out for radiator fan to suck air thru..make sure radiator fan sucks air thru condenser n not from sides...
    put in some foam,where there is space between condenser n radiator...
    REAL men drive manual cars!

  7. #26
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    the condenser fan should be on the side of the condenser where the compressor discharge pipe connects to, It ensures maximum efficiency, If you solved your problem by adding an electric radiator fan then your original condenser fan is either lazy, badly installed, badly designed or just dead. (not every fan that spins is good)

    A toyota Viscous clutch fan is very effecient and pulls a LOT of air when working, more than both your electric fans will ever pull combined.

    An older style mercedes benz condenser fan in the front of the condenser and a VC fan will be about overshooting by 50% for cooling the little 4K engine, I installed a similar thing in a toyota 2T engine, and had no problems ever, just that when the condenser fan switched to full speed, you could hear it a few thousand feet away.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    I'll get the condenser fan checked and replaced if it is not strong enough. Thank you all for the help

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