1994 sedan deville, engine bay HOT!!
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1994 sedan deville, engine bay HOT!! in Past Cadillac Vehicle Discussion; Sometimes when i open the hood of my car the engine bay is VERY HOT.I understand its an engine and ...
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    rp0420 is offline Cadillac Owners Member
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    1994 sedan deville, engine bay HOT!!

    Sometimes when i open the hood of my car the engine bay is VERY HOT.I understand its an engine and that happens but this seems like too much. It even hurts a little to touch the windsheild washer tank. I get no codes or messages for overheating. no smoke, steam, or other problems id expect from overheating. to make matters worse my a/c seems to blow whatever air is outside. Any suggestions. Thankyou in advance

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    Ranger's Avatar
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    Re: 1994 sedan deville, engine bay HOT!!

    What does the DIC read out for coolant temperature? Any DTC's for low refrigerant? Is the compressor engaging?

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    dirt_cheap_fleetwood's Avatar
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    Re: 1994 sedan deville, engine bay HOT!!

    '94 will not display the coolant temp. That wasn't available across all models until '96.

    As long as the car is not telling you it is overheating, do not worry. These engines run hot to improve fuel economy and emissions. The coolant temp will be anywhere from 215-230 in city driving, so it will be very hot under the hood when you open it.

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    Re: 1994 sedan deville, engine bay HOT!!

    Quote Originally Posted by dirt_cheap_fleetwood View Post
    '94 will not display the coolant temp. That wasn't available across all models until '96.

    As long as the car is not telling you it is overheating, do not worry. These engines run hot to improve fuel economy and emissions. The coolant temp will be anywhere from 215-230 in city driving, so it will be very hot under the hood when you open it.
    There is a thread somewhere on here to "hack" the IPC to read coolant temp, volts and RPM. Did it on my 94, works great with no side effects

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    rp0420 is offline Cadillac Owners Member
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    Re: 1994 sedan deville, engine bay HOT!!

    I have no codes for low refrigerant. So does that mean its definitly something else besides a recharge?Also, i havent physically checked my compressor but im pretty sure i can feel it kick on when i turn on ac.

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    Re: 1994 sedan deville, engine bay HOT!!

    An air mix door not closing would keep the temps warm. You DO have air flow I assume? Are the A/C inlet and outlet pipes cold?

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    rp0420 is offline Cadillac Owners Member
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    Re: 1994 sedan deville, engine bay HOT!!

    yes i do get air flow, where are these pipes? sorry i dont know too much about ac systems

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    Re: 1994 sedan deville, engine bay HOT!!

    Two aluminum pipes on the passengers side of the firewall. The hot ones are the heater core.

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    RobsDeville is offline Cadillac Owners Fanatic
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    Re: 1994 sedan deville, engine bay HOT!!

    do the DIC hack! its quick and its easy.

    its seriously the best thing this forum has ever done for me

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    Re: 1994 sedan deville, engine bay HOT!!

    Wait, how did we go from underhood temps to air conditioning?

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    Re: 1994 sedan deville, engine bay HOT!!

    It was a two parter. See the last sentence of the OP.

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    dirt_cheap_fleetwood's Avatar
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    Re: 1994 sedan deville, engine bay HOT!!

    Ah...

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    rp0420 is offline Cadillac Owners Member
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    Re: 1994 sedan deville, engine bay HOT!!

    update. So i wanted to be sure about the compressor and looked under the hood, it looks like the pulley is spinning but the side of the pump is still staying still, like inside the pulley if you know what i mean, im guessing this is the compressor clutch and it doesnt engage it just sits there wit the ac on, and ichecked my compressor fuse which was good, so do i need to replace the compressor?The tubes felt kinda cool at best but not cold. Also i tried to do a search on how to do the dic hack for 94's but didnt have any luck, does anyone know the title?? or link maybe? Thanks alot

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    Re: 1994 sedan deville, engine bay HOT!!

    Yeah, that's the clutch and when the center is not spinning, it is disengaged. It probably needs a refrigerant top off. The compressor gets disabled when it is low so it does not self destruct. The tubes won't be cold when the compressor is not running. No refrigerant running through them. If it was working, they'd be ice cold and sweating.

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    rp0420 is offline Cadillac Owners Member
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    Re: 1994 sedan deville, engine bay HOT!!

    i hope thats all it is, but dont these cars throw a code for low refrigerant? I'll throw some in saterday. Is it true those recharge kits from pepboys and strausse and stuff hurt the system??

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