08-12-2020, 03:18 PM | #1 |
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Hey guys,
I have been having an issue over the last two years gradually. The water temp starts going past half way mark with the AC on. I have had the car since 2006 and never had this issue. The car has approx 48,000 miles. Temps here are around 115-125f with high humidity. Again never had this issue before. As soon as I turn the ac off the water temps Drop to below half or half in a minute. I have changed or checked the following things: New water pump New thermostat New condenser Radiator is good (checked by swapping with a good rad from another car) Expansion valve for ac changed Drier changed Oil cooler is good Everything is clean too and has been cleaned again. New ignition coils and spark plugs Oil is new Coolant flush has been performed many many times using vacuum method and old Skool with nose up and heating on. No coolant loss Car makes great power. Any other suggestions because the only things I haven't changed are the compressor and evaporator but the ac works perfect and blows cold air no problems. Any advice would be appreciated because I am really frustrated and in just want my car to be back to normal.
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09-01-2020, 11:57 AM | #2 |
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Does the car overheat if the AC is on and you're driving? Or just standing still.
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09-04-2020, 04:16 AM | #3 | |
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So the problem might be solved finally. I'll report back once the parts arrive.
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09-21-2020, 02:24 AM | #4 | ||
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09-21-2020, 05:40 AM | #5 | |||
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03-02-2021, 04:32 AM | #6 |
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Did you ever find the answer to this problem?
My E46 overheats with the AC on too, but goes back to normal once I turn off the AC. Iv changed the Aux fan, fan clutch and fan controller. |
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03-02-2021, 04:33 AM | #7 |
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It was the alternator for me. Once changed everything was fine but I can still not give you a 100% thumbs up as I need to test it in the heat. That'll be May onwards here in Bahrain
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03-23-2021, 10:42 PM | #8 |
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What does "overheat" mean? Your car may not have done that in the past, but a little past middle is normal especially as the car ages. Do you know what the actual temp you're reaching is?
I would also try doing distilled water and Water Wetter. A lot of people including me have have success seeing lower temps.
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03-28-2021, 05:12 PM | #9 | |
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08-05-2021, 11:13 PM | #10 |
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Any update on this? I am having the same issue.
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08-06-2021, 05:19 AM | #11 | |
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08-31-2023, 05:30 PM | #12 |
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Problem solved, it was the alternator. Changed to 140amp X5 alternator and all good even in 125f temps with high humidity.
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