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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-05-2015, 02:30 PM   #1
Honeybadger VS
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Location: Schofield Barracks, Hi
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My Ride: 2000 328Ci
Random overheating problem.

So lady night as I was driving my 00 328ci decides it wants to over heat but shortly the fan goes on full turbo mode and it goes back to normal. I've already replaced the fan before along with most of the coolant system except for the water pump and radiator. I also know I have a small coolant leak from somewhere but haven't found it yet. As it stands right now coolant is full and I'm thinking it's the fan. Thoughts?
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Old 01-05-2015, 03:53 PM   #2
Tangent_
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My first suspect since you have a leak anyway would be that the system needs to be properly bled. An air pocket would definitely cause erratic temperatures.
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Old 01-05-2015, 06:47 PM   #3
Solidjake
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+1 on bleeding, but it makes no sense to do since the air will keep coming in because of the leak depending where it is. Bleed it for now and replace whatever is leaking.
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Old 01-05-2015, 06:51 PM   #4
Honeybadger VS
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I think it's the big rubber hose to the left of the resevoir. Will bleed again. I'm at 92k miles when do you guys think I should do a complete water pump/piping replacement?
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Old 01-05-2015, 08:47 PM   #5
Solidjake
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Do you have any maintenance records for the car to show what was done? If not maybe the cooling system was never touched and at that mileage I'd do a full overhaul minus the radiator. Check out mangos thread in the General E46 section.
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Old 01-05-2015, 08:51 PM   #6
Honeybadger VS
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I have all the records and it's just routine stuff. No coolant work other than what was done before I shipped her to Hawaii which was quite a bit but a few things like the pump and a few of the hoses
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