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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 05-26-2008, 05:34 AM   #1 (permalink)
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Red face overheating - just to clarify

Hi..first post for me from downunder.

328i cooling system trouble. Symptom: Overheating and gurgling through expansion tank. No heat coming from the heater..both heater hose's hot. Doesn't smoke. Oil is not milky. Fan clutch good. New OEM pump, radiator etc
Replaced the usual and bled system. This has seperate expansion tank and apparently self bleeding...filled it up and watched all bubbles disapper. I still think there is an air lock..hopefully.
I questioned one BMW mechanic - all doom and gloom merchant - He thought there are stripped head bolt threads in the block due to warped head and coolant going into combustion chamber - $5000??

I sure I installed the thermostat in correctly but haven't double checked. Could this cause these symptom's?
I see many other people with many similar problems but with alot of different cause's so can anyone help with this?

Dean
1979 E21 323i 2.7L
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Old 05-26-2008, 06:53 AM   #2 (permalink)
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Sounds like air trapped in the system, keep releasing the bleed screw (black plastic screw just to the right of the expansion tank cap) and topping up the expansion tank.
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Old 05-26-2008, 10:06 AM   #3 (permalink)
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make sure to turn the heater on high while bleeding to open the heater valve, if there's no heat but the heater hoses are hot, could be an issue with your heater core
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Old 05-27-2008, 08:46 PM   #4 (permalink)
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I agree with SHABAB323is. Maybe a clogged up heater core or line/s tht keeps u from being able to bleed your cooling system properly.

you can diagnose yourself by disconnecting heater lines and use compressed air to check whether the core is clear.
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