'94 325i overheating help please:) - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 02-16-2007, 06:18 PM
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'94 325i overheating help please:)

Hi,
I have a 1994 325i and the engine keeps overheating. I have replaced the radiator, expansion tank, expansion tank cap, lower and upper radiator hoses, overflow hose, sensor attached to expansion tank, and thermostat (88 degree). I also use bmw coolant (50/50 combination of water/antifreeze). The only other thing i can think of on the coolant system is the water pump. Could it be anything else? Thanks
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#2 (permalink) Old 02-17-2007, 01:28 AM
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-water pump on a 1994 was not metal it a very good possiblity that its bad.
-also you might have replaced the problem but didnt bleed the system properly leaving an air pocket in the engine.

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#3 (permalink) Old 02-17-2007, 01:53 AM
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Crack in block/head.. too.

But make sure its bled correctly first.

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#4 (permalink) Old 02-17-2007, 10:32 PM
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I had the same problem with my 95 325i and it turned out that I had a bad head gasket. I had a leak down test performed before I started replacing all the parts that you already have completed. Did a mechanic suggest that you replace all those parts? I mean it never hurts to replace a $12 thermostat. Also I guess a minor possibility could be the fan clutch too.

Fuhgettaboutit
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#5 (permalink) Old 02-23-2007, 08:50 AM
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Probably the water pump, I had the same problem with my 94. From what Ive read the water pumps tend to fail sometime after 100,000 miles. I talked to a guy at the BMW dealer near me and he was amazed my car last 140,000 miles before it failed.
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#6 (permalink) Old 02-23-2007, 08:59 PM
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hi..
I got the water pump replaced and it still ran hot. It turns out that it is the cylinder head. I am not going to get it milled / machined. Instead I plan on buying a refurbished or new engine. Does anyone have any advice on the refurbished? I have not obtained a price on refurbished yet, but a new is 7k. Thanks for any advice! =)
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