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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 10-13-2004, 09:34 AM   #1 (permalink)
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Hi guys,

I've got an '88 320i coupe which i just got a few days ago. I got it from a dealer and during the test drive i noticed that the right side and floor of the passanger footwell (left side of car as mine is right hand drive) was a little damp. I didn't pay atention to it as i thought someone must have just had wet shoes. Then i went back to test it the next day and it was even wetter. Anyways, the dealer said he'd fix it before selling me th car (we assumed it was just some rain water comming through the firewall).

However, i had to unscrew the cap off my expansion tank tonight with the engine still hot, as the pressure started to build up when i was unscrewing it, i just saw a whole heap of water gush down the side of the car just behind the front wheel, passanger side. And sure enough, it became wet inside the passanger footwell. I had a look with a torch and it seems that the heating pipes go around that area behind the dashboard so could one of them be leaking? and if so, why doesn't it leak constantly when driving, surely that's when the highest pressure occurs. I'm really in need of some idea, at least how to stop it temporarily if anyone knows what this is or it has happened to them as i've got puddles in my car at the moment. Thanks heaps in advance!
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Old 10-13-2004, 12:53 PM   #2 (permalink)
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pressure test the cooling system...
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Old 10-13-2004, 01:20 PM   #3 (permalink)
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Most likely your heater core needs to be replaced!


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Old 10-13-2004, 03:32 PM   #4 (permalink)
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oh man heater cores suck, the one in my camaro did the exact same thin as yours... While playing with my console i found the heater core behind my stereo in my bmw so thats pretty easy to get to, are they all that easy?
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Old 10-14-2004, 10:16 PM   #5 (permalink)
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Hi guys,

I am pretty sure it is the heater core thing. Last night i had the heating on and it just kept dripping and dripping from the pipes there behind the dashboard. This would also explain why i'm loosing coolant and keep needing to top it up). I rant he heat again on today and sure enough, the same thing happened. But when i put it on cold it stopped. It didn't drip with the A/C on or off so it's just when the heat is on. Is this heater core (btw, i have no idea what it is, sorry) this hard/expensive/time consuming to fix? if anyone knows how to do it or there is a guide on the net somewhere could you please point me in the right direction? Also, if there is anyone in australia tat knows where i could find this part as cheap as possible, please let me know. I live in Melbourne.

Thanks again to everyone who has responded, this community of BM fans is great and very helpful.

Cheers everyone!
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