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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 06-28-2009, 06:08 PM   #1 (permalink)
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Radiator help, please!!!

Hi forum, I'm having an overheating problem with a 1998 323 convert. Diagnosed the problem as a bad expansion tank, replaced that, now I have a problem with the radiator. The overflow hose that extends from the top of the radiator to the expansion tank, had a leak at the clamp, so I thought. The nipple that the hose slides onto broke, part of it was in the hose, now there's only a little stub coming out of the radiator. Is there a way I can extend it, or would I have to replace the entire radiator. I was able to tighten the clamp onto to the stub enough to get home, I was only a mile at most form home. Thanks for any assistance.
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Old 06-28-2009, 06:30 PM   #2 (permalink)
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Hi forum, I'm having an overheating problem with a 1998 323 convert. Diagnosed the problem as a bad expansion tank, replaced that, now I have a problem with the radiator. The overflow hose that extends from the top of the radiator to the expansion tank, had a leak at the clamp, so I thought. The nipple that the hose slides onto broke, part of it was in the hose, now there's only a little stub coming out of the radiator. Is there a way I can extend it, or would I have to replace the entire radiator. I was able to tighten the clamp onto to the stub enough to get home, I was only a mile at most form home. Thanks for any assistance.
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Probably not, it is a pressurized system.......you might try a threaded tube insert.......try finding something that fits tight & maybe self-threading. If it works, apply some high temp. silicone to the thread.

example:

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Old 06-28-2009, 06:48 PM   #3 (permalink)
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Thanks for the reply, if I can find something like that to fit over the nipple, that may do the trick. If I can't find it locally, I may have to order.
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Old 06-28-2009, 06:52 PM   #4 (permalink)
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Thanks for the reply, if I can find something like that to fit over the nipple, that may do the trick. If I can't find it locally, I may have to order.
I was thinking more like to fit inside the hole of the nipple........ It would be stronger & less likely to break.



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Old 06-28-2009, 06:58 PM   #5 (permalink)
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Thanks for the reply, if I can find something like that to fit over the nipple, that may do the trick. If I can't find it locally, I may have to order.
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Old 06-28-2009, 07:01 PM   #6 (permalink)
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To fit on the inside the diameter may not be large enough and stiffle the flow, that's why I said outside. I'll take another good look at it tomorrow.
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Old 06-28-2009, 09:29 PM   #7 (permalink)
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Just be aware that any fix like that should be considered temporary. The entire radiator should be replaced. Read various posts about the cooling systems. If you want to be on the safe side, water pump should be replaced if it hasn't already been replaced while you are doing the radiator. Of course, then there is the fan, if that goes it will take out the new radiator. Bit of a can of worms you've opened. If you do nothing and it overheats, you can add fixing the warped head to the repair list. But I'm just getting into BMW's I'm just parroting what I have read. I am following this advise however.
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