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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Is the expansion tank hose an issue on 328i?



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      10-28-2019, 07:48 PM   #1
AoS810
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Is the expansion tank hose an issue on 328i?

Hi All,

I'm getting ready to replace the thermostat-to-head coolant hose by following Efthreeoh's DIY (https://www.e90post.com/forums/showthread.php?t=1618232) and I came across two threads from the N54 subforum regarding the plastic hose running across the top of the radiator from the coolant expansion tank that seem to plague the 335i's.

1) https://www.e90post.com/forums/showthread.php?t=935690
2) https://www.e90post.com/forums/showthread.php?t=870353

I was wondering is this an issue as well for the N51/52? I haven't come across a thread yet. I just looked at mine yesterday (2008 at almost 151K miles) and the hose seemed okay, of course I wasn't going to bend it and squeeze it though haha!

Just wanted to get feedback from the community because if I have to drain the coolant to do the aluminum bib replacement I might as well tackle this plastic hose as well.

Thanks,

- James
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      11-06-2019, 02:39 AM   #2
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Yes it is. I just had the pleasure of replacing a cracked radiator. When I popped off the plastic tubing it shattered. Replacement hose is like $40 from BMW so I just cut a piece of 5/16" brake line to 14" and swapped it out. $5 fix and itll never break again.
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      11-07-2019, 11:31 AM   #3
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My replacement expansion tank hose arrives today, it started spitting coolant around last week. Interesting timing, huh?
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      11-07-2019, 01:12 PM   #4
rothwem
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Yeah, mine just cracked off too. The rein version is a lot cheaper than OEM, hopefully it's not complete garbage.
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      11-08-2019, 10:01 AM   #5
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So the idea that I'd quickly replace that little hose while the kids got their bath last night... that went to hell in a handbasket in no time flat. The nipple on the upper radiator hose broke off in my hand before I even knew its hose clamp was loose. Oh well. I've got a whole new upper hose in transit from Amazon and am in a borrowed car for the day.

I remember the "quick" disconnect hoses being a pain in the sack when I replaced the water pump and thermostat in my old X3, and so I was terrified that I'd destroy the neck connector on my radiator when taking this apart; it's made of the same shitty aged plastic as the rest of the system. Thankfully, that was not the case. Whew.
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      11-08-2019, 02:22 PM   #6
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Quote:
Originally Posted by Bufalo View Post
So the idea that I'd quickly replace that little hose while the kids got their bath last night... that went to hell in a handbasket in no time flat. The nipple on the upper radiator hose broke off in my hand before I even knew its hose clamp was loose.
This was a huge concern of mine when debating whether to just replace the middle section with brake line/clamps route or replace the entire hose.. Definitely leaning towards the brake line route so I don't break the upper radiator hose while fiddling with it.
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      11-10-2019, 04:21 PM   #7
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New upper hose arrived yesterday, and everything is back to normal again. Good lukc with simpler fixes, everyone.
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