Coolant Leak

zcp312 · 04-23-2026, 12:24 PM

Got a coolant leak at the track yesterday and wondering if anyone upgraded their tank to the turner or moroso/bimmerworld expansion tanks?

Only saw one post on this from 2023, anyone else think an upgrade is worth it for temp control or the stock one performs fine?

Thanks

amrazM · 04-24-2026, 04:48 AM

stock all the way, the moroso looks incredibly out of place in the engine bay.

Redd · 04-25-2026, 07:27 PM

No issue with the stock one tbh, it lasts a fairly long time for a plastic tank. Just replace the plastic bleed screw with a bronze one.

04-23-2026, 12:24 PM	#1
zcp312 ///M 125 Rep 275 Posts Drives: 2011 E90 M3 Join Date: Oct 2020 Location: Illinois iTrader: (0)	Coolant Leak - reservoir expansion upgrade? Got a coolant leak at the track yesterday and wondering if anyone upgraded their tank to the turner or moroso/bimmerworld expansion tanks? Only saw one post on this from 2023, anyone else think an upgrade is worth it for temp control or the stock one performs fine? Thanks
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04-24-2026, 04:48 AM	#2
amrazM mTekMods 2478 Rep 3,150 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	stock all the way, the moroso looks incredibly out of place in the engine bay. __________________ E90M3 - Satin Black F97 X3M - Brooklyn Grey E39 M5 - Silverstone
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04-25-2026, 07:27 PM	#3
Redd Brigadier General 5039 Rep 4,842 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	No issue with the stock one tbh, it lasts a fairly long time for a plastic tank. Just replace the plastic bleed screw with a bronze one.
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