Coolant Hose Replacement

jsmclaughlin2 · 11-04-2014, 08:02 AM

So in the middle of replacing my OFH gasket, I had to take off the coolant hose to gain enough access to the bottom bolt to the housing... In the midst of removing it, the flange broke. I soon realized that the hose and flange are all one assembly and connect the engine block to the thermostat. Does anyone know the best way to replace this hose? I've searched the DIY section of all the forums and nobody seems to have replaced it....

Efthreeoh · 11-05-2014, 05:31 AM

I wrote a DIY for the N52 coolant hoses. If you go to realOEM.com it has excellent pictures of all the coolant hoses and there locations and attachment points. I'm not familiar with the N54/N55 to give you much better advice, but the coolant hose that attaches to the OFH runs down the front of the engine to the thermostat on the N52, I think it is the same for the N54/55.

BashShah · 11-05-2014, 06:22 AM

it is the same on N54.
don't know the part number off hand but could call parts dept at dealer to know for sure.

Also, replacing that hose.....it almost a full tstat change.
feel sorry for you.

DN

11-04-2014, 08:02 AM	#1
jsmclaughlin2 New Member 0 Rep 6 Posts Drives: 2007 e90 335i AW Join Date: Jun 2014 Location: Lynchburg, Virginia iTrader: (0)	Coolant Hose Replacement So in the middle of replacing my OFH gasket, I had to take off the coolant hose to gain enough access to the bottom bolt to the housing... In the midst of removing it, the flange broke. I soon realized that the hose and flange are all one assembly and connect the engine block to the thermostat. Does anyone know the best way to replace this hose? I've searched the DIY section of all the forums and nobody seems to have replaced it....
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11-05-2014, 05:31 AM	#2
Efthreeoh General 17281 Rep 18,722 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	I wrote a DIY for the N52 coolant hoses. If you go to realOEM.com it has excellent pictures of all the coolant hoses and there locations and attachment points. I'm not familiar with the N54/N55 to give you much better advice, but the coolant hose that attaches to the OFH runs down the front of the engine to the thermostat on the N52, I think it is the same for the N54/55.
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11-05-2014, 06:22 AM	#3
BashShah Colonel 296 Rep 2,015 Posts Drives: 2012 335i Sedan Join Date: Oct 2012 Location: Vancouver, Canada iTrader: (0)	it is the same on N54. don't know the part number off hand but could call parts dept at dealer to know for sure. Also, replacing that hose.....it almost a full tstat change. feel sorry for you. DN
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