lower coolant hose n52

ram1boyz · 12-16-2022, 02:42 PM

Hello everyone,

I am trying to replace my lower coolant hose and for some reason I cannot get it to seat properly for the life of me. It was a pain to get this hose off in the first place (perks of bmw plastic) but putting it back on seems to be even harder. Has anyone had this issue before? I’m specifically having trouble with the portion that connects to the radiator. It just won’t sit all the way in no matter how hard I push. The other side sits in great though.

irieite · 12-16-2022, 03:35 PM

Quote:

Originally Posted by ram1boyz

Hello everyone,

I am trying to replace my lower coolant hose and for some reason I cannot get it to seat properly for the life of me. It was a pain to get this hose off in the first place (perks of bmw plastic) but putting it back on seems to be even harder. Has anyone had this issue before? I’m specifically having trouble with the portion that connects to the radiator. It just won’t sit all the way in no matter how hard I push. The other side sits in great though.

I always use a little bit of silicone grease on the o-rings on the inside of the hose fittings to make them slide on easier. I would not recommend forcing it. Especially if you have an older radiator. Make sure all surfaces are clean and free of obstructions.

Suvorovo · 12-17-2022, 05:23 PM

Are you using an aftermarket part? Some brands may have fitment issues.

At least a brand off FCP should be good… Rein or the likes.

nicholas6706 · 12-19-2022, 08:54 PM

Quote:

Originally Posted by Suvorovo

Are you using an aftermarket part? Some brands may have fitment issues.

At least a brand off FCP should be good… Rein or the likes.

Actually seems like the recent batches of rein lower radiator hoses from fcp have had poor fitment. A few other members and myself have run into issues. It's pretty unfortunate since the only other option is the genuine one.

Donethat · 12-20-2022, 03:24 PM

Quote:

Originally Posted by nicholas6706

Actually seems like the recent batches of rein lower radiator hoses from fcp have had poor fitment. A few other members and myself have run into issues. It's pretty unfortunate since the only other option is the genuine one.

I recently did radiator and hoses. I used Rein hoses from fcp and had fitment issues with the lower also, in fact I wasn’t able to use it. Everything else was fine.

smass · 12-20-2022, 06:19 PM

I had the same issue with both my E90 and Audi. Heat up the hose fitting with a heat gun and it will eventually slide on.

StradaRedlands · 12-20-2022, 06:46 PM

I have noticed a spike in negative experiences with Rein plumbing. Probably just a small percentage, but enough of a problem to notice it.

dazeboy79 · 08-23-2023, 04:38 PM

I've also had fitting issues with the lower hose using REIN, I've sent it back and I'm getting the Continental. Good idea using the heat gun, but I'm going to try this first.

chilledn52 · 08-23-2023, 05:18 PM

I just did my radiator replacement and couldn't get the old lower rad hose off, I did use a new CRP Rein hose and had no problems, little silicone and clicked right in. Ive not had any problems with Rein products so far including mickey mouse flange, upper rad hose replaced over 2 years ago which I reused, lug bolts, etc

AWSB328iM · 08-25-2023, 02:33 AM

Just did two cooling systems with Rein hoses from FCP. No issues at all.

markeys · 08-16-2024, 03:25 AM

Reviving this to share my experience with my e90 2006 325i. I tried 3 different hoses.

Rein chr0462 from fcp euro. Didn’t secure to the radiator
OEM part# 17 12 7 531 581, didn’t fit. The groove for the tab on the radiator was about .5 cm too shallow
Rein chr0462 from Autozone fit. Not sure why this rein hose fit and the first one didn’t, may have come from a different batch

12-16-2022, 02:42 PM	#1
ram1boyz Private 33 Rep 50 Posts Drives: Bmw E90 328i Join Date: Feb 2022 Location: California iTrader: (0)	lower coolant hose n52 Hello everyone, I am trying to replace my lower coolant hose and for some reason I cannot get it to seat properly for the life of me. It was a pain to get this hose off in the first place (perks of bmw plastic) but putting it back on seems to be even harder. Has anyone had this issue before? I’m specifically having trouble with the portion that connects to the radiator. It just won’t sit all the way in no matter how hard I push. The other side sits in great though.
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12-17-2022, 05:23 PM	#3
Suvorovo Lieutenant 280 Rep 524 Posts Drives: Creaky e90 330xi 6MT Join Date: Feb 2022 Location: New Jersey iTrader: (0)	Are you using an aftermarket part? Some brands may have fitment issues. At least a brand off FCP should be good… Rein or the likes.
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12-20-2022, 06:19 PM	#6
smass Lieutenant Colonel 409 Rep 1,594 Posts Drives: 06 325i - 10 335i Join Date: Sep 2010 Location: Scottsdale, AZ iTrader: (1) Garage List 2010 E90 335i [0.00] 2016 F15 35i [0.00] 2003 E53 3.0 [0.00] 2006 E90 325i [0.00]	I had the same issue with both my E90 and Audi. Heat up the hose fitting with a heat gun and it will eventually slide on.
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12-20-2022, 06:46 PM	#7
StradaRedlands Brigadier General 6518 Rep 3,897 Posts Drives: 2006 BMW 330i MT Join Date: Dec 2021 Location: SoCal iTrader: (3) Garage List 2006 BMW 330i [8.45] 2009 BMW 328i Touri ... [8.00] 2013 BMW X5 35i [7.80] 2011 BMW 528i [8.70] 2006 Mazda3 [5.50]	I have noticed a spike in negative experiences with Rein plumbing. Probably just a small percentage, but enough of a problem to notice it.
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08-23-2023, 04:38 PM	#8
dazeboy79 Registered 0 Rep 3 Posts Drives: 06 330i Join Date: Aug 2023 Location: US iTrader: (0)	I've also had fitting issues with the lower hose using REIN, I've sent it back and I'm getting the Continental. Good idea using the heat gun, but I'm going to try this first.
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08-23-2023, 05:18 PM	#9
chilledn52 Parts Pro 144 Rep 176 Posts Drives: 2007 BMW 328xi 6MT Join Date: Sep 2022 Location: Alberta iTrader: (0) Garage List 2007 BMW 328xi [10.00]	I just did my radiator replacement and couldn't get the old lower rad hose off, I did use a new CRP Rein hose and had no problems, little silicone and clicked right in. Ive not had any problems with Rein products so far including mickey mouse flange, upper rad hose replaced over 2 years ago which I reused, lug bolts, etc __________________ E90 328xi 6MT \| Intake Scoops \| K&N + Charcoal Filter Delete \| DIY Dinan 3in \| 3.25in + 3.5in piping \| N54 Manifold \| MILVS \| Ceramic Coated Headers \| Secondary Cat Delete \| Xdelete \| 3.91 Diffs \| 22RPD Tune
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08-25-2023, 02:33 AM	#10
AWSB328iM Captain 400 Rep 646 Posts Drives: 2011 E92 328i M-Sport 6MT Join Date: Nov 2016 Location: Memphis, TN iTrader: (0)	Just did two cooling systems with Rein hoses from FCP. No issues at all.
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08-16-2024, 03:25 AM	#11
markeys Private 30 Rep 72 Posts Drives: 2006 325i Join Date: Jan 2018 Location: Los Angeles, CA iTrader: (5)	Reviving this to share my experience with my e90 2006 325i. I tried 3 different hoses. Rein chr0462 from fcp euro. Didn’t secure to the radiator OEM part# 17 12 7 531 581, didn’t fit. The groove for the tab on the radiator was about .5 cm too shallow Rein chr0462 from Autozone fit. Not sure why this rein hose fit and the first one didn’t, may have come from a different batch __________________ Former cars: 2005 Pontiac GTO, 2015 Subaru WRX, 2014 BMW 335i M Sport Current cars: 1985 Pontiac Trans Am (LS swap in progress), 2006 BMW 325i 6speed manual, 2022 Toyota 4Runner
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