Time to head to local auto parts store - BMW M5 Forum and M6 Forums
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Old 9th June 2019, 04:54 PM Thread Starter
BWM
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Time to head to local auto parts store

https://www.realoem.com/bmw/enUS/sho...diagId=11_2667

#4 in diagram, hose between coolant expansion tank and water pump. It's very small hose with regular clamps but it's almost $70.

Now, I'm all about not skimping on quality and I'm aware that I own sophisticated and complicated German car but with little luck I can easily find similar curved coolant hose in proper diameter and easily save $50+.

I already got coolant expansion tank so when I replaced it I'd rather install fresh rubber hose vs 15+ year old one.

I'm also aware that this hose is not know to go bad but if it does it'll be inconvenient time and place.

It might be "only" $50 but when you own 3 older BMW's there is always some expense.

I'll post my result since I know there are few maniacs here like me.

2003 BMW M5 Blue Water Metallic
VDO oil pressure gauge * ZHP weighed shifter * Euro leather armrest * Spal electric fan * Bilstein B6 (stock springs retained) struts and shocks * Supersprint headers, HJS cats, X pipe, Vibrant Performance resonators, Supersprint Magnum mufflers and all new SS T304 Vibrant Performance mandrel bend tubing.

2003 BMW X5 4.6is Saphire Black Metallic
1997 BMW 528iA Alpine White
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Old 9th June 2019, 04:57 PM
Deepan
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Quote:
Originally Posted by BWM View Post
https://www.realoem.com/bmw/enUS/sho...diagId=11_2667



#4 in diagram, hose between coolant expansion tank and water pump. It's very small hose with regular clamps but it's almost $70.



Now, I'm all about not skimping on quality and I'm aware that I own sophisticated and complicated German car but with little luck I can easily find similar curved coolant hose in proper diameter and easily save $50+.



I already got coolant expansion tank so when I replaced it I'd rather install fresh rubber hose vs 15+ year old one.



I'm also aware that this hose is not know to go bad but if it does it'll be inconvenient time and place.



It might be "only" $50 but when you own 3 older BMW's there is always some expense.



I'll post my result since I know there are few maniacs here like me.


If I'm correct, that one doesn't have the sensor on it, and therefore there's nothing stopping you buying an aftermarket hose (Samco or other generic silicone hose)
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Old 9th June 2019, 05:03 PM Thread Starter
BWM
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Quote:
Originally Posted by Deepan View Post
If I'm correct, that one doesn't have the sensor on it, and therefore there's nothing stopping you buying an aftermarket hose (Samco or other generic silicone hose)
Exactly, I have 2 choices:
Buy one in proper diameter sold by foot and see if bending it won't affect the flow or as original plan, get lucky with one made for whatever brand car.
It's very simple hose:
https://www.ecstuning.com/b-genuine-...e/11531407451/
I suspect low stock or about to go NLA has pushed to price up considerably

2003 BMW M5 Blue Water Metallic
VDO oil pressure gauge * ZHP weighed shifter * Euro leather armrest * Spal electric fan * Bilstein B6 (stock springs retained) struts and shocks * Supersprint headers, HJS cats, X pipe, Vibrant Performance resonators, Supersprint Magnum mufflers and all new SS T304 Vibrant Performance mandrel bend tubing.

2003 BMW X5 4.6is Saphire Black Metallic
1997 BMW 528iA Alpine White
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Old 9th June 2019, 05:07 PM
Deepan
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Quote:
Originally Posted by BWM View Post
Exactly, I have 2 choices:

Buy one in proper diameter sold by foot and see if bending it won't affect the flow or as original plan, get lucky with one made for whatever brand car.

It's very simple hose:

https://www.ecstuning.com/b-genuine-...e/11531407451/

I suspect low stock or about to go NLA has pushed to price up considerably


In my E30 I went with Samco hoses (that's why I mentioned the brand) as they have been proven to have less degradation over time, compared to oem.

I think that as more and more parts go NLA for a 15-20+ year old car would cause the aftermarket price to creep up, especially as people know they're often same/better quality than oem in a lot (not all) of cases.

Best of luck, I shall follow with interest.
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Old 9th June 2019, 07:04 PM Thread Starter
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Quote:
Originally Posted by Deepan View Post
In my E30 I went with Samco hoses (that's why I mentioned the brand) as they have been proven to have less degradation over time, compared to oem.

I think that as more and more parts go NLA for a 15-20+ year old car would cause the aftermarket price to creep up, especially as people know they're often same/better quality than oem in a lot (not all) of cases.

Best of luck, I shall follow with interest.
Thanks.
As time passes the parts availability will slowly decline and become more expensive. This is tiny example and small saving but it all ads up over time. I'll check out the Samco and of course I've heard of them.

2003 BMW M5 Blue Water Metallic
VDO oil pressure gauge * ZHP weighed shifter * Euro leather armrest * Spal electric fan * Bilstein B6 (stock springs retained) struts and shocks * Supersprint headers, HJS cats, X pipe, Vibrant Performance resonators, Supersprint Magnum mufflers and all new SS T304 Vibrant Performance mandrel bend tubing.

2003 BMW X5 4.6is Saphire Black Metallic
1997 BMW 528iA Alpine White
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Old 9th June 2019, 08:50 PM
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I might be missing something, but it doesn't look like Samco makes anything for the m5 (https://www.samcosport.com/wp-conten...A-CARS-BMW.pdf). You'll be able to find something pretty close at the parts store for sure though. Let us know, particularly if they'll tell you what vehicle / interchange its off of.
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Old 10th June 2019, 03:46 PM
Freude_am_Fahren
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Even on ebay you'll find 'plucking the feathered chicken'-prices equal to OE pricing and sometimes even exceeding them! As OP already said, alternatives from other car brands exist, offered at more decent prices like these ones:
https://www.ebay.com/itm/2000-2007-N....c100005.m1851

or from European brands like Citroen and Peugeot:
https://www.ebay.de/itm/Kuhlerschlau...UAAOSwcJ1bEspw

I didn't check diameters. You'll have to do that yourself on the website/ in the parts shop. Here some experiences with cooling hose brands Dayco, Gates and Goodyear can be found:
https://www.bobistheoilguy.com/forum...Number=2960772

Gates is a well known supplier of cooling hoses and (spline) belts. If you buy a non-OE hose, buy one with an inside diameter, fitting the connection at the thermostat housing. By careful heating (only) the hose with a heat gun you can increase its inside diameter on the other side, to fit the larger diameter connection of the radiator.
If you don't like to load the radiator connection itself for this purpose (which is justifiable since there is a chance of braking it when loading it too much, certainly at aged radiators !), simply use a piece of steel tube of similar diameter as the radiator connection in your bench-vise. A piece of broomstick, turned (in a lathe) or filed tapered, also works well for increasing the inside diameter of the hose. Don't bother about bends in the hose too much. The hose will be able to orient itself thanks to its rather small outside diameter. The slight flattening at imposed bends will not be critical since this hose only conducts a return flow from the water pump. Correct me if I'm wrong here ...

Last edited by Freude_am_Fahren; 10th June 2019 at 05:59 PM.
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Old 10th June 2019, 06:29 PM
kiznarsh
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I also replaced that hose during my cooling system refresh but don't remember it costing that much, but prices are definitely rising.


The pork chops I got from eBay are still holding up fine and those alone saved me (and others who've done this) more than $400! Crazy.

'03 M5 | 987.2 Cayman | @kian.ski
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Old Yesterday, 08:01 AM
TheShafro
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Trim it to fit. I use this for my superchargers.

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Old Yesterday, 08:10 AM Thread Starter
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Quote:
Originally Posted by wrparrish View Post
I might be missing something, but it doesn't look like Samco makes anything for the m5 (https://www.samcosport.com/wp-conten...A-CARS-BMW.pdf). You'll be able to find something pretty close at the parts store for sure though. Let us know, particularly if they'll tell you what vehicle / interchange its off of.
Samco was mentioned as potential candidate as random hose due to high quality.
Yes, the plan is to find what fits and update the board.

2003 BMW M5 Blue Water Metallic
VDO oil pressure gauge * ZHP weighed shifter * Euro leather armrest * Spal electric fan * Bilstein B6 (stock springs retained) struts and shocks * Supersprint headers, HJS cats, X pipe, Vibrant Performance resonators, Supersprint Magnum mufflers and all new SS T304 Vibrant Performance mandrel bend tubing.

2003 BMW X5 4.6is Saphire Black Metallic
1997 BMW 528iA Alpine White
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