The last time I was doing an oil change, I flipped the (new) reservoir over, I noticed a bit of leakage from the hose at the bottom. The car is losing some coolant, and I suspect the connection might not be that great.

The hose is in good condition, but I'd like to replace the o-ring. I did this on an Audi that has similar connections with the slide-in wire clamp and o-ring type of connection.

Haven't been able to find anything with a search, and I don't want to spend $70 for a hose assembly to replace a $2 o-ring.

Anyone have info or a part number for the o-ring?

thanks,

 

Forgot to mention that I've replaced the heat exchanger seals when I did the turbo oil feed lines recently. This hasn't affected the loss of coolant. I'm putting in maybe a cup or so every few hundred miles, going from near the bottom of the reservoir to the fill line.

 

Whats year 2007 MINI Cooper S ? 11537567849 or part 11537600674

No o-ring on its self, you can match it up to a universal o-ring you could get a local shop, otherwise the parts are below. mine had a little wear on the clip and neck itself on top of the o ring , so i replaced the line. No leaks now.

https://www.northamericanmotoring.co...ant-leaks.html

 

The o-rings and retainer clips are not sold by themselves, only with the complete hose. The hose your referring to also goes to the thermostat and the turbo. For something that takes stress at every oil change by moving the expansion tank it's a poor design for that connection

 

I removed my leaking O-ring saturday and took it to the hardware store where I bought a new one exact correct size - 79 cents!! Perfect fit - it is a standard size any hardware store should have. Re-installed - leak fixed! Beats the heck out of spending $80 at Mini for the hose assembly - and much faster/easier to install also!

 

Glad you found it.

 

Do you know the actual size, part number, or dimension? It would make it easier to go to the store and know what to buy.

Thanks
Tim

 

No I do not... I simply removed the worn O-ring... and took it to hardware store where I matched to a new one. The O ring wears from repeated twisting out of the way during an oil-change. If any of the attached hoses show wear... you may want to replace the whole assembly... mine looked OK except for the O-ring - it has held AOK for more than a year now with no issues... for less than a dollar if that is what's leaking... it is a good first step with nothing to lose.

 

Dropping this here in case it helps someone down the road.

I just replaced this o-ring in my 2008 Mini Cooper S.

The part I used was:
5/8" x 7/8" x 1/8"
#32 O-RING
Larsen Supply part number 02-1470P
UPC 052151250254
Purchased today at Ace Hardware for $0.79 + tax.

It was the closest thing I found to the measurements I had taken of the existing o-ring (before I put the leaky car back together to drive to work).

It's a bit beefier looking than the original. Had I had the original with me I might have found a metric one that was closer in size. This one did fit back in the slot in the elbow with a couple of small screwdrivers and some persuasion.

With a little bit of swimming pool lubricant goo applied to the mating surface on the tank, the elbow slipped back on without too much force.

Time will tell if a general purpose hardware store part holds up under the heat, but it should at least do the job in an emergency.


[Edit 12/22/2019]: apparently, the regular rubber o-ring holds up less than two years. It just started leaking again. This time I installed a 21mm O.D. x 3mm cross section o-ring. Again, in standard black rubber. If I could have found a Viton in the same dimensions I would have used that since that material should stand up to the heat better.

 

Mine has leaked a few drops every time I've changed oil since 2008. It never leaks after I put the reservoir back into it's mounting brackets. I wouldn't worry about it unless its leaking after it's reinstalled in it's location.

 

https://www.lohen.co.uk/shop/gen-2-m...em-pipe-o-ring

 

The proportions for the linked o-ring do not look right to me for the application being discussed in this thread. It may be the one for the water pump to thermostat housing tube that runs along the back of the engine. The pictured o-ring appears to be the right proportions for that tube, if painful memories serve.

 

Yes its a little oring, like the size of pinky ring: Comes on this part from the factory.

 

Is this O-ring available from Pelican Parts or ECS Tunning? If so, what is the part number?

 

Hello,

Just saw this, the main part we found to fit is below, also gets the neck and clip fixed because that part can also be worn/.

https://www.ecstuning.com/Search/Sit...h/11537600674/


That guy above found the o ring , if i find one that's matches here i will post up.

 

I wasn't able to find the correct O-Ring by itself. So I tried this about 10 months ago and so far it's working perfectly.
If you remove the O-Ring and look at the inside, you will see that the ring has a cone shape that fits on to the cone shaped nipple. This is not by design, It's just the result of years of being in this position. This is where mine was leaking.
Solution: turn the O-Ring over so that the small side of the cone (inside of O-Ring) fits onto the large side of the nipple. Sounds too simple, but it's working.