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Discussion Starter #1
One is plastic with rivets and the other is just a rubber o-ring. Both came out of the side nearest to the thermostat. Now I have a bad leak right at this location. Where exactly are these pieces supposed to go along this hose? The o-ring seems too large to go anywhere.




Plastic ring with rivets:


Rubber O-ring:


Please help.
 

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First, could you make the pictures a little bigger? LOL

The o-ring goes into the plastic end that doesn't have an o-ring, and the hard plastic thing goes in after it...with thin part of that ring facing out...so that the o-ring is mostly covered by the fatter end of that extra ring.

They might be from different ends...but they will pull off and if you don't have that 'extra' ring after the o-ring, the hose will most likely just squish or push that o-ring around and you won't get a good seal. Clean all fittings up really well first...and use coolant as lubricant (on both sides of the fittings...not for personal use! LOL)

Look in other end of hose(s); they're all pretty much the same...just don't put that hard ring on backwards...you're making a 'ramp' to get hose up and over the o-ring...if that makes sense?

Doug
 

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Discussion Starter #4
First, could you make the pictures a little bigger? LOL

The o-ring goes into the plastic end that doesn't have an o-ring, and the hard plastic thing goes in after it...with thin part of that ring facing out...so that the o-ring is mostly covered by the fatter end of that extra ring.

They might be from different ends...but they will pull off and if you don't have that 'extra' ring after the o-ring, the hose will most likely just squish or push that o-ring around and you won't get a good seal. Clean all fittings up really well first...and use coolant as lubricant (on both sides of the fittings...not for personal use! LOL)

Look in other end of hose(s); they're all pretty much the same...just don't put that hard ring on backwards...you're making a 'ramp' to get hose up and over the o-ring...if that makes sense?

Doug

I must be working with a different rubber o-ring. The o-ring in my picture will not fit into the inlet unless it is warped inward. The diameter of the ring is the same size as the outer diameter of the inlet, see picture below (I've layed the rubber ring on top of hose). I've tried connecting the hose with just the hard plastic ring but of course it's still leaking pretty bad. I'm going to head out to an auto parts store to try and find a generic rubber ring. Any thoughts? Thanks.

 

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I ran into something similar. I'd removed a hose and found that it didn't have that hard ring...and the o-ring, though it had sealed, was stretched out severely.

It may be that you might still get it it and have the hard ring hold it properly in place...and just make sure your missing pieces are from the right part of the hose...and frankly, make sure that there isn't already an o-ring or other ring in there...sometimes people do stupid things (yes, I mean person before you, not you!).

If the hard ring fits in but the o-ring doesn't, use the o-ring from the other end of the hose (assuming you still have that intact...to spec the size o-ring you need...and I know that the dealer doesn't sell these alone...at least not for the hose...and I doubt there's another 0-ring that bmw sells that would fit.

Oh, one final thought...there may be a groove inside the fitting that you missed and if so, the o-ring might not be as bad a fit as you think...and you have already tried adding the spacer after it to see if it holds it in place?

Just make sure when you put it back together, that you add that extra ring in the correct orientation...match the other end of hose.

BTW, if you do find a good replacement from hardware store, would be nice 'for the record' to know what size that is...make sure it's thick enough to protrude above the other ring...and good luck!

Yea, btw, the hard ring won't do anything for sealing...it's just for spacing the fittings together properly...but you figured that out already...should've asked, could've saved you some time. It's a pressure fitting, so need o-ring!

Doug
 

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..............Don't know why I didn't already suggest this, but depending on age of that hose, just buy another one and be done with it. Those parts in my experience of taking these hoses on and off have never fallen out. New hose for the upper I think is like $27 online. Also, did you fully remove the metal clip when you took that hose off, because if those parts are in that hose it would be on the other side of the metal clip if I recall.
 
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