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  #1  
Old 01-21-2019, 07:09 AM
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Sellers write up on "O" rings

I've ordered a thermostat for 06...I've had an -on again off again- drip from the ET on 05 and who knows when 04 will "cry" for more attention...my point is that I've just ordered a kit of "O" rings....I found the sellers description "eye opening"...I copied and pasted it....

These are metric o-rings and are of the same dimensions and material as the ones that came from the BMW factory.* The cooling system on the X3 & X5 (and many other BMWs) requires a good deal of maintenance, especially the expansion tank (ET) and thermostat.* In most cases, the o-rings at the connection points will leak after they've been disconnected due to compression set.* During winter, leaks tend to develop during the cool down cycle as the already compressed rubber o-rings contract with lower ambient temperatures.* BMW does not offer o-rings for their press & clip hose connections and most dealerships do not stock the o-ring for the coolant temperature sensor in the lower radiator hose. * But don't waste money buying a new sensor or unnecessarily replacing hose assemblies, all of which can last well beyond 150,000 miles.* I've assembled this kit for working on customers' vehicles because I grew tired of throwing away countless serviceable parts when all that was needed were some fresh o-rings.* **


The complete kit contains 19 to 34 o-rings depending on whether the car is equipped with a manual or an automatic transmission, respectively:


5x o-rings for upper and lower radiator hoses and larger of the*2 o-rings at the bottom of the expansion tank*

5x o-rings for heater & return hose connections and smaller of the*

2x o-rings at the bottom of the expansion tank

*4x o-rings for the heater pipe connections: M54 only (11531435808).

2 to 5 o-rings for the back of the water pump: M62, N62, and N62N (11517507717,*11531710055,*11531710048)

1 or 2 x o-ring(s) for smaller hose at the top of the expansion tank (2 o-rings for N52)

1 x o-ring for coolant temperature sensor in the lower radiator hose (13621743229)

***1x o-ring for coolant bleeder screw

**3 x o-rings for automatic transmission heat exchanger circuit: X3 e83 (17111711987)*

1 x o-ring (11532248435) for all diesel powered vehicles equipped with the M57, M57N or M57N2

***X3 & X5 M54 General Information: If you're replacing the ET, new o-rings are already installed for the bottom connections. *You'll likely only need 2 or 3 of these o-rings for the heater & return hose connections to the ET and ET mounting plate.* Spares can be used to replace the o-rings on the ET cap.* However, if you're also replacing the cap, I recommend going with a 1.4 Bar cap (BMW Part# 17111742232) used in almost all newer (and older) BMWs in lieu of the 2.0 Bar cap.


**I would also suggest you order a new coolant bleeder screw (BMW Part #17111712788). Over time, the heads have a tendency to shear off due to heat fatigue.* I've seen this happen on quite a few vehicles, and this precaution can save you a good deal of time and aggravation, not to mention money.* Keep the old one in your glove compartment as a spare. Use a large Phillips screwdriver for these plastic screws, and do not over tighten.* Finally, do not overfill your cooling system as this will prevent the cap from venting excess pressure.* After bleeding the system, siphon out excess coolant until the level is at the upper mark.* Top up as needed after each of the first couple heating and cooling cycles. *

*

Use silicone grease, available at any hardware or plumbing supply store, to install your o-rings, particularly the temperature sensor o-ring.* This will prevent kinking or damaging the o-rings during installation and ease future removal.* Do not use petroleum based lubricants as they will degrade the coolant hoses and plastics in the cooling system. *


X5 Heat Exchanger*Specifics*:*


On cars with automatic transmissions, the heat exchanger adds weight and stress to the mounting plate, where all the connections around the bottom of the expansion tank have more of a tendency to leak.**


E53 with M62 (4.4L & 4.6L) & N62 (4.4L, 4.6L, & 4.8L) engines require 2 x-rings (BMW Part # 17101439140)*for the heat exchanger to mounting bracket connections and 2 x x-rings (BMW Part #*17101439139)*for the transmission thermostat connections to the mounting plate.* These are not included in the kit.**


X5 3.0i *(M54) owners will need to order 2x x-rings for the heat exchanger (BMW Part # 17101439140) to mounting plate connection, which are not inlcuded in the kit.**


The photo in this listing is generic.* Our kits contain between 19 and 34 o-rings depending on application.



06 X3 199k
05 X3 181k
04 X3 162k
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  #2  
Old 01-23-2019, 06:32 AM
RED_5 RED_5 is offline
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Great info! I believe this is my problem.
Is there a diagram to show where these 0-rings go?
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Old 01-23-2019, 06:42 AM
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Originally Posted by RED_5 View Post
Great info! I believe this is my problem.
Is there a diagram to show where these 0-rings go?
I understand in the reading the seller listed the kit (according the car model) and where the ring location is to be placed.

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Old 01-23-2019, 07:43 AM
DangermouseX3 DangermouseX3 is offline
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I just ordered this kit and it arrives in a jiffy bag containing loose O-rings. No specific clues as to what goes where.

Though for everyone I took off my car (when changing the radiator), there was a corresponding new one in the jiffy bag.

Having said that, my new hoses came with the O rings pre-installed
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Old 01-23-2019, 08:09 AM
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Originally Posted by DangermouseX3 View Post
I just ordered this kit and it arrives in a jiffy bag containing loose O-rings.

Though for everyone I took off my car (when changing the radiator), there was a corresponding new one in the jiffy bag.
"Jiffy bag".... ...
did you use them?
did the rings work?
did you return them?
are you saying rings were missing? wth...


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Old 01-23-2019, 09:06 AM
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sounds legit. I wish I would have seen that ad before I replaced all my nuts and berries around the ET last year. Im still tempted to dip the entire tank in Flex Seal and put metal bands around the entire thing ....then encase that in liquid metal and cool then do the whole process over again 3 times.(kidding....maybe...because it will still leak at some point ). When I was a kid I remember my dad had a 70 something Nova SS, red with the black stripe with a bench front seat. Bad azz car and already a classic in the mid 80s when I was about 5. I remember seeing green stains on the driveway. Am I losing my mind or were cooling systems designed to "give a little" and bubble over or leak a bit? Isnt it supposed to be under pressure to a point but the release at a threshold to protect the system? When the system "cracks or gives" before the tolerance of the pressure release or whatever, that seems like a bad design. The ET has got to be in the top 5 common issues with Xs,
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Old 01-23-2019, 09:18 AM
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Originally Posted by 44 Cents View Post
sounds legit. I wish I would have seen that ad before I replaced all my nuts and berries around the ET last year. Im still tempted to dip the entire tank in Flex Seal and put metal bands around the entire thing ....then encase that in liquid metal and cool then do the whole process over again 3 times.(kidding....maybe...because it will still leak at some point ). When I was a kid I remember my dad had a 70 something Nova SS, red with the black stripe with a bench front seat. Bad azz car and already a classic in the mid 80s when I was about 5. I remember seeing green stains on the driveway. Am I losing my mind or were cooling systems designed to "give a little" and bubble over or leak a bit? Isnt it supposed to be under pressure to a point but the release at a threshold to protect the system? When the system "cracks or gives" before the tolerance of the pressure release or whatever, that seems like a bad design. The ET has got to be in the top 5 common issues with Xs,
You're totally right! I've thought about the flex seal too! When I said I rigged it
(see...https://www.bimmerfest.com/forums/sh...php?p=11452185 ) two summers ago...I used the silicone for all the connections with the old rings....let it dry for a day then added the coolant....it worked as planned for a couple of months and still does mostly except for the pressure the ET experiences every drive; and the result is the current periodic drips from Time to time...so now maybe I'll use new rings with the sealant.

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Old 01-23-2019, 09:44 AM
DangermouseX3 DangermouseX3 is offline
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Quote:
Originally Posted by BimmurBrothor View Post
"Jiffy bag".... ...
did you use them?
did the rings work?
did you return them?
are you saying rings were missing? wth...


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Yes, I used some, for hoses that I wasn't replacing. they worked, in that they fitted and aren't leaking.

They sent rings for the entire cooling system, apparently, but I didn't cross check to confirm, but there were plenty in the bag along with a little note reminding me to put a silicone based grease on them rather than petroluem based one. Which I ignored and used antifreeze instead
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Old 01-23-2019, 12:14 PM
tsuintx tsuintx is offline
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While o-rings can seal leaks here and there, people (at least newbies reading this thread) do need to be cognizant of the fact that the coolant system does need a refresh every 80K miles or 3-4 years just to be on the safe side. That's just the way these damn things are...
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Old 01-28-2019, 10:01 AM
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Keep the coolant at a proper level (don't overfill), install a lower pressure cap, drain and fill the system every few years, and don't use garbage parts from eBay/Amazon/[insert name] Auto parts store, and you'll go well over 100k without an issue. IIRC some 'festers have gone almost 200k on original components.
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Old 02-03-2019, 02:09 AM
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Thanks everyone for the replys...this thing has got me going! Just when I'm ready to pounce on the job....it stops leaking. So now I'm thinking it's not seated totally: I removed the wire clip... hood opened...stood on a chair and leaned over on the ET and bounced with all my 275lb...replaced the wire clip. We'll monitor for the next week...thanks again guys***128517;

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Old 02-08-2019, 03:32 PM
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Well "O" rings installed went for a 11 mile freeway gas run...Coolant light came on once on the way to the station...none on the way back! Got up to a quick 100...no problems. Took a nap (pollen is heavy out there) I'll check when the wife gets home

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Old 02-08-2019, 03:34 PM
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Double post
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Old 02-08-2019, 03:37 PM
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So far, so good

Click image for larger version

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Old 02-09-2019, 03:29 AM
Rustynuts Rustynuts is offline
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I've ordered a couple of these sets and they work fine. Almost cheaper than sourcing and buying a single o-ring, esp. when you don't always have the exact specs. I buy a set for a specific use, then lose the rest of the bag, order another set as needed.
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Old 02-13-2019, 04:31 PM
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No problems here...rings are holding steady and no leakage to be found! Going to by another ring set.

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Old 02-13-2019, 06:54 PM
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Where did you buy these O rings?
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Old 02-15-2019, 03:17 AM
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[QUOTE=kind16;12908637]Where did you buy this

Go to Ebay and search this #...321265288203
and there you go!
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Old 11-12-2019, 07:05 AM
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I've had these O-rings for a while and decided to put them in yesterday. I had a problem getting them to seal on the top hose. I used the bigger rings but I couldn't push it tight enough to get the clip to secure.
Anyone else have this problem? I didn't try any other areas. I wanted to check and make sure I'm doing it right.
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Old 11-12-2019, 08:23 AM
abscate abscate is offline
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"Bad design" _ phrase used by people who 95% of the time have never designed anything, to account for the fact that they bought a knackered out old car loaded with Walmart parts and now have to replace something

Sorry for my morning cup of hyperbole
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Old 11-12-2019, 09:09 AM
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I use a little silicone grease on the orings. I've used several of these and not had a problem.

AM.
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Old 11-13-2019, 05:50 AM
RED_5 RED_5 is offline
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I tried that. The bigger rings are for the top hose correct? One goes on the side by the expansion tank and a smaller one to the ET. And another big one on the other end?
I just couldn't get them all the way on after.
Am I doing something wrong?
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Old 11-13-2019, 04:00 PM
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Originally Posted by RED_5 View Post
I tried that. The bigger rings are for the top hose correct? One goes on the side by the expansion tank and a smaller one to the ET. And another big one on the other end?

I just couldn't get them all the way on after.

Am I doing something wrong?
Just reading this...I don't understand ?

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Old 11-14-2019, 06:44 AM
RED_5 RED_5 is offline
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That is a little confusing. I will get pics.

After looking last night the top hose doesn't seem to be the problem. It looks like it's coming from the hose at the bottom, connected to the expansion tank.
This only leaks when it gets really cold, which we are experiencing now in upstate NY. Doesn't leak any other time so I know it's not a broken expansion tank.
I now feel I need to remove the expansion tank and try to get one of these gaskets into that connection to stop the leak.
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Old 11-20-2019, 10:25 PM
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Very likely...I once jacked the car up applied the park break while car was on Jack stands got under the thing while on my back and figured out where the trickle was coming from...a slow, slow trickle...but I got it! My account of the experience is attached to this thread somewhere...Good luck!

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