Has anybody replaced / repaired these lines before?

[bmw540san]

RealOEM.com - Online BMW Parts Catalog

Just discovered the small leak on both #1 and #2 where they connect to heat exchanger and I'll investigate more tomorrow.

The best price I can find is about $250 for both but I was wondering if anybody was able to repair these:

What I mean is if there is possibility of replacing the rubber part only (the metal part is not leaking) by acquiring rubber hoses in correct diameter, pressure rating and ATF compatibility and using hydraulic hose shop to make new connectors.

Potentially save $150?


Any suggestions / experiences?

Thanks.

[Crowz]

I never fixed those before. The only I have done to those lines is cut them with bolt cutters when I converted from an automatic to a manual trans. The ends are still on my 323i's radiator I think. Couldn't get them loose.

[80stech]

Mine where leaking and I ordered the special tool to remove them and was going to try replacing o-ring if possible but after wiggling them around, servicing the trans and adding a half bottle of trans conditioner they stopped leaking.

[andrewwynn]

ATF wicks like nothing else. Clean them spotless and wrap some white paper towel on to determine exactly where the leak is . Every BMW I worked on it was an automatic transmission has ATF on those lines. It's like it goes through the rubber. I'm MacGyver solving this type of problem so let's see if we can actually fix it


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[bmw540san]

Originally Posted by Crowz

I never fixed those before. The only I have done to those lines is cut them with bolt cutters when I converted from an automatic to a manual trans. The ends are still on my 323i's radiator I think. Couldn't get them loose.

I see. I believe I have the tool that will fit. It's the one to remove the steering lines from radiator. Thanks.

[bmw540san]

Originally Posted by 80stech

Mine where leaking and I ordered the special tool to remove them and was going to try replacing o-ring if possible but after wiggling them around, servicing the trans and adding a half bottle of trans conditioner they stopped leaking.

Interesting. I'll clean everything today and see what's up. Thanks.

[bmw540san]

Originally Posted by andrewwynn

ATF wicks like nothing else. Clean them spotless and wrap some white paper towel on to determine exactly where the leak is . Every BMW I worked on it was an automatic transmission has ATF on those lines. It's like it goes through the rubber. I'm MacGyver solving this type of problem so let's see if we can actually fix it


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Yes, I'd rather fix it if I can. I'll do some checking today and report back. Thanks.

[AceEngineer]

If you do need to replace the hose assembly, take the existing assembly to a shop that does hydraulic work and they probably can replace just the hose part using the original fittings and new crimp rings. Will be a lot cheaper than the OEM part.

AceEngineer

[80stech]

It would be interesting to see what type of seal is in those connections.

[andrewwynn]

There is a transmission place in my town I bet can fabricate new ends.

I just recently refurbished the end of a pressure washer. I'm betting the connection is similar and uses a pair of o-rings it may be as simple as replacing them.

I've read that people use the ATF cooler lines for refilling the ATF on X5 since they aren't designed for refilling (permanent fill). That said my car is probably due for new ATF being at 160,000. At the least I'm going to pull a sample to check the quality of the fluid.


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