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Refurbishing oil cooler lines 14 May 2020 08:55 #825721

  • martin_csr
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Is it possible to refurbish oil cooler lines? New lines for the ZX750 are kind of hard to find, so I was thinking a hydraulic shop might could do the job by removing the original crimp fittings & remove the old flexible section, then crimp new stuff onto the rigid metal tubing. not really asking for myself, but I have been wondering about this. Thanks.

ps: I'm assuming the bolt-on oblong fittings that physically attach the lines to the motorcycle are not available or are not an easily replaceable standard fitting for building all new lines.

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Refurbishing oil cooler lines 14 May 2020 09:46 #825725

  • F64
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You could cut the flexible section out with a pipe cutter.
Put AN fittings on the hard line.
Buy a section of hose with the AN fittings and connect.
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Refurbishing oil cooler lines 14 May 2020 10:36 #825728

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Thanks. Would the 30+ yr old rigid lines be suitable for reuse? I suppose they could undergo some corrosion or embrittlement or something like that.

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Refurbishing oil cooler lines 14 May 2020 11:00 #825731

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Unless you are doing a factory faithful resto I see no point in reusing the old lines. There are tons of braided oil cooler lines you can put together yourself at home with basic tools.
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Refurbishing oil cooler lines 14 May 2020 12:08 #825740

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Martin
It would depend on the condition the pipe was in.
So many variables dictate the usability as the pipe gets older.
You have to be able to flare the cut ends.

Unless you section the old pipe out...
-On the engine side of the hose cut the pipe close to the flange and braze a new section of pipe on.
-The cooler side pipe looks like it's flared. As long as you can match the flare angle you could bend up a new section of pipe there and flare it yourself. Otherwise, do the same as the engine side...braze to a small section of the with the flare.
-Then most of your pipe will be new. You just have to figure out how you want to do the flexible section.
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Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
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Last edit: by F64. Reason: because I'm slow at responding ::)

Refurbishing oil cooler lines 14 May 2020 12:58 #825744

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By DoctoRot: Unless you are doing a factory faithful resto I see no point in reusing the old lines. There are tons of braided oil cooler lines you can put together yourself at home with basic tools.

What about the oblong fittings w the 2 bolt holes that attach the lines to the engine? And what about the rigid lines? I would think they would help the routing.

F64, as for the flaring, I wouldn't do it myself. I was wondering in the topic post if a hydraulic line repair service could refurbish original lines. Someone on another forum asked about replacement lines & I had wondered about it myself, then thought maybe they could be "renewed".

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Refurbishing oil cooler lines 14 May 2020 13:39 #825746

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Take it to the hydraulic shop. They can also pressure test their work.
Plus they let you know if your hard line section is safe.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
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LIC, NY

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Refurbishing oil cooler lines 14 May 2020 18:48 #825774

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I'm not familiar with those particular oil lines and fittings but I would be surprised if you couldn't make something work with aftermarket parts. You can easily pressure test your oil lines at home with some simple fittings. as far or ease of line routing, hard lines may have an advantage there but I think making your own braided lines would be cheaper than a hose shop making you one. the earls oil lines with fittings for my kz1000 were around $100

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