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Offline DavieC

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Oil Cooler Pipe
« on: 19 October, 2020, 06:50:48 PM »
I've dropped the headers out to get them welded.

I have dropped out the radiator but left the oil cooler on. When fitting all back together I noticed that as I moved the cooler to get the headers weaved back in the the left (if sat on the bike) flexi section was twisting slightly as if wanted to kink.

What is inside these flexi sections and will I need to look at replacing this??


Offline tiggersteve

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Re: Oil Cooler Pipe
« Reply #1 on: 19 October, 2020, 09:34:03 PM »
Can't be sure, yea I know fat lot of help but must be rubber hose bit same construction as braided brake lines

Offline indytiger1050

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Re: Oil Cooler Pipe
« Reply #2 on: 20 October, 2020, 05:39:20 AM »
Pictures would help..

Don't forget new crush gaskets for the headers.
Also 3 heat cycles with a nice torque down between each.
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Offline DavieC

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Re: Oil Cooler Pipe
« Reply #3 on: 21 October, 2020, 01:32:13 AM »
Here's a pic of the pipe concerned


Online Sidewinder

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Re: Oil Cooler Pipe
« Reply #4 on: 21 October, 2020, 11:38:58 AM »
Does it leak oil?  Does the oil cooler get hot?  If the 1st is no and the second is yes just leave it alone.

Offline tiggersteve

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Re: Oil Cooler Pipe
« Reply #5 on: 21 October, 2020, 05:22:00 PM »
 :0461:

the braiding has kinked and won't go back but can't see a problem internally,
It will probably pull back into shape a little when fixed back in place

Offline Paul2bikes

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Re: Oil Cooler Pipe
« Reply #6 on: 21 October, 2020, 05:44:36 PM »
If the pipe is kinked, it could reduce flow. Who knows know what it might be like internally. What caused the kink, if it wasn't there previously. Needs further investigation, better be safe than sorry afterwards.
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Offline Woodie

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Re: Oil Cooler Pipe
« Reply #7 on: 24 October, 2020, 10:39:40 AM »
*Originally Posted by Paul2bikes [+]
If the pipe is kinked, it could reduce flow. Who knows know what it might be like internally. What caused the kink, if it wasn't there previously. Needs further investigation, better be safe than sorry afterwards.

ditto on the reduced flow.

I would imagine they kinked from bending under the unsupported weight of the oil cooler.   I must say the non flexible parts look remarkably "Un-Rusty" for OEM pipes.
when I did my Downpipes I replaced mine with a set from Sprint  ( I had spares) .

I'd replace to be safe.
I never touched it, you can't blame me, it went off when I was cleaning it.

Offline Path

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Re: Oil Cooler Pipe
« Reply #8 on: 06 November, 2020, 12:34:04 PM »
A braided oil line has a rubber tube inside.  To the extent the braid has a kink, I suspect the rubber retains its integrity.  If the pressure is high enough that it pops the kink out, great.  If it is not, then the pressure is not high enough for the kink to matter.  Maybe long term the steel strands are twisted enough to allow the rubber hose to blow through...but "I" don't think so. 

I would reuse, run the bike, watch that the oil temp is not hotter than usual, and give the line the occasional check whenever I thought about it (likely never after the first month).   
« Last Edit: 06 November, 2020, 12:38:12 PM by Path »

Offline Path

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Re: Oil Cooler Pipe
« Reply #9 on: 18 November, 2020, 09:48:08 PM »
any update?