Oil Cooler info

[Horse]

G,day
Did a search and can't quite seem to find the answer , apologies if it's staring at me, was wondering if anyone has an insight into the failure mechanism of the leaking oil cooler. From what i can glean it splits at the flange if it's going to , is the general consensus that the vibration from a less supported cooler fatigues the joint and it cracks, my bikes done 55000 ks and am trying to do a bit of preventative work, am wondering if supporting the hoses and or cooler a bit differently might get some extra life out of the cooler . The rubbers that mount the cooler seem to be pretty loose and you can lift the cooler a few millimetres.

Any thoughts appreciated,

Horse 

[seth]

my oil cooler failed at the right union flange .
But mine was caused by fitting aftermarket hoses that were much heavier and had a very slight leak (a drop every once in a while)
It finally failed when I tried to tighten it and stop the leak once to often .
I took it to serval places in Germany (where it failed) and back in the uk(scotland) and was told it's to fragile to repair.
A brand new standard cooler was fitted with no problems.
I think the best thing is just clean them and leave well alone .
Emma's bike has just passed 55555 miles last week the cooler is as good as new .

[Horse]

Thanks for the info Seth seems like a bit of a lottery if they fail or not

:twisted:my oil cooler failed at the right union flange .
But mine was caused by fitting aftermarket hoses that were much heavier and had a very slight leak (a drop every once in a while)
It finally failed when I tried to tighten it and stop the leak once to often .
I took it to serval places in Germany (where it failed) and back in the uk(scotland) and was told it's to fragile to repair.
A brand new standard cooler was fitted with no problems.
I think the best thing is just clean them and leave well alone .
Emma's bike has just passed 55555 miles last week the cooler is as good as new .

[Villiam3rd]

Mine looked like this after removing because it leaked,no wonder the o-ring didn't seal properly.

[Andre]

Thanks for the info Seth seems like a bit of a lottery if they fail or not

Seems to me a good assessment.

[seth]

@Villiam3rd
That looks like the hose .
Can you get a new one or have that repaired in your part of the world.
Good luck to you 

[Villiam3rd]

@seth No, that is the cooler and new one is on the way.

[seth]

That'll be why it leaked then I've not seen that before they normally split where the cooler meets the journal when then do go.
Not great having to buy a new cooler but that was never going to be repairable

[Hooli]

Most coolers I've seen fail go on the LH bottom corner (as you sit on the bike) and crack in the 'accordion' style end tanks.

I doubt you can do much about it really. I think the oil flow goes in on the LH side so that corner suffers the most thermal changes, hence it expands & contracts more leading to failure.

I fitted a different design replacement after my 2nd cooler failed & had no more issues since.

[Horse]

Thanks for the reply's, after all that I believe the design is substandard and the combination of loading ,vibration and thermal stress will be the cause.The only variable that I would have much control over is the loading so I might have a play with the hoses ( which seem overkill for the duty) and see if I can unload the cooler a bit. Probably will have no effect but will make me think I have had a go. Will also either replace or bush up the mounting rubbers and then it will probably fail soon thereafter,
Have a good one,
Horse