Dropping oil pan - any other tasks?

[sapest]

FWIW - I found this in a Yamaha Tech Tip - M08-059 - from 2008

CAUTION: _______________________________
When repairing a motorcycle with a clutch that
is slipping or has worn-out friction plates, be
sure to inspect all clutch components and the oil
pump pickup screen. The high heat created by a
slipping clutch can damage the clutch boss,
pressure plate, or basket. Not replacing worn or
damaged components can cause abnormal
operation, and reduce the service life of the
rebuilt clutch. Inspect and, if necessary, clean the
oil pickup screen. A pickup screen plugged with
clutch friction plate material can cause damage
due to lack of oil flow.
If the clutch is damaged, clean the oil pickup
screen!

Anyway - - - - -

-Steve

 

[wfooshee]

I forget where, but somewhere here I saw a photo of the inside of the oil pan. Yes indeed, no baffle, and all but a few drops of oil will drain..... so we can put that to bed. I would say now to the OP, if you didn't see junk in your drained oil, chances are there isn't any to worry about.

Found mine....

This was after removal but before cleaning. Of course, the engine had been sitting inverted for a while waiting for me to start the work, so I couldn't tell you where oil would remain after draining. You can see the drain bolt near the top.

 

[Wemi]

I forget where, but somewhere here I saw a photo of the inside of the oil pan. Yes indeed, no baffle, and all but a few drops of oil will drain..... so we can put that to bed. I would say now to the OP, if you didn't see junk in your drained oil, chances are there isn't any to worry about.

Found mine....

This was after removal but before cleaning. Of course, the engine had been sitting inverted for a while waiting for me to start the work, so I couldn't tell you where oil would remain after draining. You can see the drain bolt near the top.

[img=[URL="https://lh3.googleusercontent.com/-8L2lX4SMN_Q/VA0FXvsiStI/AAAAAAAAOiE/MfSHlFGF3QA/s640-Ic42/20140906_161243.jpg%5D"]https://lh3.googleusercontent.com/-8L2lX4SMN_Q/VA0FXvsiStI/AAAAAAAAOiE/MfSHlFGF3QA/s640-Ic42/20140906_161243.jpg][/URL]

Point of this pic?

Perfectly clean oil pan needlessly removed??

Engine sitting inverted? Did you hang the bike from the ceiling for the winter?

 

[wfooshee]

I was answering the post where someone said they'd seen a pic of the inside of the oil pan. I was pretty sure he was referring to my picture.

That's all. no other point, as far as this thread was concerned.

As for why I removed it, I was replacing my transmission, which made it a needful removal. As for engine being inverted, I'd removed it from the bike, turned it over and started yanking stuff off so I could get to the busted-*** gear shifting things.

 

[sapest]

Had a shop do the work while bike is not in use. Seems cleaning the screen was the right choice.



thanks to all who made helpful comments

-Steve

 

[TomInPA]

Good to get that crap out of the oil Steve. ^like. I think this, and your previous post is enough to end any debate. If the clutch is badly damaged, this need to be done.

 

[HotRodZilla]

Dayum...Who called that one? 'Zilla called that one. Man, sometimes, I'm so smart, I scare myself!

 

[bluesdog]

Dayum...Who called that one? 'Zilla called that one. Man, sometimes, I'm so smart, I scare myself!

Even a broken clock is right twice a day...

 

[Fred W]

OK, so it's good to get that stuff out of there.

But... just for the mental exercise, let's imagine what would have transpired had the spooge been left in there?

I'd wager that it never would have caused any problems at all. It certainly wasn't restricting the oil flow very much, and the screen was doing its job to keep it out of the oil galleys. I'd also guess that all of the smaller particles, of which there surely must have been more of, passed through the screen and ended up in an oil filter.

Thanks for the tip on putting the bike on the side stand when draining the oil. I had been using the center stand. Learn't something today!!

Yeah... I actually measured how much more you could get by tipping it on the sidestand after draining fully on the center stand once. The answer was < 3 oz. (photo evidence below). I don't bother doing that anymore.

 

[hppants]

My "side stand" suggestion was only to use gravity to encourage any material in the sump to get pushed out of the drain plug hole. With only 3 ounces of oil to help, maybe it wouldn't matter much.

In the picture shown, about 30% of the screen is restricted. Would like to have seen the bottom of the pan. Under a vacuum, perhaps more crap would have been pulled into the screen?

I think it's significant, and I agree with Tom - unaccounted clutch material can lead to other issues. Glad the OP followed his gut. I was leaning toward "it ain't broke, don't fix it". But I type corrected.

 

[TomInPA]

Is there anything contradictory about a person who'd "wager" that clutch material would not be harmful, when that same person is anal enough to measure the additional oil that can be drained by tipping the bike on a sidestand...

Methinks that "wager" is not with your own engine Fred.

Just yankin' your chain because we all know you may, or may not give your bike blow-jobs, but you'd be the first one to rip that oil pan off if you even suspected there was contamination in there.

OK, so it's good to get that stuff out of there.
But... just for the mental exercise, let's imagine what would have transpired had the spooge been left in there?

I'd wager that it never would have caused any problems at all. It certainly wasn't restricting the oil flow very much, and the screen was doing its job to keep it out of the oil galleys. I'd also guess that all of the smaller particles, of which there surely must have been more of, passed through the screen and ended up in an oil filter.

 

[sapest]

Hppants -

FWIW the shop reported "serious goop" in the pan itself. No photo. The screen could have been clogged even more, who knows how much falls off the pickup when the bike sits for a while?

Fred W -

If m/c oil fliters are like auto filters, its my understanding that when they clog, there is a bypass, dirty oil being better than none. My concern - what we are looking at is goop after the oil filter reached capacity. No, I dont know what the state of the oil filter was, so its all speculation. I appreciate your comments; I will sleep better knowing the pickup and pan have been cleaned up.

-Steve

 

[Fred W]

Good points for sure.

Yes, the filter is a filter, so there is a bypass mechanism.

As for measuring the additional oil that one can extract by tipping the bike on the side stand, that was more of an "exercise" to demonstrate the futility of the practice than anything else. I never practiced that particular witchcraft, but I thought it funny when other advocated it considering there is almost another quart of dirty oil left after all the draining.

Kind of like the holy grail spline greasing ritual, of which I disproved any need for several years ago. But my efforts have gone unappreciated, accused of being heresy, and generally disdained by FJR Vox Populi. I'm OK with that.

 

[wfooshee]

Hey, I'm with you on the spline greasing! There's almost NO movement in that joint, and the mating parts do not mate-unmate-mate-unmate like gears do. So not only is there a very small amount of movement, there's no banging of parts together.

 

[mcatrophy]

... But my efforts have gone unappreciated, accused of being heresy, and generally disdained by FJR Vox Populi. I'm OK with that.

Story of my life. But we must keep trying, some of our pearls of wisdom may bypass the crap filter and finally do some good.
Of course, most of my pearls are crap.

 

[HotRodZilla]

Dammit...Now I don't remember where Fred stood on the lubed spline issue. With that going on, I don't know whether to ridicule him or give him a big +1. This is SO trying!