OIL Pressure, How much Ya got? - Page 53 - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #521 of 527 Old 10-16-2017, 09:38 AM Thread Starter
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Quote:
Originally Posted by Tom Schmitz View Post
How much engine oil is in circulation when the engine is running?

That is, the sump has 2.5ℓ of oil in it when the engine is stopped and the site glass shows full. When the engine is started the oil in the sight glass drops completely out of sight. That means that at least half a liter is in circulation, but how much more than that? How much remains in the sump?
I think these questions are intended for the general membership to ponder for a bit.

So how about some input guys?
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post #522 of 527 Old 10-17-2017, 08:16 PM Thread Starter
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Quote:
Originally Posted by Tom Schmitz View Post
How much engine oil is in circulation when the engine is running?
ALL of IT.

Tom,
To whom was this post intended? And why?
The general membership seems to be shy with answers today.
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post #523 of 527 Old 10-17-2017, 09:33 PM
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Paul,

It was intended for everyone. There is an amount of oil that is just sufficient to keep oil moving through the engine. Let's say the sump needs to have half a liter just to keep the pickup submerged so the oil pump can draw. And let's say that filling all of the galleries and cavities takes another quarter liter and that there is another quarter liter on its way back to the sump.

In total, one liter.

Any less than that and the oil pressure is going to be intermittent as the pump starves until enough oil refills the sump above the half liter level, then it pumps the sump below a half liter and starves itself again. Rinse, lather, repeat.

The engine is on the verge of oil failure.

The question was meant to spark conversation along those lines.

As I said in my last post, we know that being a half liter low won't hurt anything. @Daniel Kavcak is bringing an abused 1993 KLR back to life and said that he drained only a quart and a half out of it, but he didn't report any head damage.

I wondered what people's thoughts were on how much oil was in circulation (in motion above the sump) at any one time. I can get a set of cases out and measure pretty close how much oil needs to be in the sump to just submerge the pickup.
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post #524 of 527 Old 10-18-2017, 10:00 AM Thread Starter
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You have posted those pics previously. You may wish to edit this post to embed the pic or pics.

http://www.klrforum.com/363002-post17.html

Thank you

Many years back, I drained a mere .5-.7 QT of engine oil from a NY tourist KLR which the bronze bushing on the starter ring gear had seized to the crankshaft. (In 8 years on the KLR forums I've yet to read of another starter ring gear seizure. Before, with or after Exhaust cam bearing damage.)

The top end sounded normal after starter drive was repaired, we did not pull the valve cover, he continued on to MT and PNW with his friend. Being as we never heard back from him, we guess he got Extremely lucky. But we will never know for sure.

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post #525 of 527 Old 10-25-2017, 05:51 AM
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Quote:
Originally Posted by Tom Schmitz View Post
Paul,

It was intended for everyone. There is an amount of oil that is just sufficient to keep oil moving through the engine. Let's say the sump needs to have half a liter just to keep the pickup submerged so the oil pump can draw. And let's say that filling all of the galleries and cavities takes another quarter liter and that there is another quarter liter on its way back to the sump.

In total, one liter.

Any less than that and the oil pressure is going to be intermittent as the pump starves until enough oil refills the sump above the half liter level, then it pumps the sump below a half liter and starves itself again. Rinse, lather, repeat.

The engine is on the verge of oil failure.

The question was meant to spark conversation along those lines.

As I said in my last post, we know that being a half liter low won't hurt anything. @Daniel Kavcak is bringing an abused 1993 KLR back to life and said that he drained only a quart and a half out of it, but he didn't report any head damage.

I wondered what people's thoughts were on how much oil was in circulation (in motion above the sump) at any one time. I can get a set of cases out and measure pretty close how much oil needs to be in the sump to just submerge the pickup.
Thanks @Tom Schmitz for including me in this!
So as of now, I have put around 300 miles on the KLR. I plan on draining it in the next 200 miles to measure how much I'm actually using, if any.
I'm hoping that the last owner may have just been like "Der der der, I'm going to dump some 1:50 (that's gas to oil ratio, because that's what came out when I drained it) in the crankcase and call it a day. Looks good, ship it!"
But these next 200 miles I'm just going to have to guess since the speedo cable or speedo gears decided to die last night.

DO NOT QUESTION IT!
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post #526 of 527 Old 01-03-2018, 04:32 PM Thread Starter
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Over the past 2 years + 1 day there have been an additional 21,316 visits to this thread.
Current total, 81,630.

Sorry that the early pics got Photobombed. I hope the info still helps.

Here is a link to Tom Schmitz's complete write-up of all of our combined work, if you haven't already found it.

Paul Westman's Mods to Fight Oil Burning
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post #527 of 527 Old 01-04-2018, 02:07 PM Thread Starter
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From Post #292, on 11-19-2014.

Quote:
Originally Posted by pdwestman View Post
I'll only suggest, that most of us forum members 'rarely' unsubscribe from a thread, which we feel may not have 'run it's full course'! Ya' never know what new info may pop-up on your screen?

I'm personally 'aiming' for 2.00 mm crankshaft oil control orifice size!
There, I said it!!

Wish me good luck?
Well I never quite got completely down to my target of 2.00mm crankshaft oil control orifice size.

At 2.06mm and a 3000 mile oil analysis, the ppm wear metal numbers had a slight increase.
Even with the slight increase, when divide by the mileage the report was still better than the BSL 2000 mile Universal Averages.

So I could have continued to use the 2.06, but I did reinstall the 2.18mm orifice in November 2017.

ps, Wow, I've spent most of this afternoon skimming and re-reading this thread from post #230 where I left off last night. Other than quoted posts, I don't see any other PhotoBombed pics.

pdwestman
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Last edited by pdwestman; 01-04-2018 at 04:18 PM. Reason: ps added
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