Reply With QuoteIf by extended period of time you mean years, then yes, however if you think oil residue evaporates in a 4 month winter storage, then no.Originally Posted by 01cbr
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5 - run engine until oil lamp is off and check level
If by extended period of time you mean years, then yes, however if you think oil residue evaporates in a 4 month winter storage, then no.
Last edited by Gnu; 12-04-2010 at 11:32 AM.
A lot of factors come in to play besides time period.
But those parts that bath in oil are better off that way than not. Even for only 4 months.
BS. Do you know what a dry sump is? Do you think BMW bikes are gonna be damaged by not riding them for 4 months, because there is no oil bath in the engine?
Yes I do.
I also know BMW's are designed that way, those with wet sump are not.
Is damaged guaranteed? No.
My only point is bathing in oil prevents corrosion better than not bathing in oil.
I have an engine open right now. Hasnt ran in about 8 months. Cylinder walls have rust. Bet it wouldnt be there if they sat in a pale of oil.
BTW, I have a bit of machining experience. Made parts for air bus and others. I have had less important machining projects gain substantial corrosion over one evening in the trunk of my car on a cold night.
Last edited by 01cbr; 12-04-2010 at 09:26 PM.
Do you really think that dry-sump engines are completely dry? There is usually about 1/2 a liter left in the sump at any time. It is not all removed unless you take the drain plug out of the crankcase. And yes, even a dry-sump engine has a crankcase drain plug. This is enough to provide some protection over the winter.
Of course I know that, because I always change oil myself. You're right, there is still about half litre of oil in the sump, but you can hardly call it a bath
My lawn mower is wet sump. My generator isn't.
Is this a trick question?
No, but your answer might be.
I don't think you know what wet sump is. They haven't made a wet sump motorcycle since... hmmmm... maybe the twenties.
Wet sump is when the bottom end gets oil by spashing or dipping the crank, or in the case of my lawn mower a spoon mounted on the end of the crank, into the oil in the pan.
Everything now is semi-dry or dry sump. A Norton or Harley is dry sump, a Honda is semi-dry sump.
If it has an oil pump, it is not wet sump.
I figured thats where you were going with this.
By wet sump I was referring to an engine with an oil pan rather than oil tank. I may have used "wet sump" incorrectly but its a definition widely used to describe an engine with an oil pickup in the oil pan.
By wet sump I was referring to an engine with an oil pan rather than oil tank. I may have used "wet sump" incorrectly but its a definition widely used to describe an engine with an oil pickup in the oil pan.[/QUOTE]
No , you've used the term correctly. Wet sump refers to an engine that stores its oil in the crankcase, with the crankshaft spinning in that pool of oil. What bitzz is referring to is called "splash lubrication", which is a wet-sump engine without an oil pump, and depends on 'slingers" on the crankshaft to splash oil around to where it is needed. Most bikes use a wet sump, with an oil pump to circulate the oil. A "semi-dry" sump is an engine that uses a crankcase with a separate oil cavity instead of an outside oil tank to hold most of the oil.
The crankshaft does not spin(or sit in ) in a pool of oil, the crank and bearings are well above the oil level in the pan.
[QUOTE=RonnieRev;1455081]The crankshaft does not spin(or sit in ) in a pool of oil, the crank and bearings are well above the oil level in the pan.[/QUO
You are correct, providing the bike is sitting level. Engines are designed so that the crank has as liitle contact with the oil pool as possible. However, when it is off level, which a bike often is, the crank is often in a puddle at one end or the other. l should have worded it better.
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