Forums
New posts
Search forums
Members
Current visitors
New profile posts
Search profile posts
What's new
New posts
New profile posts
Latest activity
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Everything Dirt Bike
General Dirt Bike
Oil Sight Glass?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="ossagp" data-source="post: 175155" data-attributes="member: 1650"><p>Molecules and atoms typically expand when they get hotter, they end up with more space (not less) withing themselves. So the density ends up dropping. Air molecules get denser when it gets warmer? They don't do they? Some compounds like water grow again when the temperature drops to the point of crystalization. Ice is lighter than water for that reason, and floats on it's mother substance.</p><p></p><p>Oil isn't thicker as it get hotter. Oil won"t gain the volume mentioned other than gases expanding within them, something modern oils do scant little of and less yet after being heated a few times to evaporating off any thing that boils at a low temp. In the case of multiple viscosity oils like a 15-40, they have an additive package that lets the pour like a 15 weight oil at a cold temp, and don't THIN out any further than the stated 40 straight weight would at higher temperatures. </p><p></p><p>If heat expansion was the reason for what is a pretty drastic change in volume I think anyone would have noticed it in the other applications. I think I am just missing something about what holds the oil in the sight glass area on the RFS engine.</p></blockquote><p></p>
[QUOTE="ossagp, post: 175155, member: 1650"] Molecules and atoms typically expand when they get hotter, they end up with more space (not less) withing themselves. So the density ends up dropping. Air molecules get denser when it gets warmer? They don't do they? Some compounds like water grow again when the temperature drops to the point of crystalization. Ice is lighter than water for that reason, and floats on it's mother substance. Oil isn't thicker as it get hotter. Oil won"t gain the volume mentioned other than gases expanding within them, something modern oils do scant little of and less yet after being heated a few times to evaporating off any thing that boils at a low temp. In the case of multiple viscosity oils like a 15-40, they have an additive package that lets the pour like a 15 weight oil at a cold temp, and don't THIN out any further than the stated 40 straight weight would at higher temperatures. If heat expansion was the reason for what is a pretty drastic change in volume I think anyone would have noticed it in the other applications. I think I am just missing something about what holds the oil in the sight glass area on the RFS engine. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Everything Dirt Bike
General Dirt Bike
Oil Sight Glass?
Top