|
|
--- Lehanover@aol.com wrote:
The primary object of cooling the oil is to prevent the movement of the bearing overlay. The soft shiny stuff that turns up in the filter when things go wrong. Lynn E. Hanover
Hi guys, I mostly lurk until I have anything meaningful to add. So much good
detail in these posts. I'm not an engine guy but it surprised me to hear that
engine metals have problems with oil temps which aren't even at 300 degrees. It occurred to me today that another real basis for oil temperature limits
should probably be the breakdown of the engine oil. I googled on this topic
'auto oil breakdown temp' to find discussion on oil temp limits before
breakdown. Many good links to discussion such as this...
http://faq.f650.com/FAQs/AftermarketInstrumentationFAQ.htm
"Max. Temperature:
The gauge is redlined at 240F, which sounds about right to me, for synthetic
oil. Dino oil is best kept below 230F. The best temperature is around 190 to
200F. You want the oil hot enough to cook out any water vapour that builds up
in the crankcase and oil when the engine cools down at night, but not too hot
that the oil will start to "breakdown". Richard #230
You also need to be concerned about engine blow-by and condensation creating
acids in the oil that will attack the bearing materials. Even synthetic oil
will not keep this stuff at bay for too long, under short-haul riding
conditions.
Seeing that my bike's oil will be anywhere from 170 to 245 at full temp,
depending on the weather and conditions, I'm not sure I agree the cooling
system is all that great. running at a good clip in warm weather will usually
get the temp up to 220-225. today, in cool weather, it barely reached 190. but
I've hit 245, and my coolant's always been at the right mix and level. Mark
#403
One of the most interesting thing's I've noted is that I can run forever below
6K with just about any load on any terrain and my temp hovers close to 200?.
The second I go above that, temp starts to climb. Sometimes in the summer with
a full load up to 250? That's another reason I use Synth. The observations I
noted occur regardless of ambient temperature. They just happen quicker. If I
ride close to red line on a 50? day, it still gets up to 240?-250? eventually.
David#476."....
Tom/Denver
I just moved up from Birmingham last month and so have been following the
southern storms with interest. Paul, It was I who sat in Dan's Cozy at SERFI
last year and left my cell phone in it.
__________________________________
Do you Yahoo!?
Yahoo! Mail - 50x more storage than other providers!
http://promotions.yahoo.com/new_mail
|
|