Why would someone design an oil cooled engine where all the oil doesn't go thru the oil cooler?

I'd like to see diagram of the oil circuit, I'm just not buying it. I mean how is the oil separated so that some goes to the cooler and some doesn't AND how does it remain separate once it goes back into the pan? Once it's back in the pan how is it a lock that the previously "diverted" oil gets "diverted" again. I'm not here to argue but to say that some of the oil NEVER makes it to the oil cooler based on a diversionary valve is at the least a stretch given that it's all recirculated back to the pan and starts the circuit all over again. I mean it's 50/50 right? So every second trip some of that oil is going through the oil cooler. If there's no way to separate the previously diverted oil and divert it again then ALL the oil eventually goes thru the oil cooler as lp pointed out.

Sometimes it pays to have a simple mind.

 

Did you figure out how the oil is metered between the engine and the oil cooler / cylinder heads? I've been through the parts lists and it looks like the fitting that feeds the oil cooler might be the location.

Currently, the on line parts manuals don't show the fitting..

 

I was bored, so for Nomadmax, ask and you shall receive:

Here is a pic of the "oil cooling circuit" in the oil cooled engines.

The oil has two paths at the end of the oil pump. One goes to the cooler, then the heads, and then back to the pan as shown in this pic. The other path, not highlighted here, goes to the filter and through the engine before going back to the pan... as Steve pointed out.

Note that the "oil cooling circuit" does not show any oil going to the engine. At the very beginning of the blue arrows, as they leave the case... you can see where oil also leaves from the same point, but goes to the oil filter. You have to look close to see the oil gallery leading to the filter, because none of that portion is highlighted in this pic

 

Thanks Hatt !

As I was saying above; how does that system divert the previously diverted oil so that it doesn't go through the oil cooler?

It doesn't do that; ALL the oil in the circuit eventually goes thru the oil cooler. It just takes more than one circuit to do so. The system splits the two functions, lubrication and cooling.

 

Steve Cole,

What company do you work for or own?

 

This is all I was saying. There are not two separate oil systems. It's one system with two paths. Unlike the water system which is obviously truly separate. Cause you can't mix oil and water.

EITMS got brought into the conversation somehow, but the stats are little wrong.
On Twin Cams, twin-cooled and all other bikes with fairings - EITMS is activated at 80 degrees ambient.
Road kings at 165 head temp or whatever. Since 2014 anyway.
So if 90 degrees ambient is accurate for the M8 fairing bikes that means HD actually raised the temp from 80 degrees which I guess is opposite to some of the notions made in posts above.

 

After reading all posts I'm more confused now than ever.

But anyway, after watching the video I mentioned, I was under the impression that both the new M8 series had a NEW oil cooling system that is more efficient. And the 114 has a new water cooling system in addition.

That is the insinuation the guy on the video made.

 

OK... I get what you are saying now.....

Since all oil starts and finishes in the pan, yeah, eventually all oil molecules will end up going through the cooler...

I thought you felt all oil went through the cooler before going on it's different paths...

 

Yes sir, we're on the same beam now.

 

I asked him the same question, no response. He keeps talking about developing 117" and 120" kits. I'd like to know more. I see no way to send a private message to him either.