Oil Bypass Spring

[rule62]

Looking at it more closely, I believe the diverter is there initially to route oil through the cooler lines to the cooler. Without the spring, oil would simply run through the filter and then back through the engine.

The design of the spring seems to have a secondary function. If the oil pressure gets too high (symptom of a blocked cooler) the spring flexes and allows oil to run directly through the filter (as if the diverter wasn't there).

[TitanMonsterS4R]

Please. 

testing now

[TitanMonsterS4R]

let it run for about 10 minutes.  Engine got to 136 degrees the oil cooler went from a cool touch to much warmer when the bike started running? 

thoughts?

[ducpainter]

let it run for about 10 minutes.  Engine got to 136 degrees the oil cooler went from a cool touch to much warmer when the bike started running? 

thoughts?

136 F or C?

[TitanMonsterS4R]

136 F or C?

F

[ducpainter]

F

If the cooler got warmer I'd say oil was flowing.

Let us know what you feel when you ride the bike and it comes up to full operating temp.

[TitanMonsterS4R]

If the cooler got warmer I'd say oil was flowing.

Let us know what you feel when you ride the bike and it comes up to full operating temp.

My daily commute is 40 minutes.  With fresh oil, is there anything I should be looking for from the engine, sounds, etc.  Still trying to understand the purpose of this spring now....

[ducpainter]

My daily commute is 40 minutes.  With fresh oil, is there anything I should be looking for from the engine, sounds, etc.  Still trying to understand the purpose of this spring now....

The cooler should be roughly the same temp as the engine after 40 mins.

I doubt you'll notice anything odd.

I have a good friend that has been a Duc tech for roughly 15 years.

I'll ask him whazzup.

[TitanMonsterS4R]

The cooler should be roughly the same temp as the engine after 40 mins.

I doubt you'll notice anything odd.

I have a good friend that has been a Duc tech for roughly 15 years.

I'll ask him whazzup.

Thanks Ducpainter.

Very interested to hear what your friend has to say as the Ducati tech at Coleman Powersports here in VA told me it was essential to the operation of the bike and without it I risked doing serious damage to the motor.  I think part of it was hype, so just curious....

[ducpainter]

Looking at it more closely, I believe the diverter is there initially to route oil through the cooler lines to the cooler. Without the spring, oil would simply run through the filter and then back through the engine.

The design of the spring seems to have a secondary function. If the oil pressure gets too high (symptom of a blocked cooler) the spring flexes and allows oil to run directly through the filter (as if the diverter wasn't there).

That almost makes sense.

[TitanMonsterS4R]

That almost makes sense.

Does the spring control the volume of oil that goes from to the engine?  By bypassing the oil cooler is the engine getting too much oil, potentially causing a leak or flood?

[ducpainter]

Does the spring control the volume of oil that goes from to the engine?  By bypassing the oil cooler is the engine getting too much oil, potentially causing a leak or flood?

Relax...

there is no danger of a leak or flood.

The spring controls the flow of oil through the cooler.

The only question seems to be whether it flows to the cooler without the spring.

[Howie]

My guess is the spring does control the volume of oil to the cooler verses the heads, and is needed to make sure the heads get enough oil.  I think you would have flow to the cooler, just not enough.  The ability to bypass the cooler with increased flow to the heads if the cooler clogs probably assures sufficient flow back to the sump since a clogged cooler could reduce flow back to the sump.

[TitanMonsterS4R]

Relax...

there is no danger of a leak or flood.

The spring controls the flow of oil through the cooler.

The only question seems to be whether it flows to the cooler without the spring.

40 minute ride this morning. Duc sounded fine and grumbled all the way to the office 

[ducpainter]

40 minute ride this morning. Duc sounded fine and grumbled all the way to the office 

was the cooler hot?