High Oil Temp.

[Skywarrior]

Any other Bravo drivers notice their oil temp shoot up and peg the meter on the right side, then have it eventually settle down to around 240 deg.?

This during 24/24 operation at low altitude.

Chuck M.

[FoxMike]

Chuck,

When I see my oil the oil temp get above 210dF I do something about it.  If climbing increase speed (120K or so) and make sure cowl flaps are open.  If in cruise trail cowl flaps and reduce power a little.  When I get home I check cowl flaps for proper rigging, evaluate baffling material to be sure it is sealing properly.  Might even check to be sure temp guage is giving correct indication.  Vernatherm may not be forcing all the oil thru cooler.  Temp of 240dF is way to hot.

Walt 

 

 

[johnggreen]

Chuck,

My Bravo runs nicely within all the desired parameters, CHT and OT regardless of power or altitude.  I credit a lot of this to a really good baffling job when the engine was pulled at 500 hours for the crankshaft AD.

If you oil tem guage is correct, you have a serious problem that should be sorted out now.  In addition to engine wear, oil begins to break down QUICKLY at temps over 220.

Jgreen

[skyking]

I dont like anything above 200F.

[gjkirsch]

Do you have a seperate engine monitor to verify the gauge?  FWIW, I can't recall ever seeing above 205 degrees (even in climb)in over 600 hours in Bravo's.  I am typically in the low to mid 190's running 30/24. 

[Awful_Charlie]

I've never seen 200 or over on the factory.  If you have an engine monitor, remember that the factory guage and the port at the front of the engine normally used for a monitor are measuring different oil temps, so it is likely that they won't be the same.

On my monitor, the max I've got is 195, the average about 175

[2jetman]

 

Hi Chuck,

I was just curious if you were still having the high oil temp indication or if you had found the cause. I thought mine was running a little on the high side in the mid to upper 190’s, but it looks like mine is right in line with all the others on the post.

Tommy

[jetdriven]

190 after the oil cooler and 190 before it are two separate things.  Where is the engine monitor probe? Where is the factory probe?

[2jetman]

Byron,

That’s a good question; I’ll take a look at it and see. What is the typical configuration?

 Tommy

[jetdriven]

I think on the J it is measured after the oil cooler.  Yours is a M so I have no idea.  But the two readings  (before and after) are going to be 20-30 degrees different. But you are measuring different things.

 

[gjkirsch]

On Both Bravo's I've owned, the engine gauge appears to indicate a bit lower temp than the JPI.  That said, neither plane ever went much over 200 degrees regardless of the outside temp, phase of flight (climb or cruise) or altitude.  Normally, I see the mid to upper 190's on the JPI flying 30/2400.  I would think that something is wrong with 240 degrees being indicated.  Maybe as minor as the gauge or temp sensor or something serious.  As the oil is also cooling the cylinder heads, what temps are you seeing there? I am typically around 350 degrees.

[Skywarrior]

Update: Looks like my Oil Temp gauge was acting erratically due to condensation inside the instrument. My hangar has been really damp this year. (Yeah, believe me, I know... A drier hangar I'd had my eyes on recently disappeared in a tornado. Maybe I'll try again when it's rebuilt.)

I've been tapping on my gauges before runup each flight, and they have behaved much better.