Oil Temp.

[Joe Larussa]

What kind of oil temps are you guys seeing when taking off from sea level on a day that's roughly 75-80 Fahrenheit? Say you have a 3500' mountain to get over that's maybe 10 miles away. Yeah you could circle up, but just asking.

 

 

[Raptor05121]

Oil temp from the probe is usually 100*F hotter than ambient. With that said, mine is always smack dab on 180*F

[Joe Larussa]

Wow I saw 220 on climb out after reaching around 3500'

[mooneyspeed]

did you have a lot of ground run time before you got going?

[ArtVandelay]

OT slowly climbs to 190° on climb to 9000'

[N201MKTurbo]

It is not unusual to see 220 on climb out around here. It has a lot to do with ambient temperature. We have plenty of that lately.

[Bob_Belville]

I seldom see OT over 200F in climb. That's balls to the wall (almost - I turn prop knob back slightly to around 2650) but usually @ 110 knots IAS. In level flight in warm weather, flying LOP, OT will be 190-195F.

[Joe Larussa]

Maybe I'm climbing too steep? 26/26 and 1000 per minute. Not a lot of idle time.

Engine has about 300 after overhaul. Fresh oil cooler.

[N201MKTurbo]

We have to trust the engine and airframe engineers. They say the red line is 240. As long as it stays below that we are OK. I realize it is a bit unnerving seeing it that high, but I don't think it does any harm. I watched a Shell video once where the engineer said it is good for the oil. it removes the acid forming moisture in the oil.

[jrwilson]

19 minutes ago, Joe Larussa said:

Maybe I'm climbing too steep? 26/26 and 1000 per minute. Not a lot of idle time.

Engine has about 300 after overhaul. Fresh oil cooler.

Yeah, probably too steep.  Try 110 kts for climb, that should drop the temps a bit, but climb rate will suffer of course..

[flyntgr1]

What gauge are you looking at?  I noticed that my primary registers about 10 to 15 degrees cooler than my reading on the EI engine monitor.  I too see higher temps on climb out on hot days here in Alabama and will step climb to get the temp down.  

[Joe Larussa]

8 hours ago, flyntgr1 said:

What gauge are you looking at?  I noticed that my primary registers about 10 to 15 degrees cooler than my reading on the EI engine monitor.  I too see higher temps on climb out on hot days here in Alabama and will step climb to get the temp down.  

That would be from my JPI. I usually climb at 500 pm but I was pretty close to the mountains that I needed to get over. Wasn't that hot out and that's what surprised me. The opening on the cowl isn't that big, so I guess pitching too high doesn't allow much airflow.

[jrwilson]

10 hours ago, Joe Larussa said:

That would be from my JPI. I usually climb at 500 pm but I was pretty close to the mountains that I needed to get over. Wasn't that hot out and that's what surprised me. The opening on the cowl isn't that big, so I guess pitching too high doesn't allow much airflow.

Yeah pitch angle makes a huge difference, are temps usually fine at 500 fpm?  What was outside temp at your climb altitude?  You're near me and we often get temperature inversions.  You might have been 75 on the ground but 80 + at your cruise altitude, which is pretty warm...

[Joe Larussa]

7 hours ago, jrwilson said:

Yeah pitch angle makes a huge difference, are temps usually fine at 500 fpm?  What was outside temp at your climb altitude?  You're near me and we often get temperature inversions.  You might have been 75 on the ground but 80 + at your cruise altitude, which is pretty warm...

It was roughly 68-70 degrees on the ground. Was leaving Salinas for Sacramento. Not completely sure on the outside

temp while climbing. Kept focusing on oil temp. Certainly better typically at 500 fpm. I'm just a spaz when it comes to 

clearing the mountains. Same thing leaving Santa Barbara on a similar day. You at Cameron Park?

[jrwilson]

1 hour ago, Joe Larussa said:

It was roughly 68-70 degrees on the ground. Was leaving Salinas for Sacramento. Not completely sure on the outside

temp while climbing. Kept focusing on oil temp. Certainly better typically at 500 fpm. I'm just a spaz when it comes to 

clearing the mountains. Same thing leaving Santa Barbara on a similar day. You at Cameron Park?

I'm at Placerville 

[tony]

If there was an STC to incorporate the Lasar STC, which relocates the oil cooler back behind the number 4 cylinder, but leaves the factory original oil cooler configuration in the cowl as well, would anyone be interested in that?

[bonal]

Ok so permit me to borrow this thread I'm in annual right now and we are discussing what to do about my high oil temp. We decided to replace the vernatherm since the oil screen housing was already removed for inspection. The old therm looked very worn even had a groove forming around the stop that goes into the seat in the engine case. The question we could not find the answer to in all the manuals was what torque is required for the vernatherm into the housing. It came with an aluminum washer so not a crush washer but obviously a soft washer. Does anyone know how much  torque does it get tightened to or is it a set and then turn a number of degrees past set. The answer would be much appreciated. 

Another question is does the vernatherm open to allow oil flow to the cooler or does it close to force oil to the cooler.

THX 

[Bob_Belville]

23 minutes ago, bonal said:

Ok so permit me to borrow this thread I'm in annual right now and we are discussing what to do about my high oil temp. We decided to replace the vernatherm since the oil screen housing was already removed for inspection. The old therm looked very worn even had a groove forming around the stop that goes into the seat in the engine case. The question we could not find the answer to in all the manuals was what torque is required for the vernatherm into the housing. It came with an aluminum washer so not a crush washer but obviously a soft washer. Does anyone know how much  torque does it get tightened to or is it a set and then turn a number of degrees past set. The answer would be much appreciated. 

Another question is does the vernatherm open to allow oil flow to the cooler or does it close to force oil to the cooler.

THX 

Have you looked in a Lycoming Manual? The valve closes to force the oil through the cooler:

https://www.lycoming.com/content/understanding-oil-flow

...

The Thermostatic Oil Cooler Bypass Valve was designed to provide better control of the engine oil temperature while also maintaining the safety of the oil system by bypassing oil around an oil cooler which is plugged for any reason. The thermostatic oil cooler bypass valve may be used on engines which use the pressure screen system and on engines which have a full-flow oil filter. For most engine models, an oil filter also requires an oil filter adapter. While the oil is cold, this system allows oil to flow through the oil filter without passing through the oil cooler. As oil temperature rises to approximately 180˚ F, the valve closes and forces the oil to pass through the oil cooler. The oil then returns to the accessory housing where it is routed through the oil filter adapter, the filter and then again through the filter adapter, accessory housing and finally into the crankcase.

...

If this is the applicable document, the torque is 300 in.-lb. step 13.

Service Instruction No. 1008 C

INSTALLATION OF THERMOSTATIC OIL COOLER BYPASS VALVE

• PUBLICATIONS

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•  
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July 21, 2016

MODELS AFFECTED

All O-320, IO-320, O-340, O-360, IO-360, VO-360, HIO-360, IVO-360, O- 540, IO-540, IO-720, and TIO-541 engines that do not have a Thermostatic Oil Cooler Bypass Valve Assembly installed

https://www.lycoming.com/node/15780

[Ftlausa]

I keep mine below 200, and CHTs below 400, in the climb.  On a hot day, that means increasing the airspeed in the climb with reduced pitch.