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Oil temps??

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k9hxt(at)sbcglobal.net
Guest

Posted: Mon Jul 17, 2006 6:07 am Post subject: Oil temps??

I'm flying a RV-6A I built a few years ago and have always had oil temps about 220Â°F on 90Â° days..

 I am wondering what the difference is between the RV-6 and 6A that causes many 6A's to have elevated oil temps.  Besides the nose wheel structure in the cowling air exit that is.  If you have a tri gear and experience the same malady, do you have the intersection fairing between the nose wheel strut and the lower cowl?? I do not as of now.  My baffles are sealed about as well as I can get them also.   That is a high pressure area during flight and I wonder if enough air is leaking into the cowl to raise the pressure in the lower section, i.e. less flow.  If you have the fairing and have "normal" temps I would appreciate feedback also. 

  

 Thanks fellas,

 Larry ,   RV-6A N939LT at 2R2

 

"LIMA TANGO SENDS"

klwerner(at)comcast.net
Guest

Posted: Mon Jul 17, 2006 7:30 am Post subject: Oil temps??

You may consider building an exit  ramp inside the cowling that looks like a fairing around the whole nosegear  cluster. This should smooth the hot exit airflow quite a  bit...

 How are you CHT's doing when the oil  is at 220 degrees?  Perhaps you just need a better oil-cooler arrangement  if all else is in the green, but not the oil.

  

 do not archive

 [quote]   ---

k9hxt(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 6:06 am Post subject: Oil temps??

Thanks for reply..............I am using the 7 tube cooler Van's sells and it is mounted on the left rear baffle. This is what Van's suggests for a 0-360. Surely I am not the only guy with this "challenge?'

 My CHT's are about 325Â°F.........

 Larry

 

"LIMA TANGO SENDS" 



 ---

klwerner(at)comcast.net
Guest

Posted: Tue Jul 18, 2006 6:37 am Post subject: Oil temps??

Looks like your CHT's are right where  they should be, if not very slightly on the cool side. Have you  checked the calibration of you Oil Temp Sensor in boiling water? Is your  Vernatherm operating correctly?  

 Konrad

 [quote]   ---

dick(at)rclabs.com
Guest

Posted: Tue Jul 18, 2006 7:17 am Post subject: Oil temps??

Hi;

 I had a similar problem and checked my temp sender  in boiling water. It was reading 15 deg. high. Solved my problem.

  

 RW

 [quote]   ---

tcervin(at)valkyrie.net
Guest

Posted: Tue Jul 18, 2006 7:56 am Post subject: Oil temps??

     I have a S&W 8432-R mounted on  the firewall of my RV6-A powered by an 0-360A1A and Hartzell Prop. My oil  temperature over the weekend was 175 deg. at cruise and 190 on my initial  clime to 5500. Our temperature here in Ohio was a hot,humid 92  degrees.

                                                                                                       Tom in Ohio     

 [quote]   ---

scott(at)randolphs.net
Guest

Posted: Tue Jul 18, 2006 8:13 am Post subject: Oil temps??

My RV6a flies with low oil temps, if anything.  They seem to hover between

150 and 170 all the time.  Configuration of the nose gear fairing doesn't

seem to have much affect, if any, as I've flown it with a bar nose leg, as

well was with the full leg and intersection fairing and not seen much

difference.  I've actually been contemplating putting a small plate over a

portion of my oil cooler to bring the average temperature up 20 or 30

degrees to ensure the oil is getting hot enough to clean itself out each

flight.



Scott

RV6A 550 hours (200 by me)

kbob(at)cox.net
Guest

Posted: Tue Jul 18, 2006 8:14 am Post subject: Oil temps??

The difference may be that I'm running an O-320 with 9.2:1 CR and EMag.  The O-320 is normally a lot cooler on the oil than the 360.



---- Larry Rush <k9hxt(at)sbcglobal.net> wrote: 

[quote] Thanks for reply..............I am using the 7 tube cooler Van's sells and it is mounted on the left rear baffle. This is what Van's suggests for a 0-360. Surely I am not the only guy with this "challenge?'

 My CHT's are about 325Â°F.........

 Larry

  

 "LIMA TANGO SENDS" 

 

 

 

 ---

dbris200(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 8:57 am Post subject: Oil temps??

The same warning applies to low temps as well as high temps. The sender may be bad. So if you cover the oil cooler without first checking the sender, you may have high oil temps and not know it.

 It's not that much trouble to check and I'd recommend that everyone check it at least once.

 

 Dave B.  -6 So Cal

 EAA Technical Counselor

 

 Scott wrote:  	  Quote: 	
		      	  Quote: 	
		  --> RV6-List message posted by: "Scott" <scott(at)randolphs.net> (scott(at)randolphs.net)



My RV6a flies with low oil temps, if anything.  They seem to hover between

150 and 170 all the time.  Configuration of the nose gear fairing doesn't

seem to have much affect, if any, as I've flown it with a bar nose leg, as

well was with the full leg and intersection fairing and not seen much

difference.  I've actually been contemplating putting a small plate over a

portion of my oil cooler to bring the average temperature up 20 or 30

degrees to ensure the oil is getting hot enough to clean itself out each

flight.



Scott

RV6A 550 hours (200 by me)

beech19pilot(at)yahoo.com
Guest

Posted: Tue Jul 18, 2006 1:05 pm Post subject: Oil temps??

How would you recomend checking the sender.

   

  Mark



"D.Bristol" <dbris200(at)sbcglobal.net> wrote:

   	  Quote: 	
		  The same warning applies to low temps as well as high temps. The sender may be bad. So if you cover the oil cooler without first checking the sender, you may have high oil temps and not know it.

It's not that much trouble to check and I'd recommend that everyone check it at least once.



Dave B.  -6 So Cal

EAA Technical Counselor



Scott wrote:    	  Quote: 	
		   	  Quote: 	
		  --> RV6-List message posted by: "Scott" <scott(at)randolphs.net> (scott(at)randolphs.net)    My RV6a flies with low oil temps, if anything.  They seem

 to hover between  150 and 170 all the time.  Configuration of the nose gear fairing doesn't  seem to have much affect, if any, as I've flown it with a bar nose leg, as  well was with the full leg and intersection fairing and not seen much  difference.  I've actually been contemplating putting a small plate over a  portion of my oil cooler to bring the average temperature up 20 or 30  degrees to ensure the oil is getting hot enough to clean itself out each  flight.    Scott  RV6A 550 hours (200 by me)                                   	
	
	




  		How low will we go? Check out Yahoo! Messenger’s low  PC-to-Phone call rates.

dick(at)rclabs.com
Guest

Posted: Tue Jul 18, 2006 1:49 pm Post subject: Oil temps??

Checked mine by:

  

 1.) Remove the sender from the engine.

 2.) Boil some water.  I then poured the hot  water into a tin can.

 3.) Checked the temp of the hot water with a  thermometer, I used one from the kitchen. I think they are called candy  thermometers.

 4) Put the probe in the hot water and have someone  read the temp on the oil temp gage and compare it with the candy thermometer.  They should be the same. 

  

 Using this method you can watch both temps drop as  the water cools. 

  

 The downside to this is that at sea level the best  you can check is around 212 deg. But if your off by 15 deg as I was that will  tell you a lot.

  

 RW

 [quote]   ---

k9hxt(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 2:07 pm Post subject: Oil temps??

First guy I have heard from who has "low" temps.  Have you checked your sender in boiling water?

 Larry

 

"LIMA TANGO SENDS" 



 ---

k9hxt(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 2:12 pm Post subject: Oil temps??

How do you recemend checking the varitherm?  Boiling water again? 

 Larry

 

"LIMA TANGO SENDS" 



 ---

k9hxt(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 2:18 pm Post subject: Oil temps??

I have endured this for far too long and am about this close (2 fingers about 1/4" apart) to investing in a nine tube cooler, if I can squeeze it in. Aero Classic has one I think will fit.(like 3/4" wider).

 Larry

 

"LIMA TANGO SENDS"  



 ---

k9hxt(at)sbcglobal.net
Guest

Posted: Tue Jul 18, 2006 2:20 pm Post subject: Oil temps??

Put it in boiling water.  I used one of the coffee cup heaters in a large coffee cup. Got 212Â°F on the gage.

 Larry,N939LT RV-6A hot oil

 

"LIMA TANGO SENDS" 



 ---

ronlee(at)pcisys.net
Guest

Posted: Tue Jul 18, 2006 3:43 pm Post subject: Oil temps??

At 04:17 PM 7/18/2006, you wrote:

 	  Quote: 	
		  I have endured this for far too long and am about this close (2 fingers 

about 1/4" apart) to investing in a nine tube cooler, if I can squeeze it 

in. Aero Classic has one I think will fit.(like 3/4" wider).

Larry




	


You must not have read my posts about improving exit air flow.

Lowered my oil temps substantially by opening the lower cowl and

adding louvers



http://home.pcisys.net/~ronlee/RV6A/Cowl_Louver_Small.jpg



Ron Lee

klwerner(at)comcast.net
Guest

Posted: Tue Jul 18, 2006 7:13 pm Post subject: Oil temps??

Larry,

 I'd rather do it in very warm  oil, just make sure it does not get hot enough to catch  fire (i.e. put the pot of oil within a pot of boiling  water).

 Just don't like mechanical things in  the oilsystem to be immersed in water, that's all.  Take a  good thermometer and verify opening and closing temps.

  

 I am no A&P, so please get  yourself a second opinion!

 [quote]   ---

FLYaDIVE(at)aol.com
Guest

Posted: Thu Jul 20, 2006 11:46 am Post subject: Oil temps??

In a message dated 7/18/2006 5:07:20 PM Eastern Standard Time, beech19pilot(at)yahoo.com writes:

  	  Quote: 	
		   How would you recomend checking the sender.

  

 Mark



"D.Bristol" <dbris200(at)sbcglobal.net> wrote:

  	  Quote: 	
		  The same warning applies to low temps as well as high temps. The sender may be bad. So if you cover the oil cooler without first checking the sender, you may have high oil temps and not know it.

It's not that much trouble to check and I'd recommend that everyone check it at least once.



Dave B.  -6 So Cal

EAA Technical Counselor 	
	


 ===========================================================

 How to check the sender is dependent on which temperature sending unit and gage you have.

 If you are using the Stewart Warner type unit then here is the procedure:

 1 - Heat 1 quart of OIL up to 250 Deg F - Use a lab thermometer to check temps

 2 - At 250 Deg F the RESISTANCE reading of the sending unit should be 28.5 Ohms

  

 Since you are heating up the oil and have things apart insert the Vernatherm into the oil also.  

 You should see an INCREASE in height of 3/8"

 Also inspect the sealing face of the Vernatherm for "Ballentineing - RINGS - GROVES"  and especially for offset rings on the sealing face.  Failure to have a good seal face is one of the major problems in cooling.

 Also, check the crimped end nut on the Vernatherm.  There is an AD requiring inspection at every oil change unless you have the type with the roll-pin through the crimp nut.

  

 To check the gage reverse the procedure ...

 Hook up 13.8 V DC through a variable resistor adjust the variable resistor to 28.5 ohms and you should obtain a full scale deflection of the gage to 250 Deg F (Red Line).

  

 Other gages should come with instructions or call the manufacture.

  

  

 Barry

"Chop'd Liver"

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