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Oil Temps.....

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HawkerPilot2015

Joined: 10 Jan 2006
Posts: 503

Posted: Mon Jun 18, 2007 9:56 am Post subject: Oil Temps.....

This will be the first of a few post....

I know this will vary based on location, but here in SW Ohio, I have seen some pretty high oil temps while doing nothing more than tooling around the pattern. A few times, approaching the red. At cruise on a cool (70* F) morning and at 2500msl, I have temps of 170 CHT and 70 oil. 



Thoughts on getting those temps down a little? One -52 owner mentioned soaking in some MEK for a few days then a cooler flush. Good temps since (on the low side even).

talew(at)bellsouth.net
Guest

Posted: Mon Jun 18, 2007 11:35 am Post subject: Oil Temps.....

Tim,

I think cleaning the oil cooler is a great idea, however, to do it correctly 

you need special tools and sometimes the cooler must be taken apart to 

assure it is thoroughly clean.

The danger of only partially cleaning the cooler is that you don't know if 

it contains metal or carbon particles that might come loose later with bad 

results.

Terry

---

mark.bitterlich(at)navy.m
Guest

Posted: Mon Jun 18, 2007 11:53 am Post subject: Oil Temps.....

Tim, mine is the same.  When the outside air temps get up past 90

degrees on a humid day, even pattern work gets me very very close to the

red markings on the oil temp.  Pulling the oil cooler is not the most

difficult thing in the world to do, but it is not a lot of fun either.

It's a good thing though to pull that oil cooler shroud every now and

then and inspect that oil cooler BRACKET!  Look at the top right and

left holes where it bolts into the aircraft and check for cracks.  Very

few people pull that oil cooler shroud on the annual/conditional

inspection and check that oil cooler bracket.  There is a company that I

can't remember the name of (but will find out) where you can send the

cooler, have it split apart, the cooler itself replaced keeping the end

"tanks" per se.  This gives you a whole new cooler (more or less) and it

is what both of us should probably consider.  I wonder though, because

the Sukhoi's here with the PF engines also run HOT HOT HOT in N.C.

summer weather.  There is a lot of talk about somehow wrenching in a

BIGGER oil cooler.  



Glad to hear I am not the only one suffering from that problem!  



Mark Bitterlich

 



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napeone

Joined: 10 Jan 2006
Posts: 36
Location: Birmingham, Al.

Posted: Mon Jun 18, 2007 2:12 pm Post subject: Re: Oil Temps.....

My Yak 50's oil temp in the summer is mid green. The 52 is low green.

The cht on the 50 is cool. Bottom of green with cowl flaps open. The 52 is higher 180-190C.  Both burn about the same amount of fuel at the same power settings. No conclusions.

David H.

mark.bitterlich(at)navy.m
Guest

Posted: Mon Jun 18, 2007 2:36 pm Post subject: Oil Temps.....

Outside air temp is what, during these readouts?  



Mark

 



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talew(at)bellsouth.net
Guest

Posted: Mon Jun 18, 2007 4:59 pm Post subject: Oil Temps.....

Guys,

You need to be sure that your temp. probes are accurate. What I did was use 

a cup of water with a coffee heater in it and run the water up to boil with 

a probe in the water. I then adjusted the instrument to read 100 C  They 

were both off about 15 C

 Terry                                                                       

         ---

yakplt(at)yahoo.com
Guest

Posted: Mon Jun 18, 2007 6:52 pm Post subject: Oil Temps.....

That is a REALLY good suggestion Terry.  REALLY GOOD!!!!  

   

  Where is the adjustment, behind the gage itself?  

   

  Mark Bitterlich



Terry Lewis <talew(at)bellsouth.net> wrote:

  [quote]--> Yak-List message posted by: "Terry Lewis" 



Guys,

You need to be sure that your temp. probes are accurate. What I did was use 

a cup of water with a coffee heater in it and run the water up to boil with 

a probe in the water. I then adjusted the instrument to read 100 C They 

were both off about 15 C

Terry 

---

wlannon(at)cablerocket.co
Guest

Posted: Mon Jun 18, 2007 8:12 pm Post subject: Oil Temps.....

Does not sound like a problem Tim. 170C (CHT) and 70C (oil) is right where 

they should be.

Can't speak to the Yak 50/52 but the CJ problem (with the Huosai) is cold 

oil - barely 50C most of the time. CHT is easily controlled by the shutters.



---

jland(at)popeandland.com
Guest

Posted: Mon Jun 18, 2007 8:32 pm Post subject: Oil Temps.....

Speaking of CJ's and Huosai's, has anyone figured out any oil mods (similar

to an inverted system) to keep from puking oil all over the place when doing

acro?

[quote] From: Walter Lannon <wlannon(at)cablerocket.com>

 Reply-To: <yak-list(at)matronics.com>

 Date: Mon, 18 Jun 2007 21:12:15 -0700

 To: <yak-list(at)matronics.com>

 Subject: Re: Oil Temps.....

 

 

 

 Does not sound like a problem Tim. 170C (CHT) and 70C (oil) is right where

 they should be.

 Can't speak to the Yak 50/52 but the CJ problem (with the Huosai) is cold

 oil - barely 50C most of the time. CHT is easily controlled by the shutters.

 

 ---

talew(at)bellsouth.net
Guest

Posted: Tue Jun 19, 2007 5:01 am Post subject: Oil Temps.....

Mark,

 On the CJ the CHT adjustment is on the  front.

 My oil temps were accurate so I didn't look to  adjust them.

 Terry

 [quote]   ---

HawkerPilot2015

Joined: 10 Jan 2006
Posts: 503

Posted: Tue Jun 19, 2007 5:07 am Post subject: Re: Oil Temps.....

 	  Quote: 	
		  Does not sound like a problem Tim. 170C (CHT) and 70C (oil) is right where they should be. Can't speak to the Yak 50/52 but the CJ problem (with the Huosai) is cold  oil - barely 50C most of the time. CHT is easily controlled by the shutters. 	




Those temps were in a nice leisurely cruise. In the pattern buzzing around, the oil creeps up to 80 or 90+.

jonboede(at)hotmail.com
Guest

Posted: Tue Jun 19, 2007 5:33 am Post subject: Oil Temps.....

Define "on the front"?   On the front of the gauge?



And pardon me for behing half awake, but the CHT for the front seat gauge in 

the CJ is around one of the #4 sparks and the CHT for the back seat gauge is 

around one of the #1 cylinder spark plus, yes?  I like the cup of hot water 

idea a lot!



Jon

[quote]From: "Terry Lewis" <talew(at)bellsouth.net>

Reply-To: yak-list(at)matronics.com

To: <yak-list(at)matronics.com>

Subject: Re: Re: Oil Temps.....

Date: Tue, 19 Jun 2007 09:00:04 -0400



Mark,

On the CJ the CHT adjustment is on the front.

My oil temps were accurate so I didn't look to adjust them.

Terry

   ---

JBernier(at)dart.org
Guest

Posted: Tue Jun 19, 2007 5:38 am Post subject: Oil Temps.....

Jay

 When the CJ goes inverted, the oil stand pipe in the oil tank gets filled. When it comes back to level flight this oil drains out and dumps a few ounces of oil. If you could just get that oil to stay, or return to the tank. problem solved. The Huosai has an atmospheric vent on top of the supercharger. You will find a thumb screw cap in the vent tube. Plumb the oil tank vent hose to this thumb screw opening. I took the vent off the engine and threaded it for a ? inch barbed hose fitting to match the oil tank hose. (I seem to remember 1/2 inch?) No more leaking oil. It has been this way for 40 hours now with no problems. It's a quick fix that works. I have seen one other CJ with the same fix.

 Jim B



 	  Quote: 	
		  >> Jay Land <jland(at)popeandland.com> 6/18/2007 11:31 PM >>>

--> Yak-List message posted by: Jay Land <jland(at)popeandland.com>
	




Speaking of CJ's and Huosai's, has anyone figured out any oil mods (similar

to an inverted system) to keep from puking oil all over the place when doing

acro?

[quote] From: Walter Lannon <wlannon(at)cablerocket.com>

 Reply-To: <yak-list(at)matronics.com>

 Date: Mon, 18 Jun 2007 21:12:15 -0700

 To: <yak-list(at)matronics.com>

 Subject: Re: Oil Temps.....

 

 --> Yak-List message posted by: "Walter Lannon" <wlannon(at)cablerocket.com>

 

 Does not sound like a problem Tim. 170C (CHT) and 70C (oil) is right where

 they should be.

 Can't speak to the Yak 50/52 but the CJ problem (with the Huosai) is cold

 oil - barely 50C most of the time. CHT is easily controlled by the shutters.

 

 ---

jland(at)popeandland.com
Guest

Posted: Tue Jun 19, 2007 6:25 am Post subject: Oil Temps.....

Good idea, thanks Jim

 

 

 From: Jim Bernier <JBernier(at)dart.org>

 Reply-To: <yak-list(at)matronics.com>

 Date: Tue, 19 Jun 2007 08:37:57 -0500

 To: <yak-list(at)matronics.com>

 Subject: Re: Oil Temps.....

 

 Jay

 When the CJ goes inverted, the oil stand pipe in the oil tank gets filled. When it comes back to level flight this oil drains out and dumps a few ounces of oil. If you could just get that oil to stay, or return to the tank. problem solved. The Huosai has an atmospheric vent on top of the supercharger. You will find a thumb screw cap in the vent tube. Plumb the oil tank vent hose to this thumb screw opening. I took the vent off the engine and threaded it for a ? inch barbed hose fitting to match the oil tank hose. (I seem to remember 1/2 inch?) No more leaking oil. It has been this way for 40 hours now with no problems. It's a quick fix that works. I have seen one other CJ with the same fix.

 Jim B

 

 >>> Jay Land <jland(at)popeandland.com> 6/18/2007 11:31 PM >>>

 --> Yak-List message posted by: Jay Land <jland(at)popeandland.com>

 

 Speaking of CJ's and Huosai's, has anyone figured out any oil mods (similar

 to an inverted system) to keep from puking oil all over the place when doing

 acro?

 

 

 > From: Walter Lannon <wlannon(at)cablerocket.com>

 > Reply-To: <yak-list(at)matronics.com>

 > Date: Mon, 18 Jun 2007 21:12:15 -0700

 > To: <yak-list(at)matronics.com>

 > Subject: Re: Oil Temps.....

 > 

 > --> Yak-List message posted by: "Walter Lannon" <wlannon(at)cablerocket.com>

 > 

 > Does not sound like a problem Tim. 170C (CHT) and 70C (oil) is right where

 > they should be.

 > Can't speak to the Yak 50/52 but the CJ problem (with the Huosai) is cold

 > oil - barely 50C most of the time. CHT is easily controlled by the shutters.

 > 

 > ---

talew(at)bellsouth.net
Guest

Posted: Tue Jun 19, 2007 6:26 am Post subject: Oil Temps.....

Front of the CHT gauge.

The probe position sounds correct.

Terry

---

mark.bitterlich(at)navy.m
Guest

Posted: Tue Jun 19, 2007 12:45 pm Post subject: Oil Temps.....

Well since I am talking about OIL TEMPERATURE, now I am really confused.

Mark

 



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