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High oil temp...or instrumentation?

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bbradburry(at)verizon.net
Guest

Posted: Sat Oct 18, 2014 8:31 pm Post subject: High oil temp...or instrumentation?

A friend has been fighting high oil temps for several months on his O-320.

The last flight he saw a sudden drop in temp followed a few minutes later by

a spike which went away and the temps were then fine for the rest of the

flight.  I thought that the oil cooler bypass might have been stuck and then

opened but the temp dropped too fast I think for this to be a real temp

change.  It seems to me that it may be instrumentation.



He is also having obvious instrumentation problems with EGT#1.  It is very

erratic.  I hope some of you can give him a few ideas as to how he can

troubleshoot these problems and hopefully get them resolved.



Here is a link to a Savvy Analysis data dump that he made on the last

flight.



https://www.savvyanalysis.com/flight/741039/7be0f496-4815-45d2-9eee-4455fc4f

5e98



Any ideas would be appreciated.



Thanks,

Bill

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user9253

Joined: 28 Mar 2008
Posts: 1921
Location: Riley TWP Michigan

Posted: Sun Oct 19, 2014 4:29 am Post subject: Re: High oil temp...or instrumentation?

Bill Bradburry,

The Savvy Analysis data link that you posted is not publicly accessible.

The vast majority of electrical problems are due to bad connections.  The cause of more than one instrumentation problem is likely due to a bad ground connection.  I suggest that all ground wires and cables, related to the engine and to engine sensors, be disconnected at both ends, cleaned, inspected, and reconnected.  A thin film of grease on terminals will help prevent future corrosion.

Joe

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_________________
Joe Gores

ceengland7(at)gmail.com
Guest

Posted: Sun Oct 19, 2014 7:11 am Post subject: High oil temp...or instrumentation?

On 10/18/2014 11:30 PM, Bill Bradburry wrote:

 	  Quote: 	
		   



 A friend has been fighting high oil temps for several months on his O-320.

 The last flight he saw a sudden drop in temp followed a few minutes later by

 a spike which went away and the temps were then fine for the rest of the

 flight.  I thought that the oil cooler bypass might have been stuck and then

 opened but the temp dropped too fast I think for this to be a real temp

 change.  It seems to me that it may be instrumentation.



 He is also having obvious instrumentation problems with EGT#1.  It is very

 erratic.  I hope some of you can give him a few ideas as to how he can

 troubleshoot these problems and hopefully get them resolved.



 Here is a link to a Savvy Analysis data dump that he made on the last

 flight.



 https://www.savvyanalysis.com/flight/741039/7be0f496-4815-45d2-9eee-4455fc4f

 5e98



 Any ideas would be appreciated.



 Thanks,

 Bill



Unless he had an obvious very bad miss, the egt reading had to be sensor 
	


or instrument related.

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Bob McC

Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON

Posted: Sun Oct 19, 2014 8:22 am Post subject: High oil temp...or instrumentation?

I had no problem bring up the information. It appears accessible to me. The

link is split in the original e-mail and I had to enter the last 3

characters manually after clicking the link. (E98)



Bob McC



[quote] --

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_________________
Bob McC
Falco #908
(just starting)

n81jg(at)aol.com
Guest

Posted: Sun Oct 19, 2014 11:20 am Post subject: High oil temp...or instrumentation?

Had similar OT readings; OT needs good engine ground return. Found all Van's cable swages incomplete; battery ground pulled loose as I disconnect battery. Check swages and cable connections; easy fix.



John

RV7A



Sent from my iPhone



 	  Quote: 	
		   On Oct 18, 2014, at 9:30 PM, Bill Bradburry <bbradburry(at)verizon.net> wrote:

 

 

 

 A friend has been fighting high oil temps for several months on his O-320.

 The last flight he saw a sudden drop in temp followed a few minutes later by

 a spike which went away and the temps were then fine for the rest of the

 flight.  I thought that the oil cooler bypass might have been stuck and then

 opened but the temp dropped too fast I think for this to be a real temp

 change.  It seems to me that it may be instrumentation.

 

 He is also having obvious instrumentation problems with EGT#1.  It is very

 erratic.  I hope some of you can give him a few ideas as to how he can

 troubleshoot these problems and hopefully get them resolved.

 

 Here is a link to a Savvy Analysis data dump that he made on the last

 flight.

 

 https://www.savvyanalysis.com/flight/741039/7be0f496-4815-45d2-9eee-4455fc4f

 5e98

 

 Any ideas would be appreciated.

 

 Thanks,

 Bill

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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