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d3dw(at)sbcglobal.net
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 Posted: Thu Oct 14, 2010 4:20 pm Post subject: cooling |
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My temps are usually very stable. Last weekend I flew down on the deck over a lake for about six miles, ambient temp about 75, and the engine temp went down to 170. When I climbed out and flew back home the temp was right on 180, then would move quickly up and down about ten degrees...varying from about 170 to 190. I have never seen changes that quick.
this afternoon I took off at 180 degrees. On climbout I looked down and the engine temp was 150. When I leveled off it stabilized at 180. Then went down on descent, but while I rolled out and taxied back to the hangar it went up to 195. It was having a tendency to stay too cool while flying. I took off the belt, spun the water pump and it feels smooth and is quiet. does this sound like the thermostat? and have any of you replaced that thing or know where to get one? don walkerhttp://www.matronics.com/Navigator?Stratus-L - tronics.com/" rel=nofollow target=_blank>http://forums.matronics.com
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gkrysztopik(at)satx.rr.co
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| Posted: Thu Oct 14, 2010 6:57 pm Post subject: cooling |
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Maybe more of an instrumentation problem? Check for intermittent wiring connection, bad ground. Can you install another sensor and gauge somewhere? Not cheap or easy, but neither is a new engine or airplane. Do you have other temp gauges (oil, cyl, etc)?
On 10/14/2010 7:15 PM, Don Walker wrote: [quote]
| Quote: |
My temps are usually very stable. Last weekend I flew down on the deck over a lake for about six miles, ambient temp about 75, and the engine temp went down to 170. When I climbed out and flew back home the temp was right on 180, then would move quickly up and down about ten degrees...varying from about 170 to 190. I have never seen changes that quick.
this afternoon I took off at 180 degrees. On climbout I looked down and the engine temp was 150. When I leveled off it stabilized at 180. Then went down on descent, but while I rolled out and taxied back to the hangar it went up to 195. It was having a tendency to stay too cool while flying. I took off the belt, spun the water pump and it feels smooth and is quiet. does this sound like the thermostat? and have any of you replaced that thing or know where to get one? don walkerhttp://www.matronics.com/Navigator?Stratus-L - tronics.com/" rel=nofollow target=_blank>http://forums.matronics.com
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[b]
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d3dw(at)sbcglobal.net
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| Posted: Fri Oct 15, 2010 5:04 am Post subject: cooling |
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This is the stock Stratus CHT fitting on the back of the right head. My oil temp is running steady at 170. I'll check the guage fitting today on the CHT and the wiring. After 11 years on this HDS maybe somethng is loose...or corroded, but probably not. I have another CHT I can use if necessary. don
From: gary <gkrysztopik(at)satx.rr.com>
To: stratus-list(at)matronics.com
Sent: Thu, October 14, 2010 9:55:36 PM
Subject: Re: Re: cooling
Maybe more of an instrumentation problem? Check for intermittent wiring connection, bad ground. Can you install another sensor and gauge somewhere? Not cheap or easy, but neither is a new engine or airplane. Do you have other temp gauges (oil, cyl, etc)?
On 10/14/2010 7:15 PM, Don Walker wrote: [quote]
| Quote: |
My temps are usually very stable. Last weekend I flew down on the deck over a lake for about six miles, ambient temp about 75, and the engine temp went down to 170. When I climbed out and flew back home the temp was right on 180, then would move quickly up and down about ten degrees...varying from about 170 to 190. I have never seen changes that quick.
this afternoon I took off at 180 degrees. On climbout I looked down and the engine temp was 150. When I leveled off it stabilized at 180. Then went down on descent, but while I rolled out and taxied back to the hangar it went up to 195. It was having a tendency to stay too cool while flying. I took off the belt, spun the water pump and it feels smooth and is quiet. does this sound like the thermostat? and have any of you replaced that thing or know where to get one? don walkerhttp://www.matronics.co== |
[b]
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gkrysztopik(at)satx.rr.co
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| Posted: Fri Oct 15, 2010 5:23 am Post subject: cooling |
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I guess oil temp would be slower to change, and it could be a cylinder problem vs a whole engine problem (or instrumentation). Can you add egt's to see if it's fluctuating on one side and not the other?
Another idea is to get an infrared temperature gun and tie the plane up and have somebody run it hard while you check each cylinder or keep it on the same cylinder and see if the infrared tracks the gauge.
On 10/15/2010 8:02 AM, Don Walker wrote: [quote] This is the stock Stratus CHT fitting on the back of the right head. My oil temp is running steady at 170. I'll check the guage fitting today on the CHT and the wiring. After 11 years on this HDS maybe somethng is loose...or corroded, but probably not. I have another CHT I can use if necessary. don
From: gary <gkrysztopik(at)satx.rr.com> (gkrysztopik(at)satx.rr.com)
To: stratus-list(at)matronics.com (stratus-list(at)matronics.com)
Sent: Thu, October 14, 2010 9:55:36 PM
Subject: Re: Re: cooling
Maybe more of an instrumentation problem? Check for intermittent wiring connection, bad ground. Can you install another sensor and gauge somewhere? Not cheap or easy, but neither is a new engine or airplane. Do you have other temp gauges (oil, cyl, etc)?
On 10/14/2010 7:15 PM, Don Walker wrote: | Quote: |
| Quote: |
My temps are usually very stable. Last weekend I flew down on the deck over a lake for about six miles, ambient temp about 75, and the engine temp went down to 170. When I climbed out and flew back home the temp was right on 180, then would move quickly up and down about ten degrees...varying from about 170 to 190. I have never seen changes that quick.
this afternoon I took off at 180 degrees. On climbout I looked down and the engine temp was 150. When I leveled off it stabilized at 180. Then went down on descent, but while I rolled out and taxied back to the hangar it went up to 195. It was having a tendency to stay too cool while flying. I took off the belt, spun the water pump and it feels smooth and is quiet. does this sound like the thermostat? and have any of you replaced that thing or know where to get one? don walkerhttp://www.matronics.co== |
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[b]
| | - The Matronics Stratus-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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larry(at)macsmachine.com
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| Posted: Fri Oct 15, 2010 8:41 am Post subject: cooling |
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Hi Don,
The oddity that this particular thermostat is suggests you call Mykal at Stratus. Any really quick temp changes would seem to be sensor or possibly gage
problems. Actual readings can move 10 to 15 degrees in the span of a couple of minutes due to oil attitude in the pan, but quicker than that, I’d be looking at replacing
the sensor and doubling the gage for comparison.
Larry McFarland 601HDS at www.macsmachine.com
From: owner-stratus-list-server(at)matronics.com [mailto:owner-stratus-list-server(at)matronics.com] On Behalf Of Don Walker
Sent: Thursday, October 14, 2010 7:16 PM
To: stratus-list(at)matronics.com
Subject: Re: cooling
| Quote: |
My temps are usually very stable. Last weekend I flew down on the deck over a lake for about six miles, ambient temp about 75, and the engine temp went down to 170. When I climbed out and flew back home the temp was right on 180, then would move quickly up and down about ten degrees...varying from about 170 to 190. I have never seen changes that quick.
this afternoon I took off at 180 degrees. On climbout I looked down and the engine temp was 150. When I leveled off it stabilized at 180. Then went down on descent, but while I rolled out and taxied back to the hangar it went up to 195. It was having a tendency to stay too cool while flying. I took off the belt, spun the water pump and it feels smooth and is quiet. does this sound like the thermostat? and have any of you replaced that thing or know where to get one? don walkerhttp://www.matronics.com/Navigator?Stratus-L - tronics.com/" rel=nofollow target=_blank>http://forums.matronics.com</A - List Contribution sp; =======
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