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thilo.kind(at)gmx.net
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 Posted: Thu Jul 08, 2010 4:59 am Post subject: CHT temps |
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Hi folks,
in need for some advice. I'm flying a Zodiac CH 601 HDS with Rotax 912 UL. Engine parameters are monitored with an EIS. CHT temps were always around 100 F plus / minus a bit depending on OAT. Water temps in cruise are 150 F.
Both CHT's were always the same with little to no fluctuation. That seemed a bit strange, so I recently disconnected the wire harness from the EIS and from the CHT and measured the cables. Everything seemed fine and I put it back to together. Now I observing basically the same CHT temps, but they fluctuate quite a bit - within a few seconds they might go up to 125 F and fall right back, etc. Anybody with an idea about the cause?
Thanks
Thilo
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Thu Jul 08, 2010 5:11 am Post subject: Re: CHT temps |
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A loose connection will cause this, and seeing that you just removed the wires that would be my guess. The connections on the CHT probe should be snug and not loose to move freely. It should be snug on the probe end. If you are really running 100F then that is too cold. Or did you mean 100C?
What rpm are you cruising at, what are the oil temps and EGT's if you have this info. Typically water temp and CHT's are only a few degree spread, 50F is more than it should be.
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Roger Lee
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