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Gordon Anderson
Joined: 16 Apr 2012
Posts: 41
Location: Switzerland
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 Posted: Fri Sep 28, 2018 8:16 am Post subject: Oil in air filter box |
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Hi all, I am just in the last stages of ground testing before first flight. I have a new IO-540 from Vans and have run it somewhere between 1 and 2 hours for run-ups and taxi tests.
After each engine run I have found a little oil inside the throttle body, some on the alternate air door, and some which appears to have been blown out the gap between the filter box and its support plate. That implies the oil finds its way into the filter box during running or priming.
Has anyone else seen this and know if it is normal during the first hours of break-in? I have called Lycoming and they don’t have a magic explanation, other than preservation oil still making its way out of the engine. That seems unlikely to me, so I’m looking for altrenative explanations.
Cheers
Gordon Anderson
Switzreland 41015
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Tim Olson
Joined: 25 Jan 2007
Posts: 2878
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| Posted: Fri Sep 28, 2018 8:35 am Post subject: Oil in air filter box |
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I am guessing they're right on with it just being preservative oil.
I'd think it should end after a couple flights.
Tim
On 9/28/2018 11:16 AM, Gordon Anderson wrote:
| Quote: |
Hi all, I am just in the last stages of ground testing before first flight. I have a new IO-540 from Vans and have run it somewhere between 1 and 2 hours for run-ups and taxi tests.
After each engine run I have found a little oil inside the throttle body, some on the alternate air door, and some which appears to have been blown out the gap between the filter box and its support plate. That implies the oil finds its way into the filter box during running or priming.
Has anyone else seen this and know if it is normal during the first hours of break-in? I have called Lycoming and they don’t have a magic explanation, other than preservation oil still making its way out of the engine. That seems unlikely to me, so I’m looking for altrenative explanations.
Cheers
Gordon Anderson
Switzreland 41015
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483422#483422
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