Hi all, my J3 is almost ready to get back in the skies. I have overhauled my C85 and done the stroker upgrade and was wondering what every one recommends as a engine break in procedure? I have previously broken in 0320's with a high power setting two hour run at close to sea level, I am a bit concerned that my standard J3 only has just over 2hrs endurance by my calculations and was wondering what everyone else had done?
Engine break in procedure C85 Stroker
- Thread starter IainR
- Start date
bob turner
Registered User
I just flew mine normally, which is to say, the pattern. I am now at 250 hours with no mishaps save a piece of dirt under the relief valve at ten hours, and I burn a quart every twelve hours. I did use mineral oil for the first 25 hours.
cubdriver2
FRIEND
upstate NY
Finally got her up and running! I flew around the area for a while at full throttle but the temps crept past the 200 degree mark on my oil temp gauge and I got worried so throttled back and cooled her down a bit. How hot would you be happy to let the oil get and for how long?
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skywagon8a
MEMBER
SE Mass MA6
See NOTE 1: https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/73e923a0d5faef7e8525670e004526a4/$FILE/E-233.pdf
Oil temperature maximum limit is 225°F. The temperature is likely to come down a bit after the engine is broken in.
This is a good article on the subject: https://generalaviationnews.com/2018/03/18/best-oil-temperature-engine/
Oil temperature maximum limit is 225°F. The temperature is likely to come down a bit after the engine is broken in.
This is a good article on the subject: https://generalaviationnews.com/2018/03/18/best-oil-temperature-engine/
bob turner
Registered User
Continental says the green arc goes to 225, and you can operate there without damage. Why it gets that hot might be a different story.
Why would a Lycoming break-in procedure be better than Continental? Smarter engineers? More experience?
Why would a Lycoming break-in procedure be better than Continental? Smarter engineers? More experience?
Crash Jr.
Registered User
Anchorage, AK
My engine must be really broken in since it won't ever get above 140 degrees oil temp. I'm always amazed to see a J3 that actually makes good oil temp.
bob turner
Registered User
I am running three, and fly others. On a 70 degree day I expect around 180 degrees on what appear to be good gauges. When it hits 100 I expect 210 on the gauge.
