I recently decided to fit a spin-on oil filter to my C90-engined Stinson 105. This necessitated the removal of the oil cooler that has been there 15+ years. The first test flight gave very high oil temp readings close to max. I removed the filter, reconnected the oil cooler and temps returned to their usual low readings.
I have since fitted CHT probes on the two lower rear cylinders and they both give higher readings than I would have expected.( Below the 525F max but around 460 after 2 min climb.) The engine was zeroed just over 100hrs ago so I think it must be an airflow problem. The baffle set-up is a pretty standard one. Any thoughts would be appreciated.
C90 overheating
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Sandy Hutton LAA372
- Posts: 57
- Joined: Sat Jan 10, 2009 10:30 pm
Re: C90 overheating
Mike, have you removed (cut out 
) the original gauze filter? This is necessary for the modified filter to attain its full flow, which cools the oil.
) the original gauze filter? This is necessary for the modified filter to attain its full flow, which cools the oil.010321