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Oil cooling problems

 
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Craymondw(at)aol.com
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PostPosted: Wed Jun 25, 2008 7:03 am    Post subject: Oil cooling problems Reply with quote

When I reported that my oil temp at 3,500 feet was 215 and 190 at 8,500 feet. On my last week end trip the out side air temp dropped from 92 to 79 at 8,500 feet. That is much cooler air going over the cylinders and through the oil cooler. Whenever I cruise at 3,500 feet on hot days in 90 plus weather using only 2300 RPM and 23 inches I still have 215 degree oil temps. In the winter I have to partially block my oil cooler inlet to keep my oil temp above 170. I once used temperature probes through out my engine compartment and found the air in the plenum the same as outside air temps. And I recorded oil cooler exhaust temps the same as my oil temperature. I noticed a slight increase in air temp in my oil cooler shroud and wrapped the ducting with foil insulation to keep that air cool. I also shined a bright light into the front of my cowl and noticed the seal had buckled down in two spots allowing air to get by and reshaped those areas. Any air that gets by the baffling increases air pressure around the oil cooler exhaust that restricts air flow through the cooler. I use a SW oil cooler.

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