I have an IO-320 6A. The oil cooler is a Mocal 10 row (same as Setrab and heard several reports of success with 7 row version) mounted on the baffle behind #4. Hoses are new; replaced this spring, -6 size.
I had goods success last fall, with temps remaining in the 190 range even in 90* ambient days. This spring I noticed higher temps reaching max's of 220-225 at 75% power levels. I have replaced the cooler, as I thought it may have become blocked with all the carbon I had in the oil during break-in (due to a glazed cylinder). I have two different verhatherms that I have tried (neither new). The one I flew with today was tested last night. I put it in 190* water and observed a growth of .230" I saw Dan's post and his tested at .248" The minimum is .160 or .180. It would seem that the Vernatherm is working properly.
I don't really know where to go next. I can't see in the vernatherm cavity and I have considered removing the oil filter housing (lycoming style with V/T pointing down) and replacing with screen to rule out issues with the bore that the vernatherm seals. I think that I also have a spring and plug laying around to bypass the vernatherm all together. I have also considered buying a new vernatherm.
Does anyone have suggestions or seen similar problems they could share insight from?
Thanks,
Larry
I had goods success last fall, with temps remaining in the 190 range even in 90* ambient days. This spring I noticed higher temps reaching max's of 220-225 at 75% power levels. I have replaced the cooler, as I thought it may have become blocked with all the carbon I had in the oil during break-in (due to a glazed cylinder). I have two different verhatherms that I have tried (neither new). The one I flew with today was tested last night. I put it in 190* water and observed a growth of .230" I saw Dan's post and his tested at .248" The minimum is .160 or .180. It would seem that the Vernatherm is working properly.
I don't really know where to go next. I can't see in the vernatherm cavity and I have considered removing the oil filter housing (lycoming style with V/T pointing down) and replacing with screen to rule out issues with the bore that the vernatherm seals. I think that I also have a spring and plug laying around to bypass the vernatherm all together. I have also considered buying a new vernatherm.
Does anyone have suggestions or seen similar problems they could share insight from?
Thanks,
Larry