Christopher Murphy
Well Known Member
Im having an issue with my o-320 in my RV4. I never had higher than 210 deg oil temps on the hottest 100 plus degree days. Then one day (85f) it ran up to about 220 and I started looking for the reason. I have checked all the baffles and the cht are all 350 or less. I checked for obstruction in the oil cooler scat tube. I pulled the vernatherm and checked it in a pan of hot water and it was not extending the correct distance by about .030 inch so I replaced it. I still have the high oil temp issue so I replaced the cooler. No help.
Any suggestions from you engine gurus? I replaced a broken temp sensor before all this started and tested the sensor and guage with boiling water test and it appeared to be accurate.
How sensitive is the seat of the vernatherm? I know the seat can be reworked for a better seal. Is that fairly common? The engine has 1150 hours on it
Is there a way to check to see if oil is flowing through the cooler? Thermal scan?
This has me stumped.
Thanks in advance.
Any suggestions from you engine gurus? I replaced a broken temp sensor before all this started and tested the sensor and guage with boiling water test and it appeared to be accurate.
How sensitive is the seat of the vernatherm? I know the seat can be reworked for a better seal. Is that fairly common? The engine has 1150 hours on it
Is there a way to check to see if oil is flowing through the cooler? Thermal scan?
This has me stumped.
Thanks in advance.