Well I have always had higher oil temps than i would like but since I fly high and LOP alot it is never an issue. Low and slow is also not a problem.
Seems like the last oil change it got worse. Maybe it is just summer and not a new thing. Baffles are good and CHT are about 350 - 360 in fast cruise.
However if I don't run LOP peak oil temps will go to 230.
I have the standard Van's 20002A oil cooler mounted on the firewall with 3" SCAT. I don't have problems with climb but high power cruise.
I can climb to 8500' on a hot day and just start to see 200-210 but after another 5 minutes of cruise it can continue to climb.
I assume one of three problems.
Low airflow
hot air entering cooler
low oil flow i.e. bad or poorly seated vernatherm
I say hot air entering the cooler as a problem because my 3" baffle connection is very low and about halfway behind #4.
This weekend I checked air temps entering and leaving the cooler.
75 degree OA
85 degree oil cooler entering air
200 degree leaving air
209 degree oil temp.
These numbers lead me to believe position of my intake is fine. Only picking up 10 degrees over the cylinders.
I don't think my numbers help me with understanding low oil flow or low airflow.
My next step may be to pull the VT and check operation and seating.
It is a 340 hr. ECI Titan IO-320
a 320 doesn't make enough HP for the 20002a to be a capacity problem.
I may need to measure the oil line temp in and out next flight.
Any thoughts?
Seems like the last oil change it got worse. Maybe it is just summer and not a new thing. Baffles are good and CHT are about 350 - 360 in fast cruise.
However if I don't run LOP peak oil temps will go to 230.
I have the standard Van's 20002A oil cooler mounted on the firewall with 3" SCAT. I don't have problems with climb but high power cruise.
I can climb to 8500' on a hot day and just start to see 200-210 but after another 5 minutes of cruise it can continue to climb.
I assume one of three problems.
Low airflow
hot air entering cooler
low oil flow i.e. bad or poorly seated vernatherm
I say hot air entering the cooler as a problem because my 3" baffle connection is very low and about halfway behind #4.
This weekend I checked air temps entering and leaving the cooler.
75 degree OA
85 degree oil cooler entering air
200 degree leaving air
209 degree oil temp.
These numbers lead me to believe position of my intake is fine. Only picking up 10 degrees over the cylinders.
I don't think my numbers help me with understanding low oil flow or low airflow.
My next step may be to pull the VT and check operation and seating.
It is a 340 hr. ECI Titan IO-320
a 320 doesn't make enough HP for the 20002a to be a capacity problem.
I may need to measure the oil line temp in and out next flight.
Any thoughts?