My oil temperature has been increasing over the last few months. In an effort to troubleshoot, I have operated in harsh conditions to check temp accuracy, oil cooler in/out temps when high, etc. Harsh meaning afternoon flights (103°F, full power)
Details: RV-6A, O-360, constant speed prop
I have checked the following:
- Baffles - all appear to seal very well
- Oil Temp accuracy- checked sump at 240°F, after shutting down at 241°F
- Vernatherm (boiled in H2O..... opened at 184-188°F
- upgraded from 7 row cooler to 9 row cooler
- changed ducting from 3” to 4”
It takes about 15-20 minutes to reach 245°F with OAT of 103°F.
My thoughts are
(A) vernatherm expands ok, but not seating right- restricting flow
(B) timing haven’t checked that, but a friend mentioned that today
(C) outflow duct. Right now the oil cooler is open on bottom side. Another friend said to duct the flow out of engine compartment into stream for “suction”
Any help would be appreciated.
Details: RV-6A, O-360, constant speed prop
I have checked the following:
- Baffles - all appear to seal very well
- Oil Temp accuracy- checked sump at 240°F, after shutting down at 241°F
- Vernatherm (boiled in H2O..... opened at 184-188°F
- upgraded from 7 row cooler to 9 row cooler
- changed ducting from 3” to 4”
It takes about 15-20 minutes to reach 245°F with OAT of 103°F.
My thoughts are
(A) vernatherm expands ok, but not seating right- restricting flow
(B) timing haven’t checked that, but a friend mentioned that today
(C) outflow duct. Right now the oil cooler is open on bottom side. Another friend said to duct the flow out of engine compartment into stream for “suction”
Any help would be appreciated.