Oil Temps too High

[rvbuilder2002]

Originally Posted by kdedmunds

The engine does have 250 hours. I bought the plane didn't build it. Last Thursday I was cruising at 6500ft with an OAT of 73. Full rich the oil temps showed 198. I leaned to 10.5 gal per hour and the temps started climbing slowly. I went back to full rich at 215. I will check for leaks as well as air blockage on the oil filter.

In that case the engine should be well broken in and not a factor.

As already mentioned, info about other details about the airplane might be relevant.
In particular, what type of ignition system it has and depending on that, what ignition timing profile is being used.

[RobB52]

I would like to join in on this thread. I have flown my RV-14 twice now and am concerned about high oil temp. IO-390 (1.8 hours), vans oil cooler, dual e-mags. I have the following indications:

OIL TEMP 220-225
74% power, MAP 24.2, RPM 2490, Oil PSI 72
CHTs(1,2,3,4) - 349, 339, 329, 324
EGTs (1,2,3,4) - 1210, 1190, 1230, 1230.
Mixture- Full Rich
4500' MSL, 67F OAT

Baffles have been checked by experienced RV builders and they say they look good. All holes filled with RTV and tight fitting. No cowling mods.

Should i be concerned at this point in break in with oil temps in the 220's? Others i have talked to seem to think this is high even for a new engine. I haven't tested the Garmin oil temp sensor, but i plan on doing that.

Other thoughts or comments would be appreciated.

Thanks

[Nova RV]

At 1.8hrs it's too soon to worry about the temp as long as it is within limits for the IO 390 which is 235 degrees F. Shallower climb or more speed and they should go down some but more time on the engine will cool things as well. As a general rule, most -14s that I know run low CHTs and high oil temps vs other RV models.

Originally Posted by RobB52

I would like to join in on this thread. I have flown my RV-14 twice now and am concerned about high oil temp. IO-390 (1.8 hours), vans oil cooler, dual e-mags. I have the following indications:

OIL TEMP 220-225
74% power, MAP 24.2, RPM 2490, Oil PSI 72
CHTs(1,2,3,4) - 349, 339, 329, 324
EGTs (1,2,3,4) - 1210, 1190, 1230, 1230.
Mixture- Full Rich
4500' MSL, 67F OAT

Baffles have been checked by experienced RV builders and they say they look good. All holes filled with RTV and tight fitting. No cowling mods.

Should i be concerned at this point in break in with oil temps in the 220's? Others i have talked to seem to think this is high even for a new engine. I haven't tested the Garmin oil temp sensor, but i plan on doing that.

Other thoughts or comments would be appreciated.

Thanks

[Carl Froehlich]

Rob,

As your CHTs look good, I’d guess you have the engine timed right and jumper in on the pMags.

For now I would get more hours on the engine and monitor the trend.

As I posted before, I’m a fan of the Airflow Systems coolers over the stock coolers Van’s includes in their FWF kit.

Carl

[bjdecker]

Originally Posted by Carl Froehlich

Rob,

As your CHTs look good, I’d guess you have the engine timed right and jumper in on the pMags.

For now I would get more hours on the engine and monitor the trend.

As I posted before, I’m a fan of the Airflow Systems coolers over the stock coolers Van’s includes in their FWF kit.

Carl

Ditto on the Airflow Systems or Real-Deal SW/Meggitt/Troy OC's.

Subjectively and objectively, the oil coolers with the "smooth" end-tanks perform better than their finned - clone - cousins...

I think DanC posted something about this difference some 16-odd years ago...


B

[Nova RV]

The Airflow Systems 2006X 13 row cooler is what comes in the FWF kit for the -14.

[Carl Froehlich]

Originally Posted by Nova RV

The Airflow Systems 2006X 13 row cooler is what comes in the FWF kit for the -14.

Really? I wonder when Van’s shifted from their standard “ EA OIL COOLER 20006A”.

Carl

[Nova RV]

Carl, perhaps the one you helped build was an early kit, The FWF parts list from my 2017 shipment shows this.
OIL COOLER 2006X RV-14 13 ROW
And the Vans website shows that part number and description as an Airflow Systems 2006X.

[flysrv10]

My CHT and oil temps were high for a long time until I replaced my Vernatherm. My understanding is that Vernatherms do not get checked during overhauls. My hangar neighbor had a similar issue and found two washers under the vernatherm so it never seated. Just something to check.

[Ironflight]

Originally Posted by flysrv10

My CHT and oil temps were high for a long time until I replaced my Vernatherm. My understanding is that Vernatherms do not get checked during overhauls. My hangar neighbor had a similar issue and found two washers under the vernatherm so it never seated. Just something to check.

Vernatherms are actually replacement items at overhaul - but I agree that too many people don’t understand that you only use the hard washer supplied, and nothing else....