REFLECTOR: Cont'd oil temp problems

[Ron Brown]

How hot are your CHT's?  High head/engine temps will cause high oil temps. 
If you have the engine running cool - less than 350 CHT's, then start 
working on the oil cooler problems.

If the engine (CHT's) are hot, I would suggest you work on engine ducts and 
baffling and get that fixed first.  Then you can go after the cooler issues.

That engine out back WILL run cool - just got to get the installation right.

Ronnie

----- Original Message ----- 
From: "Tom" <tomcat05 at comcast.net>
To: <reflector at tvbf.org>
Sent: Tuesday, March 27, 2007 11:18 AM
Subject: REFLECTOR: Cont'd oil temp problems


> Finally got 255DM running again (it's a standard fg with an
> IO360)--replaced the leaky oil cooler (OH from Pacific Oil Cooler) and
> added a 90 degree oil filter adapter (it simply had screens prior) I
> went with the large filter (48109) and used a finned filter cover for
> heatsink. Had to also replace oil temp gauge with aircraft type due to
> probe thread diff.  Before changes,with the VDO automotive oil temp
> gauge it had read about 220 degrees in cruise--with the new stuff it's
> now reading 245. I pulled the oil temp probe out and tested it with hot
> water and a cooking thermometer. It was accurate. The two lines to the
> oil cooler both showed about 150 degrees when I infrareded them just
> after shutdown. I also tested the top of the oil cooler which read about
> 195 degrees 5 to 7 min after shutdown. Oil is not burnt and I still
> don't beleive it is running that hot. Some possible reasons--the probe
> is too short, it's a UMA probe and is only about an inch long, the stock
> engine probe on my Mooney was 4 inches long. Vernatherm?? I had tested
> it when it was out and it opened up nicely at about 180. Is anyone
> running without a vernatherm?? if so, where did you get the plug? The
> oil lines are different than what I was used to, one runs in just behind
> the oil cooler and the other is low on the accessory case on the pilot
> side. There's another plug just behind the oil cooler and to the left of
> the first oil line. Not sure what's correct but it's different than
> other 360s I've seen.
> To add a 2nd cooler, I was thinking of using the (fuel injection) ram
> air intake scoop to blow onto the 2nd cooler and simply put a K&N cone
> type filter onto the intake inlet for air filtration. Is there enough
> air in the engine compartment to feed the engine?? Where can I exhaust
> the hot air after passing over the 2nd oil cooler??
> Any help appreciated, thx Tom/Fort Myers
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