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Mike,
Thanks for the information. All of this was
completely unknown to me. I have changed the oil
cooler once with only a slight improvement and then
just a couple of weeks ago the temps jumped 20 degrees
on a day when the OAT was 71F. I think I have a
problem and I am currently applying bandaid fixes. My
warranty has expired so don't know if contientental
will give me another cooler of if I will have to
purchase another that might not work any better based
on what you are telling me. Do you have any
suggestions?
I am not using my oil door either and my CHTs are 360
or less.
Has TCM indicated any willingness to work with "N"
owners with this problem?
I will be going to the Lancair flyin in Texas. Will
be leaving here on the 11th I believe. We have a room
booked already. If you are going that way, I would
like fly along side just to compare some numbers.
Art
--- MikeEasley@aol.com wrote:
> The TCM #654580 "G" cooler will fit the "N". That
> cooler has at least 6 TCM
> part numbers and has been used for over 20 years on
> many different engines
> including the TSIO-550 which runs fairly cool oil
> temperatures from what I
> understand. I'm sure the reason all Continental
> powered Lancairs have an oil
> door is because the "G" cooler works too well.
>
> That's not true for many of the TCM #654585 "N"
> coolers. My oil door is on
> the shelf. I get 200-205 oil temps in cruise when
> my CHT's are around
> 340-360. Interestingly, my oil temp was right
> around 180 for the first 35 hours
> and then shot up 25 degrees. My guess is a small
> internal leak developed that
> caused some portion of the oil to bypass the cooling
> fins. Some coolers leak
> worse than others, some don't leak at all.
>
> This theory is based on several conversations with
> an oil cooler engineer
> who was reverse engineering the "N" cooler for PMA
> approval. He said the way
> the coolers are assembled left a lot to be desired
> and their own design would
> eliminate the potential weakness.
>
> I know of at least one ES guy who was running high
> oil temps and got a
> replacement cooler from TCM and is running at 180
> now. Another ES guy who bought
> a Positech and is running at 180 now. Another ES
> guy has gone through a
> couple coolers with no improvement. TCM won't
> change models of coolers on a
> warranty, Ron G. is right, they would have to create
> a whole new engine model to
> do that, not going to happen.
>
> Mike Easley
>
>
>
> ************************************** Get a sneak
> peek of the all-new AOL at
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