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Date: Thu, 23 Aug 2007 07:40:02 -0400
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From: Art Jensen <flycassutts@yahoo.com>
Subject: Re: [LML] Re: high oil temps
In-Reply-To: <list-2278211@logan.com>
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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 
> http://discover.aol.com/memed/aolcom30tour
> 


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