[C38] engine temp

[Les]

Hi, everyone,

	I don't want to appear stupid, but I am.  

	Diesel engines are basically heat engines.  Most are designed to run at
some temperature range.  If they don't get to that range, they become
very "dirty", with carbon and so forth, including poor combustion and
greater nasty air products.  Does anyone have any information about what
the "design" temp was for the original engines (I have an XP-25B in JACE
now and it came with a larger heat exchanger, but that is no indication,
as the engines internals will determine how much cooling is right.)  If
the thermostat is working right, the engine should maintain the right
temperature I think, but I don't know for sure.  The mechanical
thermostats are in essence a two element spring that holds them closed,
with a waxy cap that will solidify when the engine is cold to keep it
shut until the engine warms up enough to run right.  These thermostats
are really simple, but a vital piece of equipment for a diesel.

Regards,
Les H
On Mon, 2009-08-31 at 08:22 -0400, Tom T. wrote:
>  
> Ditto,
>  
> This sounds like my own experience.  That little original 2" heat
> exchanger has to go to the Davy Jones locker for good!
>  
> Tom Troncalli
> Renata #95 
> 
>  
>         ----- Original Message ----- 
>         From: Steve Smolinske 
>         To: Catalina 38 Listserve
>         Sent: 8/31/2009 2:33:21 AM 
>         Subject: [C38] engine temp
>         
>         
>         fyi
>          
>         as a follow up to earlier discussions on engine cooling, I
>         replaced the 2" x 16" heat exchanger with a 3 x17 and dropped
>         30 degrees off of my normal operating temp.  went from 190 to
>         160 under way. With the larger exchanger I was also able to
>         step up to 5/8 from 1/2 hose from the raw water pump to the
>         exchanger.  Im amazed at how much smoother, quieter and less
>         labored the engine sounds now.
>          
>         Steve
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