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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-675961@logan.com>
Subject: Re: [FlyRotary] Re: Oil Cooler Connections
Date: Sat, 20 Aug 2005 17:47:43 -0400
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Bob, my backward hooked cooler retains the thermostat and does not appear to 
hinder the oil flow.  Of course the only time it would open is when the oil 
is cold so that some oil would by pass the cooler and remain warm.  If you 
operate in frigid temperatures then you may want the thermostat to operate 
properly - but, I have flown with OAT in the teens (F) without any problem.

Ed


----- Original Message ----- 
From: "Bob White" <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, August 20, 2005 3:59 PM
Subject: [FlyRotary] Re: Oil Cooler Connections


Hi Thomas,

This may be a problem.  That's how I thought it was going to be when I
was thinking it went the other way, but now I would have to turn the
cooler upside down. Doing so will make the inlet hose stick out thru the
bottom of the cowl.  Very incovenient for routing the plumbing.
Mounting this oil cooler has been a major pain in the behind.  Come to
think of it, my biggest problems have been plumbing.

I may have to try it Ed's way and run the oil thru backwards if I can
convince myslef that I won't have a thermostat problem.

Bob W.


On Sat, 20 Aug 2005 14:17:59 -0500
"rijakits" <rijakits@cwpanama.net> wrote:

> Bob,
>
> just ot make sure, whatever position you mount the cooler, do it so that 
> any
> gas (trapped air, oil vapor, etc.) can be pushed out in FLOW-Direction, 
> not
> against it. Also make sure that the outlet is at the highest spot, even if
> you have to mount the cooler a little crocked (un-estetic, but works!).
> I remember some 20 years back BMW started to offer oil-coolers on their
> bikes. Lots of them had trouble with oil-temp after oil-changes:
> Oil would drain out of the cooler - oil-pump starts to load the cooler and
> in the process trapps a good amount of air - inlet and outlet where facing
> down for more estetic oil line routing (or cheaper, shorter lines :)).
> Easiest fix was to mount the cooler up-side down, get 180º fittings and
> mount the cooler lower so the orignal lines would fit - no more trapped 
> air
> as it was pushed out the outlet as the cooler filled up.
> I believe the coolers were single pass.
>
> Thomas J.
>
>
> ----- Original Message ----- 
> From: "Bob White" <bob@bob-white.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Saturday, August 20, 2005 1:25 PM
> Subject: [FlyRotary] Re: Oil Cooler Connections
>
>
> > Thanks Ed (and Al also),
> >
> > I was just writing a reply to Al give a little more detail, but his
> > observation seems to have been correct.  I thought the nut on the
> > bottom might have something to do with the thermostat that I thought
> > the stock Mazda coolers had.  Did you remove or disable the thermostat
> > or, am I mistaken in thinking it has one?
> >
> > One other question that concerns me a little, I was told by Racing Beat
> > when I ordered the AN adaptors, that the Mazda cooler had a 16 MM and
> > an 18 MM fitting like the front and rear covers.  This cooler (from
> > Bruce T.) has two 18 MM threads.  Does the manual mention the thread
> > sizes?
> >
> > Bob W.
> >
> >
> > On Sat, 20 Aug 2005 14:12:51 -0400
> > "Ed Anderson" <eanderson@carolina.rr.com> wrote:
> >
> > > Bob,   I just checked the Mazda manual and it clearly shows the inlet
> (oil
> > > from engine oil pump) is the top fitting and outlet (to inlet on rear
> > > housing)  the side fitting.  Now for what its worth I mistakenly 
> > > hooked
> mine
> > > up as your labels indicate - then later realized my mistake - but, 
> > > since
> the
> > > oil temps and pressures were fine, I never changed it to the correct
> > > direction.
> > >
> > > Ed
> > >
> > >
>

-- 
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