X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 29 Aug 2007 23:28:16 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2292182 for lml@lancaironline.net; Wed, 29 Aug 2007 18:16:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v38_r9.2.) id q.c96.179f505a (42809) for ; Wed, 29 Aug 2007 18:15:05 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Wed, 29 Aug 2007 18:15:05 EDT Subject: Re: [LML] TSIO-550 Engine fittings question X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1188425705" X-Mailer: 9.0 Security Edition for Windows sub 5373 X-Spam-Flag: NO -------------------------------1188425705 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 8/29/2007 4:35:43 P.M. Central Daylight Time, =20 rtitsworth@mindspring.com writes: Put this is the category of you don=E2=80=99t know what you don=E2=80=99t k= now=E2=80=A6 The=20 attached photo shows two fittings. The top one (actually two) is from the bottom of a TSIO0550 oil cooler wher= e=20 it feeds the turbo=E2=80=99s (for cooling) - at least that=E2=80=99s what w= as on my engine=20 and seems to reflect the diagram in the TCM manual. The bottom one is=20 functionally the same thing but is a single fitting that I got from a local= =20 hydraulic fitting supplier.=20 Is there a reason that TCM used two fittings when they could have got by=20 with one?=20 It appears the original(s) might be brass and steel (plated). I=E2=80=99ll= re-check=20 when I=E2=80=99m out at the hanger. The new/bottom one is steel (plated).=20= Perhaps =20 there is some issue with the steel fitting in the aluminum oil cooler housin= g=20 (galvanic/seizing), or perhaps they intend the brass fitting to be softer=20 when attempting to get it in/out (if it=E2=80=99s stuck), or ????=20 Anyone have any insight before I insert the new one? I was going this way=20 because I desired the shorter fitting for better hose clearance/alignment. Rick, =20 I don't know, but I love the torque wrench used on the top reducer fitting.= =20 Was it a calibrated pipe wrench or just the clamping pressure on the=20 vise-grips? =20 Here's something else I don't know - A single piece fitting that reduces a =20 tube connection has some interesting characteristics (bottom picture). If =20= the=20 flow is towards the pipe thread, turbulence is created after the hole ( =20 @#%^$#^%# with respect to fuel flow sensors). If the flow is towards the f= lared=20 end, the sudden restriction may have an adverse effect on the flow rate (le= ss=20 than that of a smooth pipe of the smaller side diameter of the reducer). O= n=20 the other hand, with the reducer/flare combo (top pic), the flow towards th= e=20 pipe thread side produces less turbulence as the line more gradually=20 increases in diameter thru the use of the fittings. And, if you have a thi= rd hand,=20 flow towards the flare end is more tapered and, perhaps, less adverse to th= e=20 flow. =20 In other words, I don't know if I don't know whether the bottom one is =20 functionally equivalent to the top one. =20 I hate Al-Al pipe fitting connections. Without a good lubricant/sealant,=20 galling of one or the other piece is highly possible. At least steel or br= ass=20 can only cause galling on the Al side (later able to be fixed with=20 Heli-coils). Oh, you call that seizing. Steel/Al doesn't seem to be a wor= risome=20 galvanic marriage since there are many engine parts that match up steel to=20 aluminum - sleeve in the head, valve seat inserts, valve guides, spark plug= s in=20 heli-coils, bolts holding the case halves together, etcetera, etc. =20 Now I don't know if I'm just having a bad day or I really don't know. =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Darwinian culling phrase: Watch This! ************************************** Get a sneak peek of the all-new AOL a= t=20 http://discover.aol.com/memed/aolcom30tour -------------------------------1188425705 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
In a message dated 8/29/2007 4:35:43 P.M. Central Daylight Time,=20 rtitsworth@mindspring.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000080 size= =3D2>

Put this is the= =20 category of you don=E2=80=99t know what you don=E2=80=99t know=E2=80=A6&nb= sp; The attached photo shows=20 two fittings.

The top one (ac= tually=20 two) is from the bottom of a TSIO0550 oil cooler where it feeds the turbo= =E2=80=99s=20 (for cooling) - at least that=E2=80=99s what was on my engine and seems to= reflect the=20 diagram in the TCM manual.  The bottom one is functionally the same t= hing=20 but is a single fitting that I got from a local hydraulic fitting=20 supplier.

Is there a reas= on=20 that TCM used two fittings when they could have got by with=20 one?

It appears the=20 original(s) might be brass and steel (plated).  I=E2=80=99ll re-check= when I=E2=80=99m=20 out at the hanger.  The new/bottom one is steel (plated).  Perha= ps=20 there is some issue with the steel fitting in the aluminum oil cooler hous= ing=20 (galvanic/seizing), or perhaps they intend the brass fitting to be softer=20= when=20 attempting to get it in/out (if it=E2=80=99s stuck), or=20 ????

Anyone have any= =20 insight before I insert the new one?  I was going this way because I=20 desired the shorter fitting for better hose=20 clearance/alignment.
Rick,
 
I don't know, but I love the torque wrench used on the top reducer=20 fitting.  Was it a calibrated pipe wrench or just the=20 clamping pressure on the vise-grips?
 
Here's something else I don't know - A single piece fitting that reduce= s a=20 tube connection has some interesting characteristics (bottom picture). = If=20 the flow is towards the pipe thread, turbulence is created after the hole (=20 @#%^$#^%# with respect to fuel flow sensors).  If the flow is towards t= he=20 flared end, the sudden restriction may have an adverse effect on the flow ra= te=20 (less than that of a smooth pipe of the smaller side diameter of the=20 reducer).  On the other hand, with the reducer/flare combo (top pic), t= he=20 flow towards the pipe thread side produces less turbulence as the line=20= more=20 gradually increases in diameter thru the use of the fittings.  And, if=20= you=20 have a third hand, flow towards the flare end is more tapered and, perhaps,=20= less=20 adverse to the flow.
 
In other words, I don't know if I don't know whether the bottom one is=20 functionally equivalent to the top one.
 
I hate Al-Al pipe fitting connections.  Without a=20 good lubricant/sealant, galling of one or the other piece is highly=20 possible.  At least steel or brass can only cause galling on the Al sid= e=20 (later able to be fixed with Heli-coils).  Oh, you call that=20 seizing.  Steel/Al doesn't seem to be a worrisome galvanic marriage sin= ce=20 there are many engine parts that match up steel to aluminum - sleeve in=20 the head, valve seat inserts, valve guides, spark plugs in heli-coils,=20 bolts holding the case halves together, etcetera, etc.
 
Now I don't know if I'm just having a bad day or I really don't know.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Darwinian culling phrase: Watch=20 This!



Get a s= neak peek of the all-new AOL.com.=
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