X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from zproxy.gmail.com ([64.233.162.207] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 989515 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 23:03:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.162.207; envelope-from=wdleonard@gmail.com Received: by zproxy.gmail.com with SMTP id 34so433489nzf for ; Wed, 08 Jun 2005 20:02:31 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:references; b=GeKEBi3pKOIwCylEHp8ZR/Hczf9yBOL0x40iCzbi5uo+aY+tAKcMX8Og4YS8hkuBvxVY88mft1KYNz41crgPkjywaLviAa5eqZFaiLbqFoGRG6wTtGgvryNe3RDR3vGUD+mwc5pJzR9yrrzg8ZzTEqpyRWkOzqMac3MZ0iCJ3DQ= Received: by 10.36.3.2 with SMTP id 2mr85674nzc; Wed, 08 Jun 2005 20:02:31 -0700 (PDT) Received: by 10.36.9.4 with HTTP; Wed, 8 Jun 2005 20:02:31 -0700 (PDT) Message-ID: <1c23473f05060820024295b892@mail.gmail.com> Date: Wed, 8 Jun 2005 20:02:31 -0700 From: David Leonard Reply-To: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Remaining pressure when cold (Re: coolant leak) In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5225_3550087.1118286151317" References: ------=_Part_5225_3550087.1118286151317 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 6/8/05, Russell Duffy <13brv3@bellsouth.net> wrote:=20 >=20 > >>>> You have a compression leak if.... <<<< > Very nice write-up Bill.=20 >=20 I agree bill, thanks. Dave, I've got to agree that I've never seen pressure after cool down on= =20 > any cooling system. Do you have something unusual about your system, like= =20 > two different pressure caps, or anything else that might make it behave= =20 > abnormally?=20 >=20 Yes, exactly, two pressure caps in series. The second tank is one qt and I= =20 keep it empty. The first tank is about a pint and I keep it full. First=20 pressure cap i s 13 psi, and second tank is 20. Pressure sensor (switch=20 only) is on the second tank.=20 The second tank acts as my air spring. (see other post) =20 > I believe the "normal" way to test for this is to use a coolant pressure= =20 > tester, or any other method you can devise to pressurize the system. I'm= =20 > thinking you could easily have a leak that allowed combustion pressure to= =20 > get through, but would never let coolant pressure through, particularly= =20 > pushing liquid.=20 > It would be easy enough to pressurize the coolant system to about 30 psi= =20 > and see if the coolant goes into your new turbo. Also, isn't there a test= =20 > you can do where you send a sample of coolant out to be tested for=20 > combustion gasses? That might be easier, and more likely to give a final= =20 > answer.=20 >=20 To test, I could remove the cap from my second tank and run the engine.=20 There should now be no pressure under cap number 1 after cool down. I will= =20 do that test in the near future....=20 I sure hope it's not leaking Dave. I guess this is another warning sign= =20 > that I'll never get with my zero pressure system, though if I blow too ma= ny=20 > bubbles, the low coolant light will come on.=20 > Cheers, > Rusty (zero pressure / ignorance is bliss) > =20 I am now running the Evans Coolant too, but I changed my system. the first= =20 cap is now zero psi and the second is still 16 psi. I imagine my over=20 pressure is less than 7-10 psi but it still allows me to check the system= =20 for leaks with the pressure sensor. --=20 Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/vp4skydoc/index.html ------=_Part_5225_3550087.1118286151317 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
On 6/8/05, R= ussell Duffy <13brv3@bellsou= th.net> wrote:

 >>>> You have a compression leak if..= .. <<<<

Ver= y nice write-up Bill.  
 
I agree bill, thanks.

 
Dav= e, I've got to agree that I've never seen pressure after cool down on any c= ooling system.  Do you have something unusual about your system, = like two different pressure caps, or anything else that might make it behav= e abnormally?  
 
Yes, exactly, two pressure caps in series.  The second tank is on= e qt and I keep it empty.  The first tank is about a pint and I keep i= t full.  First pressure cap i s 13 psi, and second tank is 20.  P= ressure sensor (switch only) is on  the second tank. =20
 
The second tank acts as my air spring.  (see other post)
 = ;
 
I b= elieve the "normal" way to test for this is to use a coolant= pressure tester, or any other method you can devise to pressurize the syst= em.   I'm thinking you could easily have a leak that allowed= combustion pressure to get through, but would never let coolant pressure t= hrough, particularly pushing liquid. =20
 
It = would be easy enough to pressurize the coolant system to about 30 psi and s= ee if the coolant goes into your new turbo.  Also, isn't there a test = you can do where you send a sample of coolant out to be tested for combusti= on gasses?  That might be easier, and more likely to give a final answ= er. =20
 
To test, I could remove the cap from my second tank and run the engine= .  There should now be no pressure under cap number 1 after cool down.=   I will do that test in the near future.... 

 
I sure hope it's not leaking Da= ve.  I guess this is another warning sign that I'll never get with my = zero pressure system, though if I blow too many bubbles, the low coola= nt light will come on. =20
 
Cheers,
Rusty (zero pressure / ignoranc= e is bliss)
 
 
I am now running the Evans Coolant too, but I changed my system. = the first cap is now zero psi and the second is still 16 psi.  I imag= ine my over pressure is less than 7-10 psi but it still allows me to check = the system for leaks with the pressure sensor.

--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a= /rotaryroster/index.html
http://members.aol.com/vp4skydoc/index.html
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