X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.177.160.85] (HELO smtp.gvtc.com) by logan.com (CommuniGate Pro SMTP 4.3.4) with SMTP id 989344 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 20:52:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.177.160.85; envelope-from=n5658z@gvtc.com Received: (qmail 16195 invoked from network); 9 Jun 2005 00:51:49 -0000 Received: from unknown (HELO CALAMOJA) (12.179.227.2) by smtp.gvtc.com with SMTP; 9 Jun 2005 00:51:49 -0000 Message-ID: <008f01c56c8d$6c22b690$796414ac@sales.americas.bmw.corp> From: "James Calamon" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Remaining pressure when cold (Re: coolant leak) Date: Wed, 8 Jun 2005 19:51:50 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_008C_01C56C63.832661E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_008C_01C56C63.832661E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageIn the auto industry (my last 35 years, too long) we use several = ways to check for combustion leaks. You can purchase a combustion leak = tester which has a liquid that you place into a clear plastic container = then inset into the coolant system cap/radiator cap and run the engine a = few minutes. The liquid reacts with carbon monoxide from the combustion = chamber and turns a different color. The second and longer time is to = place a system pressure tester on the system and apply pressure, you = want to do this with the spark plugs out if you have a combustion = cylinder leak the coolant will flow into the cylinder (rotor housing). = If bad enough coolant will leak out of the plug hole (BTW be sure and = turn the engine over after this test to flush and leaked coolant before = reinstalling the plugs and firing up again, coolant does not compress = and will break big parts). The third requires an exhaust gas reader and = requires running the engine with the coolant cap off and sniffing the = air just inside the coolant tank, be sure not to get coolant in the gas = analyzer as it will kill the unit. Hope this helps. BTW the first option = is probably the least expensive and would be something good to have in = your box of tools. Best Regards Jim Calamon N5658Z New Braunfles, Texas (BAZ) "People may fail many times, but they become failures only when they = begin to blame someone else" - Unknown http://gvtc.com/~n5658z/ ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Wednesday, June 08, 2005 6:42 PM Subject: [FlyRotary] Re: Remaining pressure when cold (Re: coolant = leak) >>>> You have a compression leak if.... <<<< Very nice write-up Bill. =20 Dave, I've got to agree that I've never seen pressure after cool down = on any cooling system. Do you have something unusual about your system, = like two different pressure caps, or anything else that might make it = behave abnormally? =20 I believe the "normal" way to test for this is to use a coolant = pressure tester, or any other method you can devise to pressurize the = system. I'm thinking you could easily have a leak that allowed = combustion pressure to get through, but would never let coolant pressure = through, particularly pushing liquid. =20 It would be easy enough to pressurize the coolant system to about 30 = psi and see 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 combustion gasses? That might be easier, and more likely to give a = final answer. =20 I sure hope it's not leaking Dave. 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 coolant light will come on. =20 Cheers, Rusty (zero pressure / ignorance is bliss) ------=_NextPart_000_008C_01C56C63.832661E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
In the auto industry (my last 35 years, = too long)=20 we use several ways to check for combustion leaks. You can purchase a = combustion=20 leak tester which has a liquid that you place into a clear plastic = container=20 then inset into the coolant system cap/radiator cap and run the engine a = few=20 minutes. The liquid reacts with carbon monoxide from the combustion = chamber and=20 turns a different color. The second and longer time is to place a system = pressure tester on the system and apply pressure, you want to do this = with the=20 spark plugs out if you have a combustion cylinder leak the coolant will = flow=20 into the cylinder (rotor housing). If bad enough coolant will leak out = of the=20 plug hole (BTW be sure and turn the engine over after this test to flush = and=20 leaked coolant before reinstalling the plugs and firing up again, = coolant does=20 not compress and will break big parts). The third requires an exhaust = gas reader=20 and requires running the engine with the coolant cap off and sniffing = the air=20 just inside the coolant tank, be sure not to get coolant in the gas = analyzer as=20 it will kill the unit. Hope this helps. BTW the first option is probably = the=20 least expensive and would be something good to have in your box of=20 tools.
 
Best Regards
 
Jim Calamon
N5658Z New Braunfles, Texas (BAZ)
"People may = fail many=20 times, but they become failures only when they begin to blame someone = else" -=20 Unknown
 
http://gvtc.com/~n5658z/
 

 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Wednesday, June 08, 2005 = 6:42=20 PM
Subject: [FlyRotary] Re: = Remaining=20 pressure when cold (Re: coolant leak)

 >>>> You have a compression leak = if....=20 <<<<

Very = nice write-up=20 Bill.  
 
Dave, = I've got to=20 agree that I've never seen pressure after cool down on any cooling=20 system.  Do you have something unusual about your system, = like two=20 different pressure caps, or anything else that might make it behave=20 abnormally?  
 
I = believe the "normal"=20 way to test for this is to use a coolant pressure tester, or any = other=20 method you can devise to pressurize the system.   I'm = thinking=20 you could easily have a leak that allowed combustion pressure to get = through,=20 but would never let coolant pressure through, particularly pushing=20 liquid. 
 
It = would be easy=20 enough to pressurize the coolant system to about 30 psi and see if the = coolant=20 goes into your new turbo.  Also, isn't there a test you can do = where you=20 send a sample of coolant out to be tested for combustion gasses?  = That=20 might be easier, and more likely to give a final answer. =20
 
I sure hope it's not leaking = Dave.  I=20 guess this is another warning sign that I'll never get with my zero=20 pressure system, though if I blow too many bubbles, the low = coolant light=20 will come on. 
 
Cheers,
Rusty (zero pressure / = ignorance is=20 bliss)
 


 
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