Return-Path: Received: from fed1rmmtao07.cox.net ([68.230.241.32] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3149657 for flyrotary@lancaironline.net; Tue, 06 Apr 2004 20:29:00 -0400 Received: from smtp.west.cox.net ([172.18.180.53]) by fed1rmmtao07.cox.net (InterMail vM.6.01.03.01 201-2131-111-101-20040311) with SMTP id <20040407002859.NCK3433.fed1rmmtao07.cox.net@smtp.west.cox.net> for ; Tue, 6 Apr 2004 20:28:59 -0400 From: To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: idle speeds Date: Tue, 6 Apr 2004 20:28:58 -0400 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=____1081297738382_Z0GPMX13=j" Message-Id: <20040407002859.NCK3433.fed1rmmtao07.cox.net@smtp.west.cox.net> This is a multi-part message in MIME format. ------=____1081297738382_Z0GPMX13=j Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Thanks for the input rusty. You are very right about other eyes. Every interested pair of eyes on the field has taken a look including 2 A&P and a couple other rotary enthusiasts. There don't seem to be any problems staring me in the face. I don't have it on this computer, but I did post a pic of my pump. Nothing special. I just lopped off the thermostat area from the first coolant sensor outward and had someone weld over the thermostat bypass then weld on a plate to which I bolt an AN-16 Fitting. This AN-16 fitting goes to the top of the RAD. An AN-20 fitting comes out of the bottom of the rad back up to the pump intake. The Turbo is plumbed via the stock water supply on the intake manifold, then goes to the drain fitting on the bottom of the RAD. The surge can is hung on the PSRU and is connected to the small water outlet on top of the Rear side housing. This is a small surge can with a 16# or 20# cap. Overflow from this can goes to two medium sized (1 qt each) cans hung in series on the firewall. I can put a cap on the last on of those to create an "air spring." I put a 30# cap on the radiator to effectively seal it off, But I can use that cap to make sure Air is purged from the rad. I will make a drawing if this dosen't paint a clear picture. You guys have the best eyes for solving this kind of problem. Its really your input I need. In fact, I will make a drawing now. Thanks, Dave Leonard ------=____1081297738382_Z0GPMX13=j Content-Type: text/html; name="reply" Content-Disposition: inline; filename="reply" Message
I still have good compression all around, I just need to replace the water o-rings.  I am going to use the TES o-rings.  But even that won’t help if I can’t solve this damn circulation problem.  I am really at whit’s end.  There is no reason I shouldn’t be making coolant go round and round. 
 
 
Hi Dave.  I'm really sorry to hear about the toasted o-ring.  Hopefully, you can get it all back together soon.  
 
As for the coolant problem, the best thing I can suggest is to get another set of eyes to look at this.  As you well know, the cooling system just isn't that complicated, but it's still possible that you're overlooking something.  I couldn't count the number of times I've traveled to a scanner that's been down for days, only to find that the site engineer has repeatedly overlooked something simple.  It's usually something so simple that we mentally take it for granted as being OK.  I think of this as the brain playing a practical joke on us.  Ever look for something you know you had in your hand just a minute ago, search the room over, and find it on the desk right in front of you.  I'm convinced that my brain has a sense of humor all it's own. 
 
I guarantee, we have enough folks on this list to get your coolant problem resolved.  For starters, how about posting a picture of your water pump housing that shows all the modification that was done to it.  I would still suspect that something is wrong with the way it was modified. 
 
Before you take off the pump, can you rig a large pulley on a drill, so you can drive the pump without running the engine?  You should be able to have someone run the pump, while you disconnect hoses at various points in the system to prove that you have flow.   
 
Good luck,
Rusty (Philips cut off my network access in seconds, but will need two weeks to restore it... sigh)   

 

 

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