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Manifold Drain Lines

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Fri Mar 13, 2009 2:37 pm Post subject: Manifold Drain Lines

Hi Guys



Can anyone tell me what size lines are used on the manifold Quick drain lines, 1/8 or 1/4?



Henry



Moose # 294

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_________________
Currently building a Murphy Moose - any help would be appreciated.

mark.bitterlich(at)navy.m
Guest

Posted: Mon Mar 16, 2009 3:05 pm Post subject: Manifold Drain Lines

Henry, I assume you are talking about the intake manifold drains lines used

on the lower 3 cylinders?  



Typically these systems use AN#4 fittings.  Some people have used hard

Aluminum lines to connect everything together.  I would recommend against

this because every system I have seen that does it that way eventually

cracks these lines due to engine vibration and then you end up with a intake

air leak which can be really insidious to find.    



Instead use AN-4 fittings with steel braided flex hose.  Suggest hose such

as this: 



http://www.hrpworld.com/index.cfm?tpc=Aeroquip_AQP_Stainless_Steel_Braided_R

acing_Hose&form_prod_id=614,600_331&action=product



Typical AN#4 braided hose has a .22 ID and a .44 OD.  



Best Regards, 



Mark Bitterlich





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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Mon Mar 16, 2009 4:03 pm Post subject: Re: Manifold Drain Lines

Hi Mark



Yes ,I was referring to the manifold drain lines , thanks for the info, theirs nothing like some one who has already been down the road.



Thanks very much Mark!

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Currently building a Murphy Moose - any help would be appreciated.

mark.bitterlich(at)navy.m
Guest

Posted: Mon Mar 16, 2009 4:18 pm Post subject: Manifold Drain Lines

Yep, you guessed correctly.  I used to use hard aluminum lines.  Yep,

one cracked.  Yep, it took awhile to realize what was going on with the

engine!  Yep, I immediately switched to braided steel flexible lines.  



Take care, 



Mark



P.S.  Here's a little hint.  Leave the intake manifold drain valve OPEN

during engine priming.  Reach in the cockpit and INTENTIONALLY

over-prime the engine. Don't go nuts here... Say about 10-12 strokes of

the primer.  The excess fuel SHOULD come out the intake drain.  If it

does not, do not start your engine, you have oil backed up in those

drain lines, and you also might have oil IN THE INTAKES that you do not

want to suck into the cylinder!  



After doing this... Assuming fuel does come out the drain.. Look

carefully at all the lines and fittings in the system for fuel leaks.

I.E., It is hard to see anything coming out of these lines with the

engine running.  It IS EASY to see fuel coming out of these lines and

fittings when you over-prime the engine and one is cracked or loose,

etc.  



Lastly, after doing this, always gently pull the engine through making

sure you don't have any kind of hydraulic lock from the over-prime fuel

in a cylinder itself.  This has never happened to me, but it is indeed

possible if you go nuts with the priming and happen to have an intake

valve open!  As in.. I am saying this to cover my ass.   



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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Tue Mar 17, 2009 3:32 am Post subject: Re: Manifold Drain Lines

Thanks again Mark



  Once again, I hope I can learn from others as  these mistakes could ruin my fishing trip! Thanks again for taking the time responding to my Question.



Henry

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yakplt(at)yahoo.com
Guest

Posted: Tue Mar 17, 2009 3:48 pm Post subject: Manifold Drain Lines

Anytime.  My pleasure.  

  

 Mark

  

 

 

 

   From: HBaker <henry.baker(at)nf.sympatico.ca>

To: m14pengines-list(at)matronics.com

Sent: Tuesday, March 17, 2009 7:32:31 AM

Subject: Re: Manifold Drain Lines



--> M14PEngines-List message posted by: "HBaker" <henry.baker(at)nf.sympatico.ca (henry.baker(at)nf.sympatico.ca)>



Thanks again Mark



  Once again, I hope I can learn from others as  these mistakes could ruin my fishing trip! Thanks again for taking the time responding to my Question.



Henry



--------

Currently building a Murphy Moose - any help would be appreciated.





Read this topic online  here:



http://forums.matronics.com/viewtopic.php?p=234952#234952



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Claytonfly(at)comcast.net
Guest

Posted: Tue Mar 17, 2009 5:51 pm Post subject: Manifold Drain Lines

The Kimball's down in Florida have a system all readily developed. It uses

stainless lines and a quick drain. I just installed one on my Pitts 12

project and it went in good.



John Clayton



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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Sun Apr 05, 2009 4:02 pm Post subject: Re: Manifold Drain Lines

Thanks Mark  



 I used an fittings, and all stainless steel braid lines and it worked perfectly the swivel female to female can be bought at any hydraulic shop !!



 Thanks again



Henry

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mark.bitterlich(at)navy.m
Guest

Posted: Mon Apr 06, 2009 2:08 pm Post subject: Manifold Drain Lines

The swivel fitting is a nice touch!  



Mark Bitterlich

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