Today's Message Index:
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1. 04:05 PM - Re: Manifold Drain Lines (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
2. 05:03 PM - Re: Manifold Drain Lines (HBaker)
3. 05:18 PM - Re: Re: Manifold Drain Lines (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
Message 1
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| 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
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of HBaker
Sent: Friday, March 13, 2009 6:38 PM
Subject: M14PEngines-List: Manifold Drain Lines
--> <henry.baker@nf.sympatico.ca>
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
--------
Currently building a Murphy Moose - any help would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234498#234498
Message 2
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| 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! :D
--------
Currently building a Murphy Moose - any help would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234904#234904
Message 3
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| Subject: | Re: 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.
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of HBaker
Sent: Monday, March 16, 2009 8:03 PM
Subject: M14PEngines-List: Re: Manifold Drain Lines
--> <henry.baker@nf.sympatico.ca>
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! :D
--------
Currently building a Murphy Moose - any help would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=234904#234904
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