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| Re: [GMCnet] Bilge Blowers to Evacuate Engine Compartment [message #96822 is a reply to message #96779] |
Sun, 22 August 2010 16:03   |
Ken Coit
Messages: 151
Registered: November 2005
Karma: 0
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Thanks Jim, that is what I was looking for. Do you think the horizontal run
makes a difference at a standstill?
On Sun, Aug 22, 2010 at 10:37 AM, <dennisfsexton@aol.com> wrote:
>
>
> Arch had this in his photo album..
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=1652&cat=4293
>
>
> Dennis Sexton
> Germantown, TN
> USA
>
>
>
> -----Original Message-----
> From: Ken Coit <ktcoit@gmail.com>
> To: gmclist <gmclist@temp.gmcnet.org>
> Sent: Sun, Aug 22, 2010 8:58 am
> Subject: [GMCnet] Bilge Blowers to Evacuate Engine Compartment
>
>
> Can anyone give me a link to a picture of how the bilge blowers are mounted
> nd plumbed to pull hot air out of the engine compartment? I have tried to
> o avail and I am sure they are out there somewhere.
> Thanks.
> -
> en Coit, ND7N
> aleigh, NC
> arfait Royale
> 978 Royale Rear Bath, 403, 3.07
> ______________________________________________
> MCnet mailing list
> ist Information and Subscription Options:
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> _______________________________________________
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>
--
Ken Coit, ND7N
Raleigh, NC
Parfait Royale
1978 Royale Rear Bath, 403, 3.07
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| Re: [GMCnet] Bilge Blowers to Evacuate Engine Compartment [message #96846 is a reply to message #96770] |
Sun, 22 August 2010 17:40 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| Ken Coit wrote on Sun, 22 August 2010 09:58 |
Can anyone give me a link to a picture of how the bilge blowers are mounted
and plumbed to pull hot air out of the engine compartment? I have tried to
no avail and I am sure they are out there somewhere.
Thanks.
--
Ken Coit, ND7N
Raleigh, NC
Parfait Royale
1978 Royale Rear Bath, 403, 3.07
_
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Ken,
Let me tell you of my experience with a bilge blower in the motor compartment. I had heard a lot of stories about excessive heat in there and decided to install a bilge blower. I installed it by the distributor where I figured the heat would be the worst. I also installed a sensor that would turn the blower on when it got to 170 degrees. For three years the fan never turned on, then I had a rebuilt transmission installed that was rebuilt by a company that rebuilds engines poorly. It would not shift into low unless I forced it in. I took it back and insisted on another one although they said it was not a problem. The next one worked for about 3,000 miles and on our way to Bean Station for a Dixielander rally going up a small grade I noticed smoke behind us and pulled over. My wife handed me the fire extinguisher and I rushed out to use it underneath the driver side of the engine compartment. So far so good. I went in the coach and opened the engine hatch and found all my wiring in the engine compartment nothing but copper wire. The sensor that had never come on did with the fire and sucked the fire up over the engine and burned up all the wiring. Turned out the rebuilt transmission self destructed, blew the vent hose off and had sprayed transmission fluid onto the hot exhaust and caused the fire. Fortunately when I got up from using the extinguisher I was faced with a big American LaFrance fire engine and 5 firemnen. They checked the coach out and even crawled under it to make sure the fire was out. When I went back to get into the coach there was a policeman standing there and wouldn't leave until the wrecker came about 3 hours later.
The transmission was a total loss. Good Tennessee civil servants.
So I recommend never put a bilge blower in the engine compartment.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] Bilge Blowers to Evacuate Engine Compartment [message #96849 is a reply to message #96846] |
Sun, 22 August 2010 17:52 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Ken, The P.P.O. put a bilge (axial type) in my GMC's engine compartment. It pulls from the right rear of the engine compartment, and exhausts out a section of 4" flex dryer hose thru the vent ports that he installed on each side of the coach. The first time this fired off, I was pumping gas and the hot air hit me. A surprise introduction to the fan system. He had an elaborate system of relays and heat sensors that turned the blower on and off. He installed an additional sensor that activated a Halon fire extinguisher, aimed at the engine, mounted inside the engine compartment.
I removed everything electrical. The Halon is controlled by a heat sensitive strip. I installed a separate switch for the driver to control the axial blower. Works for me.
Tom Phipps,
75 GMC Ex-Avion
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Bilge Blowers to Evacuate Engine Compartment [message #96881 is a reply to message #96770] |
Sun, 22 August 2010 21:22 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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Looking at Arch's pictures, he may have had a good idea by running the reverse fan in front of the radiator. Something that you turn on when you need is not a bad idea if you have trouble with excess heat in the engine bay. You could probably hook up a mechanical timer switch to automatically turn it off after a while so you don't forget and leave it on.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] Bilge Blowers to Evacuate Engine Compartment [message #96907 is a reply to message #96887] |
Mon, 23 August 2010 09:21 |
Ken Coit
Messages: 151
Registered: November 2005
Karma: 0
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Senior Member |
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Thanks guys. I agree that a thermostatically controlled fan is a bad idea
unless it has controls that keep it from fanning a fire. I am not looking
for additional engine cooling, just a way to keep the carb from boiling fuel
while I wait for my change at a toll booth or use a rest stop. A source of
cool air, an exhaust fan, and a timer seems ideal. Maybe just a snorkel for
the air cleaner horn could do it, with a loose fit it would bring cool air
into the compartment and feed the carb, maybe it would even give the carb
enough thermal inertia to avert boiling altogether.
On Sun, Aug 22, 2010 at 11:34 PM, Kosier <gkosier@roadrunner.com> wrote:
> George,
>
> Arch actually did add a timer that started the fan when he shut
> the engine down. A really slick idea would be to use a
> double pole-double throw switch to reverse the direction of the
> fan to cool the AC condenser when idling in traffic.
>
> Gary Kosier
> 77EII & 77PB
> Newark, Ohio
>
> ----- Original Message -----
> From: "George Rudawsky" <GeorgeRud@aol.com>
> To: <gmclist@temp.gmcnet.org>
> Sent: Sunday, August 22, 2010 10:22 PM
> Subject: Re: [GMCnet] Bilge Blowers to Evacuate Engine
> Compartment
>
>
> >
> >
> > Looking at Arch's pictures, he may have had a good idea by
> > running the reverse fan in front of the radiator. Something
> > that you turn on when you need is not a bad idea if you have
> > trouble with excess heat in the engine bay. You could probably
> > hook up a mechanical timer switch to automatically turn it off
> > after a while so you don't forget and leave it on.
> > --
> > George Rudawsky
> > Chicago, IL
> > 75 Palm Beach
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Ken Coit, ND7N
Raleigh, NC
Parfait Royale
1978 Royale Rear Bath, 403, 3.07
_______________________________________________
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