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09-30-2010, 08:49 PM
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#41
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Senior Member
Join Date: May 2006
Location: Houma, LA
Posts: 886
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Quote:
Originally Posted by RussWhite
Tuga,
Thanks - Is all this air that goes in somehow forced through the radiator before it all ( hopefully ) leaves through the duct work at the bottom?
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Russ,
I am not really qualified to answer that, but here goes. Yes, I would assume that the hot water in the engine travels into the radiator when the thermostat opens and allows it to enter. Then, the cool air is blown around the radiator tubes and directed across them by the fins. This air cools the tubes and the water inside of them. The heat that is given off is removed by the movement of air and is exhaused out of the bottom of the compartment.
I never completely understood why Newell doesn't put a fan in front of the radiator to draw the air across the fins. I'm sure they have a good reason though.
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Tuga & Karen Gaidry
1999 Newell 45 w/2 slides
Coach #512
2005 Pilot
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09-30-2010, 09:02 PM
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#42
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Senior Member
Join Date: Sep 2008
Location: Thibodaux, LA
Posts: 1,221
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Looks like the generator compartment is pressurized by the squirrel cage blower. The only outlet is through the radiator then ducted (in front of) out through the bottom. I was surprised also when I first looked at my genny and there was no radiator fan.
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09-30-2010, 09:30 PM
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#43
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Senior Member
Join Date: Mar 2006
Location: Indiana
Posts: 424
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I did a little research before modifying the cooling system on my '78 Newell. The issue is noise suppression. The more turns the cooling air makes going in and coming out the less engine noise that is able to escape the "box".
The squirrel cage fan helps in three respects. It allows for a lot more air movement with less noise than a typical engine fan, eliminates a direct path through to the box, and by "packing cool air into the box some of the surface heat of the engine is exhausted throught the radiator and out the bottom.
I was able to dramatically reduce the gen noise outside of my '78 by adding metal-work around the perimeter of the radiator to seal it to the front of the box, then I closed off the traditional grill and modified the front cover so that it drew air in from below the front bumper instead of directly in the front.
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1993 Newell 45'#316, 1976 Trans Am 455, 1967 GTO, 1953 Chevrolet 3105 (panel truck),1952 Chevrolet 3600,1969 Airstream Overlander. Always fixing something!
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10-01-2010, 12:55 AM
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#44
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Senior Member
Join Date: Feb 2008
Location: Riverside, California
Posts: 1,543
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I have a fan on mine that pulls air through the radiator, and yes, it is loud if you are outside near the front of the coach. Inside it is not that noticeable. Driving, of course, you don't hear it at all. The compartment surrounding the genset is not sealed, and is open on the bottom, front and rear...top and sides have insulation.
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10-02-2010, 12:22 AM
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#45
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Senior Member
Join Date: Mar 2007
Location: mesa, az
Posts: 1,375
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i did check mine and i have a small air leak on the bottom 4-6 inchs on both verticle sides. not enough to matter i dont believe but i will play with it some when i get home.
tom
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10-16-2010, 04:27 PM
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#46
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Senior Member
Join Date: Jan 2010
Posts: 346
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I checked mine also and have a very small leak at the top two corners. Otherwise it is tight all other places. The amount of air exhausted in the proper location is very impressive. Thanks for making me aware of this potential problem. Russ
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