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06-08-2011, 10:49 AM
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#1
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Senior Member
Alpine Owners Club
Join Date: Jan 2006
Location: West Covina, Ca 91791
Posts: 123
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Engine Compartment Airflow
Has anyone added additional ventilation to the engine compartment? If so, how have you accomplished the added ventilation.
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Dennis And Sally
2005 40FDQS
ACA & SoCal
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06-08-2011, 10:53 AM
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#2
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Senior Member
Alpine Owners Club
Join Date: Sep 2005
Location: Traveling in North America
Posts: 2,248
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Why are you adding extra ventilation to the engine compartment?
Barb
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Barbara & David O'Keeffe
Figment II (Alpine 2002 36 MDDS)
On The Road since 2006
Blog
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06-08-2011, 10:59 AM
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#3
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Senior Member
Alpine Owners Club
Join Date: Jan 2006
Location: West Covina, Ca 91791
Posts: 123
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To reduce the engine compartment heat will driving. This should also reduce the engine temp load on the radiator.
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Dennis And Sally
2005 40FDQS
ACA & SoCal
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06-08-2011, 11:32 AM
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#4
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 5,932
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Our dealership had 6 lots. They sent all the motorhomes to atlanta for overheating problems that the other lots could not fix. I guess they thought that my having a pilots license and retiring from the airline, I knew a little bit about airflow. the other lots had already changed thermostats. cleaned radiators, replaced rad. caps and replaced the water pumps and fan clutches. most of the coaches were repaired with a simple air deflector. I would buy a front door kick panel or just a sheet metal panel, about 8x36 in. I would install this just in front of the radiator, under the frame.the back was flush with the frame and the front had a 5 in. spacer. This created a scoop that steered the cool air up to the radiator. The reasoning was that air going under the frame was sucking the air in front of the radiator away. Remember you have a radiator and several baffels, that are slowing air down in front of the radiator. That air is looking for some place to go and will go down in front the radiatorand underneah the motorhome if allowed too. Of course this only works on front engines and radiators.
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1998 Pace Arrow 35 ft. F53 Ford V10 2014 Honda CRV toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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06-08-2011, 11:41 AM
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#5
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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GA Traveler--Two words: "side-mounted radiator", or is that three words. Anyway, do a search on the forum, a few have added vents [cut holes/added grills] to the engine access door. Save for fan controller issues, have not seem any posts of over heating engines. Apparently, the Apline's cooling capacity and the Cummins 400 are a good match. Some folks do open the engine access door upon parking for the evening to speed cool down--suppose you could run with the access door open on really hot days but think you are tinkering at the edges here.
PS--Very early Alpines had hydraulically actuated, temp controlled engine access doors--not sure how it worked but concept was soon discontinued.
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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06-08-2011, 07:45 PM
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#6
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Senior Member
Join Date: Aug 2004
Location: Camarillo, CA
Posts: 466
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Have you ever been under the engine compartment when the fan is running? The amount of air it pulls through is very impressive. I doubt that you can push more through the engine compartment without some major changes. However, if I were going to try, I would first look at changing the side louvers in front of the rad. Angle them to catch the air as you travel down the road and let them stick out beyond the air/coach boundry layer to "grab" more air.
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Steve
'19 Renegade Verona VSB
'05 Jeep Liberty
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06-08-2011, 10:17 PM
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#7
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Senior Member
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,385
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Best reason for adding engine compartment ventilation is keeping the bedroom area cooler during long summer drives.
Ed Meadows cut four of these louvered vents into his rear hatch, in two lines of two, above and below the mid-height stiffener. They fit well and look good. His bed-pedestal carpeting glue was coming undone. IIRC he reported ~15 degrees or so cooler on the bed frame after a long drive. He said no difference on engine temp, but bedroom was way cooler. He also said the vents themselves get too hot to touch while on a long drive.
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Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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06-09-2011, 08:26 AM
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#8
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Senior Member
Join Date: Jan 2004
Location: Summer Rowlett TX (Why?)/Winter Palm Springs CA Two Springs RV Resort https://www.twospringsrv.com/
Posts: 526
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Engine compartment vents
Always looking for ideas & innovations, I took pictures of vents on Swan's & another coach at Desert Rat X.
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Basil & Sue Shannon
Former Apex owner (Gary & Renee have it now)
Was Traveling Circus (2 clowns/Sage the Wonder Dog) Tent rotted. Circus folded.
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06-09-2011, 10:45 AM
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#9
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Senior Member
Alpine Owners Club
Join Date: Jan 2006
Location: West Covina, Ca 91791
Posts: 123
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Thanks Basil and Emike.
Basil you pics are exactly what I was looking to find. Mike, I will most likley install 4 of the vents from West Marine.
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Dennis And Sally
2005 40FDQS
ACA & SoCal
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06-09-2011, 02:46 PM
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#10
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Senior Member
Join Date: Nov 2007
Location: Charleston, WV
Posts: 3,469
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As mentioned, earlier coaches like mine had hydraulically operated engine doors (not temperature controlled though) and so I open mine slightly when traveling in hot weather to keep the bed cooler. You could just leave the door completely open but the louvers look a lot neater
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John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD
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