Home » Public Forums » GMCnet » Engine vents (Engine heat)
| Engine vents [message #351546] |
Thu, 23 January 2020 15:27  |
thigh19
Messages: 92
Registered: July 2019
Location: Vancouver Wa
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I've seen a few of these with engine vents on the side. Is there a standard placement where these go? Or is it just chance? Any help or guidance will be appreciated. I purchased a set of stainless vents, for a boat, I plan on using.
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| Re: Engine vents [message #351556 is a reply to message #351546] |
Thu, 23 January 2020 21:40  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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My evaluation is they let SOME convective heat soak out at shutdown. However., the square inches compared to radiator area is inconsequential. The biggest problem is the step intrusion because of this about 50% of the vent is not functional at all. (Blocked) ,Though hot air comes out, this is AFTER the radiator it does not lower engine temp.
John Lebetski
Woodstock, IL
77 Eleganza II
[Updated on: Thu, 23 January 2020 21:41] Report message to a moderator |
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| Re: Engine vents [message #351557 is a reply to message #351556] |
Fri, 24 January 2020 06:07 |
6cuda6
Messages: 975
Registered: June 2019
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I think theses vents might work pretty good if you had an electric radiator fan and you had it on a timer to run for "X" minutes after the engine shut off to help cool down the engine bay....statically i dont think they do much either JMHO.
JohnL455 wrote on Thu, 23 January 2020 22:40My evaluation is they let SOME convective heat soak out at shutdown. However., the square inches compared to radiator area is inconsequential. The biggest problem is the step intrusion because of this about 50% of the vent is not functional at all. (Blocked) ,Though hot air comes out, this is AFTER the radiator it does not lower engine temp.
Rich Mondor,
Brockville, ON
77 Hughes 2600
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| Re: Engine vents [message #351558 is a reply to message #351546] |
Fri, 24 January 2020 09:33 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Effectiveness not withstanding, you asked about location. Maybe the following photo will help:
http://www.gmcmhphotos.com/photos/mechanical/p34779-dodge-front-wheels.html
The PO installed vents on my coach are as high and as far back as they can be given the location of the step, etc inside the body.
In the Summer, a LOT of heat comes out of them when I am stopped, I don't have any way to tell how much when underway.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: Engine vents [message #351562 is a reply to message #351558] |
Fri, 24 January 2020 16:02 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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On my first GMC, Some one along the way, added two engine vents to the sides. They were both open to the interior of the coach, but the driver's side had an extra special function. Whomever had installed an axial fan, aimed to exhaust engine hot air out thru the vent. It had an elaborate system of relays and thermostats designed to engage the fan at certain temps and to disable the fan in case of fire.
I removed the relay system and went to a simple dash switch. When you flipped the switch, you could actually see the temperature gauge drop. I felt that the switch gave me better control than betting on someone else's design without documentation.
Looking into the placement of the vents, they were lower than the plywood floor, not intruding into the passenger compartment.
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Engine vents [message #351727 is a reply to message #351725] |
Thu, 23 January 2020 17:12 |
Dave Stragand
Messages: 307
Registered: October 2017
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Along the same lines, I picked up a set of 1980-1981 Camaro Z28 'air
extractor' vents I was thinking of using. Has anyone used these on
their coach? They look like these:
https://www.jegs.com/i/OER/691/K8081/10002/-1. The hole is mounted
towards the front of the vehicle, so airflow works to suction out the
air.
-Dave
1978 Transmode near Pittsburgh
On Thu, Jan 23, 2020 at 1:28 PM Thom High via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I've seen a few of these with engine vents on the side. Is there a
> standard placement where these go? Or is it just chance? Any help or
> guidance will
> be appreciated. I purchased a set of stainless vents, for a boat, I
plan
> on using.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Engine vents [message #351728 is a reply to message #351727] |
Thu, 23 January 2020 20:34 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Here is the link to the Engine Air Vents that Jim K sells. This is the
most common style used on the GMC motorlhome.
https://www.gmcrvparts.com/product-p/g14881.htm
http://www.gmcrvparts.com/v/vspfiles/images/side_vents.pdf
A word of wisdom here, The Applied GMC website has a ton of information in
the instructions area. Go look and see!
https://www.gmcrvparts.com/category-s/158.htm
Regards,
J.R. Wright
GMC Great Laker
GMCGL Tech Editor
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 29.5' Stretch
75 Avion (Under going Frame up Restoration)
On location in Tucson (I don't do winter)
On Thu, Jan 23, 2020 at 4:13 PM Dave Stragand via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Along the same lines, I picked up a set of 1980-1981 Camaro Z28 'air
> extractor' vents I was thinking of using. Has anyone used these on
> their coach? They look like these:
> https://www.jegs.com/i/OER/691/K8081/10002/-1. The hole is mounted
> towards the front of the vehicle, so airflow works to suction out the
> air.
>
> -Dave
>
> 1978 Transmode near Pittsburgh
>
> On Thu, Jan 23, 2020 at 1:28 PM Thom High via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> I've seen a few of these with engine vents on the side. Is there a
>> standard placement where these go? Or is it just chance? Any help or
>> guidance will
>> be appreciated. I purchased a set of stainless vents, for a boat, I
> plan
>> on using.
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Engine vents [message #351731 is a reply to message #351556] |
Thu, 23 January 2020 21:56 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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We know after monitoring the pressure and scanning the vent, that indeed
they do relieve pressure. Some relief is better than none in this case.
I certify safety cabinets and have instruments and can tell people that the
so called dead spot does allow air to move out more than meets the eye.
Yes it is dependent on air pressure, and more is moved when the
pressure moves up.
Our Air filter side is involved with blower units and other related design
of equipment so we have some experience in this area.
I'm not here to argue, or wrong anyone, just stating what I know.
On Thu, Jan 23, 2020 at 7:40 PM John R. Lebetski via Gmclist <
gmclist@list.gmcnet.org> wrote:
> My evaluation is they let SOME convective heat soak out at shutdown.
> However., the square inches compared to radiator area is inconsequential.
> The
> biggest problem is the step intrusion because of the about 50% of the vent
> is not functional at all. (Blocked) ,Though hot air comes out, this is
> AFTER the radiator it does not lower engine temp.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
_______________________________________________
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Engine vents [message #351739 is a reply to message #351558] |
Fri, 24 January 2020 15:32 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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Just remove your inner fender liners.
then there is no longer any venting restriction
________________________________
From: Gmclist on behalf of Carl Stouffer via Gmclist
Sent: Friday, January 24, 2020 9:33 AM
To: gmclist@list.gmcnet.org
Cc: Carl Stouffer
Subject: Re: [GMCnet] Engine vents
Effectiveness not withstanding, you asked about location. Maybe the following photo will help:
http://www.gmcmhphotos.com/photos/mechanical/p34779-dodge-front-wheels.html
The PO installed vents on my coach are as high and as far back as they can be given the location of the step, etc inside the body.
In the Summer, a LOT of heat comes out of them when I am stopped, I don't have any way to tell how much when underway.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Engine vents [message #351810 is a reply to message #351727] |
Fri, 31 January 2020 14:58 |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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I think the firebird Transam version works better visually. The lower corner cut out parallels the wheel arch, the vertical trailing edge matches the GMC panel line, and it is a GM part, sooo it could have been an option...
Jim B has a coach on his lot that had this vent installed. Don't think I took a pic.
https://www.ebay.com/itm/70-81-Trans-Am-Fender-Air-Extractor-Side-Louver-Vent-Scoop-Set-NEW-/330975978677
Dave Stragand wrote on Thu, 23 January 2020 17:12Along the same lines, I picked up a set of 1980-1981 Camaro Z28 'air
extractor' vents I was thinking of using. Has anyone used these on
their coach? They look like these:
https://www.jegs.com/i/OER/691/K8081/10002/-1. The hole is mounted
towards the front of the vehicle, so airflow works to suction out the
air.
-Dave
1978 Transmode near Pittsburgh
On Thu, Jan 23, 2020 at 1:28 PM Thom High via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I've seen a few of these with engine vents on the side. Is there a
> standard placement where these go? Or is it just chance? Any help or
> guidance will
> be appreciated. I purchased a set of stainless vents, for a boat, I
plan
> on using.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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| Re: [GMCnet] Engine vents [message #351819 is a reply to message #351810] |
Sat, 01 February 2020 10:30 |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Senior Member |
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Oh, those do look really nice. I might go that route instead.
> On Jan 31, 2020, at 3:59 PM, Joe Weir via Gmclist wrote:
>
> I think the firebird Transam version works better visually. The lower corner cut out parallels the wheel arch, the vertical trailing edge matches the
> GMC panel line, and it is a GM part, sooo it could have been an option...
>
> Jim B has a coach on his lot that had this vent installed. Don't think I took a pic.
>
>
>
> https://www.ebay.com/itm/70-81-Trans-Am-Fender-Air-Extractor-Side-Louver-Vent-Scoop-Set-NEW-/330975978677
>
> Dave Stragand wrote on Thu, 23 January 2020 17:12
>> Along the same lines, I picked up a set of 1980-1981 Camaro Z28 'air
>> extractor' vents I was thinking of using. Has anyone used these on
>> their coach? They look like these:
>> https://www.jegs.com/i/OER/691/K8081/10002/-1. The hole is mounted
>> towards the front of the vehicle, so airflow works to suction out the
>> air.
>>
>> -Dave
>>
>> 1978 Transmode near Pittsburgh
>>
>>> On Thu, Jan 23, 2020 at 1:28 PM Thom High via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>> I've seen a few of these with engine vents on the side. Is there a
>>> standard placement where these go? Or is it just chance? Any help or
>>> guidance will
>>> be appreciated. I purchased a set of stainless vents, for a boat, I
>> plan
>>> on using.
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Newark,CA
>> jimk@appliedairfilters.com
>> http://www.appliedgmcrvparts.com
>> 1-800-752-7502
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> --
> 76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen
> guys were really thinking about us second hand owners by including that beverage center...
> Columbia, SC.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
1978 Transmode (403)
Pittsburgh, PA
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| Re: Engine vents [message #351820 is a reply to message #351546] |
Sat, 01 February 2020 11:05 |
6cuda6
Messages: 975
Registered: June 2019
Karma: -6
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Senior Member |
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Someone also used a set of vents from a 2008-2010 Ford F250-450 side fender vents.....frown if you must but they actually looked really nice because they fit the GMC shape really well.
Rich Mondor,
Brockville, ON
77 Hughes 2600
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