Home » Public Forums » GMCnet » Fresh air vent for dash air?
| Fresh air vent for dash air? [message #130678] |
Fri, 17 June 2011 22:36  |
Don Walton
Messages: 50
Registered: September 2007
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I have been off of the forum for a while and am now trying to get my coach on the road. One problem I have is that the dash air box draws air from inside the engine bay instead of drawing from outside air. I am wondering if anyone has made an add on vent which would attach to the air box and go to a fresh air vent? My wife says she will not go anywhere in it if I can't get rid of "that smell". I have searched the pictures and found air box mods but nothing like I am talking about. Any help out there?? Thanks!
Don Walton in NC,
75 Glenbrook,
too many MGs
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| Re: Fresh air vent for dash air? [message #130699 is a reply to message #130678] |
Sat, 18 June 2011 06:07  |
Don Walton
Messages: 50
Registered: September 2007
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Thanks for the replies. I had not seen the page on hot and cold. This explains why there is a hole in the dash. I think a PO started the recirculation mod and never finished it. Now maybe I can get rid of the engine bay smell coming through the vents.
Don Walton in NC,
75 Glenbrook,
too many MGs
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| Re: Fresh air vent for dash air? [message #130716 is a reply to message #130678] |
Sat, 18 June 2011 09:57 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Since we don't have true cowl vents like a car, the intake is up sort of under the hoods, more actually on centre. I guess the theory was to grab outside air from behind the grill. This works well while moving but if you have fuel, oil or fume leaks you will get some smells standing still. I would as Jim K suggests find the cause of the problem leak causing the smell. For me I like the 'as designed' fresh air coming in as it creates positve pressure in the coach and stops drafts and leaks (or turns them into outflow leaks) and as it brings in fresh air the windows don't steam up. You also change out the air in the coach and eliminate negative pressure and bathroom smells, monoxide etc. I only use recirc when it's extremely hot and then for a short time. Most owners manuals state not to leave the controls in recic as a continous practice. I know on newer Mercedes it times out after a while and reverts to fresh.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Fresh air vent for dash air? [message #130768 is a reply to message #130678] |
Sat, 18 June 2011 16:45 |
Don Walton
Messages: 50
Registered: September 2007
Karma: 0
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As far as I can tell this is not a fuel leak/exhaust leak thing. It is just the smell of a hot engine. Not hot as in overheated just one that has been running. It does not seem to be a problem until you stop the coach and there is no more fresh air being driven through the grille. Just smells like a good old carb using internal combustion engine. My British cars have sort of the same smell.
Don Walton in NC,
75 Glenbrook,
too many MGs
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| Re: [GMCnet] Fresh air vent for dash air? [message #130773 is a reply to message #130768] |
Sat, 18 June 2011 17:34 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Don,
If your engine hatch seal isn't in good shape, that's a much more
likely source of the engine smell. Then there's the vertical gap at
each end of the firewall (under the hoods) which is unsealed in a lot
of coaches. Add in the "chipmunk cheeks" at the sides, over the front
wheels, where the coach sides are separated from the cockpit floor,
and you've got LOTS more air leakage than the little fresh air vent
could take in. And any air coming in the fresh air vent without the
fan operating is not likely to make it through the labyrinthine
ductwork very quickly -- it's hard pressed to get through with high
blower.
Make sure the hatch seal is good.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Sat, Jun 18, 2011 at 5:45 PM, Don Walton wrote:
>
>
> As far as I can tell this is not a fuel leak/exhaust leak thing. It is just the smell of a hot engine. Not hot as in overheated just one that has been running. It does not seem to be a problem until you stop the coach and there is no more fresh air being driven through the grille. Just smells like a good old carb using internal combustion engine. My British cars have sort of the same smell.
> _______________________________________________
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Fresh air vent for dash air? [message #130777 is a reply to message #130773] |
Sat, 18 June 2011 19:05 |
Don Walton
Messages: 50
Registered: September 2007
Karma: 0
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I replaced the hatch seal when I got the coach as I figured it was the cause. The only place I can detect any o'de engine is through the dash vents and that is wen sitting still. I am going to go over as much as I can on the seams to see if anything is coming in that way. Thanks for all suggestions, keep 'em coming!
Don Walton in NC,
75 Glenbrook,
too many MGs
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| Re: [GMCnet] Fresh air vent for dash air? [message #130849 is a reply to message #130844] |
Sun, 19 June 2011 09:12 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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After I wrote that post, it occurred to me that I no longer have anyone
riding in the co-pilots seat except Mary's dog, and she never complains if
it is too hot or too cold. She is just a happy camper to be going down the
road. Damn those memories, anyhow.
Jim Hupy
Salem, OR
78 GMc Royale 403
On Sun, Jun 19, 2011 at 7:00 AM, Don Walton <dhw@rtmc.net> wrote:
>
>
> I always say that women are always too cold unless they are too hot. No
> disrespect intended either.
> --
> Don Walton in NC,
>
> 75 Glenbrook,
>
> too many MGs
>
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| Re: [GMCnet] Fresh air vent for dash air? [message #130858 is a reply to message #130851] |
Sun, 19 June 2011 10:55 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Rob, believe me, I do cherish them. I just can't control them, and they
flood over my awake thoughts and take precedence. Then I am emotionally
impacted (crying) when I have no control or strength to deal with them. That
is the "damn" part. The wounds are fresh and unhealed, all the busy activity
helps a great deal as do all my family, friends, and the GMC Community for
sure. I have two tasks remaining to be done one is to deal with her ashes, a
burial at sea, and to hold those accountable for her botched surgery that
untimately resulted in her death. I am really pissed about that and it won't
rest until it is resolved. Thanks for being there and listening and for the
kind words of encouragement.
A grateful for 50 years Jim Hupy
Salem, OR
78 GMc Royale 403
On Sun, Jun 19, 2011 at 7:36 AM, Rob Mueller <robmueller@iinet.net.au>wrote:
> Jim,
>
> I disagree, CHERISH those memories! :)
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: James Hupy
>
> Damn those memories, anyhow.
>
> Jim Hupy
>
>
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| Re: [GMCnet] Fresh air vent for dash air? [message #130891 is a reply to message #130858] |
Sun, 19 June 2011 14:22 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Tincture of time is the only medicine which helps. Eventually the good memoies begin to outweigh the bad ones.
--johnny
--- On Sun, 6/19/11, James Hupy <jamesh1296@gmail.com> wrote:
From: James Hupy <jamesh1296@gmail.com>
Subject: Re: [GMCnet] Fresh air vent for dash air?
To: gmclist@temp.gmcnet.org
Date: Sunday, June 19, 2011, 3:55 PM
Rob, believe me, I do cherish them. I just can't control them, and they
flood over my awake thoughts and take precedence. Then I am emotionally
impacted (crying) when I have no control or strength to deal with them. That
is the "damn" part. The wounds are fresh and unhealed, all the busy activity
helps a great deal as do all my family, friends, and the GMC Community for
sure. I have two tasks remaining to be done one is to deal with her ashes, a
burial at sea, and to hold those accountable for her botched surgery that
untimately resulted in her death. I am really pissed about that and it won't
rest until it is resolved. Thanks for being there and listening and for the
kind words of encouragement.
A grateful for 50 years Jim Hupy
Salem, OR
78 GMc Royale 403
On Sun, Jun 19, 2011 at 7:36 AM, Rob Mueller <robmueller@iinet.net.au>wrote:
> Jim,
>
> I disagree, CHERISH those memories! :)
>
> Regards,
> Rob M.
> USAussie - Downunder
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: James Hupy
>
> Damn those memories, anyhow.
>
> Jim Hupy
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Fresh air vent for dash air? [message #133652 is a reply to message #133647] |
Thu, 07 July 2011 12:28 |
Don Walton
Messages: 50
Registered: September 2007
Karma: 0
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Member |
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When we were in Florida a couple of weeks ago I picked up some new wheels and tires at Jim Bounds and asked him about my problem with dash air venting. He knew exactly what I was talking about with residual hot engine smells coming through the dash vents. It just comes down to the fact that the ac air is pulled through the engine bay instead of from outside air via a cowl vent or something like it. He suggested tying the ac box to the plastic air box on the passenger side and letting it recirculate the air in the coach. I will figure something out, just have to keep digging. I was wondering if anyone had ever moved the blower to another location for fresh air and piped the fresh air into the air box? Probably more trouble than it is worth but I am just wondering.
Don Walton in NC,
75 Glenbrook,
too many MGs
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was purchase and I arrived home I started looking things over really good.