| 1977 Birchaven -Engine Smell in Cab [message #312379] |
Sun, 22 January 2017 21:56  |
Matthew
Messages: 1
Registered: January 2017
Karma: 0
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Junior Member |
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Hey all,
I was looking at purchasing a 1977 Birchaven, but when I was driving it on a test drive the motorhome smelled a bit like engine fumes. It wasn't overwhelming, but noticeable. Is this type of experience typical in GMC Motorhomes because of the technology and engine location directly in the cab? Is there any chance to make the home smell free or will there always be a slight odor when the engine is running?
Thanks!
Matthew
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| Re: 1977 Birchaven -Engine Smell in Cab [message #312395 is a reply to message #312379] |
Mon, 23 January 2017 09:23  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Senior Member |
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If you buy it, always run a carbon monoxide detector, as it does not smell and can be deadly (from main engine and generator).
The fuel system and it's hoses run the full length of the coach. Leaks and malfunctions along the filler, emissions and venting routes can often push smells into the cab area.
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: 1977 Birchaven -Engine Smell in Cab [message #312396 is a reply to message #312379] |
Mon, 23 January 2017 09:42 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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A single drop of fuel or oil on a hot engine produces a lot of vapor odor. So all that needs to be good. You should also maintain positive air pressure in the MH. Opening the toll window produces negative pressure inside sucking make up air from any voids and drawing in fumes. There was a well written article on this in the now defunct Cinnabar news letter. Running the dash fan on fresh and mid to high settings will keep positive pressure inside and also minimize holding tank odors. You should not smell fuel or oil. The good thing is once all sorted, you will be able to recognize fuel or oil odors if they do happen and take action.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] 1977 Birchaven -Engine Smell in Cab [message #312399 is a reply to message #312397] |
Mon, 23 January 2017 10:00 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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On the later coaches with the "improved" ?? Constant run heating/cooling
fan motor, it is possible to intake odors from traffic ahead of you. Verify
that this is not the case before you spend any time trying to fix a problem
that is not yours.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jan 23, 2017 7:43 AM, "Matt Colie" wrote:
> Matthew wrote on Sun, 22 January 2017 22:56
>> Hey all,
>>
>> I was looking at purchasing a 1977 Birchaven, but when I was driving it
> on a test drive the motorhome smelled a bit like engine fumes. It wasn't
>> overwhelming, but noticeable. Is this type of experience typical in GMC
> Motorhomes because of the technology and engine location directly in the
>> cab? Is there any chance to make the home smell free or will there
> always be a slight odor when the engine is running?
>>
>> Thanks!
>>
>> Matthew
>
> Matthew (I like the name),
>
> Our 73-23 has no such issue. In actual fact, I will more likely pick up
> that someone in front of us has a lube or fuel leak. Our engine hatch has
> no
> rubber seal.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Still Loving OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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