| Gas smell in coach [message #197618] |
Wed, 06 February 2013 20:30  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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Senior Member |
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On the hunt to track down oil leaks and the gas smell, I ordered the correct carb kit (Advance) and the phenolic gasket (JimK). I have a neighbor who is a better mechanic than I and he agreed to go through the carb. Today he was over because I was making him some patch panels on a car he's restoring. While waiting for some welds to cool we were looking at the coach and he was looking at the carb and where I saw the damp gasket. He reached down and turned one of the mounting bolts with his fingers.
"Have you loosened these?"
"No."
"Well, they're loose".
And all four were loose. The air horn screws were not 'tight' either so I snugged them up too, started the engine, and didn't immediately notice any smell. Could have been just PO incompetence. Since I've got to pull the intake to plug the crossover, we're going to go through the carb anyway but I'm hopeful.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
[Updated on: Wed, 06 February 2013 20:31] Report message to a moderator |
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| Re: Gas smell in coach [message #197649 is a reply to message #197618] |
Thu, 07 February 2013 00:47  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| Kerry Pinkerton wrote on Wed, 06 February 2013 18:30 |
On the hunt to track down oil leaks and the gas smell, .
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Kerry,
Also open your gas fill door and take a sniff. You will probably smell a bit of residue gas. Then look at the gasket abound the filler neck. Some are so rotten that you can see the separation. That leads to the chamber by the driver's left arm. It is not a particularly well sealed chamber.
If you smell it in the back, check the lines on the Onan. It is a long convoluted thing so it can slide out.
Then of course, the tanks and all those lines. (I haven't had mine down for a full week, now. *smile* Ruth hates the smell of has. )
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: Gas smell in coach [message #197669 is a reply to message #197618] |
Thu, 07 February 2013 08:55 |
habbyguy
Messages: 896
Registered: May 2012
Location: Mesa, AZ
Karma: 3
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I had some gas smell in mine, too - particularly when I'd stop for gas (but not necessarily before I started pumping). I noticed my carb had signs of weeping gas around the gasket for the top plate, toward the front of the engine. The screws that hold the top plate on seemed to be pretty loose - I snugged 'em down a half turn and the smell seems to have vanished.
It sounds like the thermal cycling our motors go through might tend to loosen up hardware (and/or the hardware was never tightened to spec).
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
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| Re: [GMCnet] Gas smell in coach [message #197675 is a reply to message #197618] |
Thu, 07 February 2013 10:18 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Kerry, a few words of caution about overtightening the hold down bolts on
the quadrajet carb. The two towards the front of the coach will distort
the carb into an unusable piece of pot metal if they are overtightened. I
run them down to contact, and pull one finger tight with an offset box
wrench. Same for the rear two, although they are not as critical. The air
cleaner stud can also distort the heck out of the float bowl if
overtightened. That is why GM put a wing nut on it. Just snug enough to
prevent the air cleaner from moving is plenty tight.
Jim Hupy
Salem, Or
78 Gmc Royale 403
On Feb 6, 2013 6:30 PM, "Kerry Pinkerton" <Pinkertonk@mchsi.com> wrote:
>
>
> On the hunt to track down oil leaks and the gas smell, I ordered the
> correct carb kit and the phenolic gasket (JimK). I have a neighbor who is
> a better mechanic than I and he agreed to go through the carb. Today he
> was over because I was making some patch panels on a car he's restoring.
> While waiting for something we were looking at the coach and he was
> looking at the carb and where I saw the damp gasket. He reached down and
> turned one of the mounting bolts with his fingers.
>
> "Have you loosened these?"
>
> "No."
>
> "Well, they're loose".
>
> And all four were loose. The air horn screws were not 'tight' either so I
> snugged them up too, started the engine, and didn't immediately notice any
> smell. Could have been just PO incompetence. Since I've got to pull the
> intake to plug the crossover, we're going to go through the carb anyway but
> I'm hopeful.
> --
> Kerry Pinkerton
>
> North Alabama, near Huntsville,
>
> 77 Eleganza II, "The Lady", 403CI, also a 76 Eleganza being re-bodied as
> an Art Deco car hauler
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: Gas smell in coach [message #197687 is a reply to message #197618] |
Thu, 07 February 2013 11:45 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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James you beat me to it. They improved the casting on front on later models but it can still be buggered with an agressive hand. Spec is in inch pounds.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Gas smell in coach [message #197717 is a reply to message #197687] |
Thu, 07 February 2013 16:03 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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G'day,
Reference Maintenance Manual X-7525 Page 6A-66 Torque Specifications
Carburetor to Intake Manifold Bolts 15 ft. lb.
John is correct also it's 180 in. lb. ;-)
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: John R. Lebetski
James you beat me to it. They improved the casting on front on later models but it can still be buggered with an agressive hand.
Spec is in inch pounds.
--
John
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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