GMC Air Cleaner/Floor Clearance

[donald w. ogden]

Fred
I had the same thing on my '77 Royale with a 403. The air cleaner was hitting
hatch cover at the 5 o'clock position. No big deal; just took a grinder to it
and gave it a little clearance.
Don

- -----Original Message-----
From: FBHUDSPETH
To: gmcmotorhome
Date: Thursday, April 13, 2000 8:16 PM
Subject: Re: GMC: GMC Air Cleaner/Floor Clearance

>Thanks, Scott.
>
>It may be that there is less clearance for the stock setup for the 403 engine
>than the stock 455. The floor cover on my '78 Royale has a 180 degree cutout
>for the front of the air cleaner. The topside has a steel plate to cover the
>hole. The void on the underside is filled with thermal and acoustical
>insulation. It was delivered this way in August 1978.
>
>The reason I became concerned about this is that the rear of the air cleaner
>was lightly rubbing the floor cover aft of the 180 degree cutout. I corrected
>that when I replaced some missing frame rail pads but I still have only a
>fraction of the clearance shown in your pictures at
>http://albums.photopoint.com/j/AlbumIndex?u=202164&a=1706042.
>
>If other owners with 403 engines have addressed this issue, I would be
>interested in what you may have done about it.
>
>'Regards,
>
>Fred Hudspeth
>'78 Royale
>Tyler, TX
>

 

[cbwood]

I think my PO must have put in a regular 455 in mine.
Have to have a rise in the hatch cover.
Also the aircleaner has two 'wings' on each side.
CBWood
77 Kingsley
MWC OK
(on 'Digest' now)

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[john massey]

on 4/13/00 10:50 PM, GMC Motorhome Digest at

> From: FBHUDSPETH
> Subject: Re: GMC: GMC Air Cleaner/Floor Clearance
>
> Thanks, Scott.
>
> It may be that there is less clearance for the stock setup for the 403 engine
> than the stock 455. The floor cover on my '78 Royale has a 180 degree cutout
> for the front of the air cleaner. The topside has a steel plate to cover the
> hole. The void on the underside is filled with thermal and acoustical
> insulation. It was delivered this way in August 1978.
>

> If other owners with 403 engines have addressed this issue, I would be
> interested in what you may have done about it.

And here I thought some PO had put that metal plate on the floor cover. When
we first got the 77 Royale 3 years ago, I'd assumed a change had been made
to the Carb/aircleaner requiring a cutout to the floor cover. It looks like
it was shoddy work by a handyman.

John Massey
1977 Royale