| Lh donut pn [message #308684] |
Thu, 13 October 2016 13:07  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Is 60241 Felpro correct manufold to pipe LH 455 ? Can't find in interchange thx
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Lh donut pn [message #308686 is a reply to message #308684] |
Thu, 13 October 2016 13:28  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Yes Sir..
JohnL455 wrote on Thu, 13 October 2016 14:07Is 60241 Felpro correct manufold to pipe LH 455 ? Can't find in interchange thx
C. Boyd
76 Crestmont
East Tennessee
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| Re: Lh donut pn [message #308691 is a reply to message #308684] |
Thu, 13 October 2016 15:45 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Ok thanks... With stock exhaust is there enough flex to just undo the 2 spring bolts and slip in a new one?
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Lh donut pn [message #308693 is a reply to message #308684] |
Thu, 13 October 2016 15:57 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Yes. Plenty of flex to change it.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Lh donut pn [message #308695 is a reply to message #308684] |
Thu, 13 October 2016 16:30 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Ok may repair on the road if the bolts cooperate. .
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Lh donut pn [message #308739 is a reply to message #308684] |
Fri, 14 October 2016 16:55 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Got the bolts out and donut was in pretty good shape --not perfect but not shot. But found the pipe in my hand! Not clamped well or at all to muffler. I have donut coming to NAPA and will pick up some clamps. 2 1/4 and a 2.5 in case pipe is distorted and small clamp won't fit. But pouring rain now so can only do donut work from the hatch for now.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Lh donut pn [message #308847 is a reply to message #308684] |
Sun, 16 October 2016 21:51 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Put in new donut but still leaked, so as a last resort coated the gasket with exh sealant and assembled. This was Cadillac quite for 1 hour drive time and now noisy. You would think those spring bolts would put plenty of pressure on rhe flange. Any other tricks I am missing to fix this while on the road?
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Lh donut pn [message #308849 is a reply to message #308848] |
Sun, 16 October 2016 22:28 |
Bullitthead
Messages: 1411
Registered: November 2013
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Springs weaken with heat. Maybe some new springs would help. I always bang the pipe a few times after getting the new donuts up to operating temperature WHILE THE ENGINE IS RUNNING to settle things into place on those spring-loaded setups.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: [GMCnet] Lh donut pn [message #308864 is a reply to message #308849] |
Mon, 17 October 2016 08:06 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Could also be a chunk of the old donut or clump of rust remaining on one of
the two exhaust parts.
Sully
77 eleganza 2
Seattle
On Sunday, October 16, 2016, Terry wrote:
> Springs weaken with heat. Maybe some new springs would help. I always bang
> the pipe a few times after getting the new donuts up to operating
> temperature WHILE THE ENGINE IS RUNNING to settle things into place on
> those spring-loaded setups.
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
>
>
> _______________________________________________
> GMCnet mailing list
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Lh donut pn [message #308874 is a reply to message #308847] |
Mon, 17 October 2016 10:29 |
Dennis S
Messages: 3046
Registered: November 2005
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I've had to rotate the donut searching for the right "fit" to effect a seal.
Dennis
JohnL455 wrote on Sun, 16 October 2016 21:51Put in new donut but still leaked, so as a last resort coated the gasket with exh sealant and
assembled. This was Cadillac quite for 1 hour drive time and now noisy. You would think those spring bolts would put plenty of pressure on rhe flange. Any other tricks I am missing to fix this while on the road?
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Lh donut pn [message #308903 is a reply to message #308684] |
Mon, 17 October 2016 15:18 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I loosened the clamp at muff inlet and wrasssseled the pipe to try to get some rotation. The parallelism was poor manifold to pipe. I also wiggled the pipe as the spring bolts tightened to try to home it. Four hours highways and stilll quiet. Knock on formica covered wood. Is anyone doing the head pipes now ? Also curious on the original exact form factor of the mufflers as mine appear shorter cheaper replacements with an extra pipe to make up shortfall. I can source them off an original.
John Lebetski
Woodstock, IL
77 Eleganza II
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