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size or part # for exhaust donut on a 403 [message #363306]

Wed, 07 April 2021 11:09

boybach

Messages: 566
Registered: December 2020
Location: Vancouver Island

Karma: 4

Senior Member

Most of the parts places around here are very familiar with the 455 but when you ask about the 403 they get all puzzled looking and ask "what's that?" and "are you sure it ain't a 455? etc?" so to save those poor parts persons delving through reams of catalogs, anyone know the size or # offhand?

Larry

Larry - Victoria BC - 1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses

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Re: size or part # for exhaust donut on a 403 [message #363308 is a reply to message #363306]

Wed, 07 April 2021 12:32

JohnL455

Messages: 4447
Registered: October 2006
Location: Woodstock, IL

Karma: 12

Senior Member

I will look in interchange, but I suspect they are the same 2.25” part as 455. Interchange makes no distinction for 403 or 455 so should be same part.

John Lebetski
Woodstock, IL
77 Eleganza II

[Updated on: Wed, 07 April 2021 17:47]

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[GMCnet] Re: size or part # for exhaust donut on a 403 [message #363312 is a reply to message #363306]

Wed, 07 April 2021 14:41

toronto675

Messages: 4
Registered: September 2016
Location: Squamish BC

Karma: 0

Junior Member

Larry I bought the Fel Pro 60142 at Lordco the engines listed on the package includes the 403. I have a 455 though .
Bert
On Wednesday, April 7, 2021, 09:09:54 AM PDT, twlldeen@gmail.com wrote:

Most of the parts places around here are very familiar with the 455 but when you ask about the 403 they get all puzzled looking and ask "what's that?"
and "are you sure it ain't a 455? etc?" so to save those poor parts persons delving through reams of catalogs, anyone know the size or # offhand?

Larry
--
Larry - Victoria BC -

1977 Palm Beach VIN TZE167V101295 - 39,000 miles, PO said everything working but forgot the word NOT. New wiper blades!
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Re: size or part # for exhaust donut on a 403 [message #363318 is a reply to message #363306]

Wed, 07 April 2021 18:41

boybach

Messages: 566
Registered: December 2020
Location: Vancouver Island

Karma: 4

Senior Member

Thanks for the help guys, I met an actual parts person today and we compared the leaky one after I took it out and matched it up to a WALKER 31398. Maybe of some help to the next guy, this is what you need.

Perfect fit, and the motor is purring like a sleeping lion. Bonus was when we looked underneath the coach we saw the brand new custom stainless muffler and pipes. So pretty and not even blued up to much yet. Beautiful!

Larry

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