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Seal Ring: Heat Exchanger to Muffler
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ia02
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PostPosted: Tue Jul 02, 2013 6:44 pm    Post subject: Seal Ring: Heat Exchanger to Muffler Reply with quote

Does anyone know where I can get the seal ring that seals the threaded connection between the stock heat exchangers and muffler? The seal sits inside the female threads of the heat exchanger and the muffler flange buts up against the seal.

Thanks in advance...
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MOCHABILL
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PostPosted: Tue Jul 02, 2013 8:11 pm    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

ia02 wrote:
Does anyone know where I can get the seal ring that seals the threaded connection between the stock heat exchangers and muffler? The seal sits inside the female threads of the heat exchanger and the muffler flange buts up against the seal.

Thanks in advance...


Russ Wolfe[RIP] recommended using the copper thermalcouple tubing,used in hot water heaters.

Regards.
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ia02
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PostPosted: Tue Jul 02, 2013 8:21 pm    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

[quote="MOCHABILL"]
ia02 wrote:
Russ Wolfe[RIP] recommended using the copper thermalcouple tubing,used in hot water heaters.


Did he prescribe cutting a length forming into a ring and just laying it inside the opening? Or should the ends be joined in some way? Any info is greatly appreciated
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Bobnotch
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PostPosted: Tue Jul 02, 2013 8:43 pm    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

[quote="ia02"]
MOCHABILL wrote:
ia02 wrote:
Russ Wolfe[RIP] recommended using the copper thermalcouple tubing,used in hot water heaters.


Did he prescribe cutting a length forming into a ring and just laying it inside the opening? Or should the ends be joined in some way? Any info is greatly appreciated


If I remember right, he suggested angle cutting the ends, so that they overlapped in a smooth fashion (formed a complete circle).
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ia02
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PostPosted: Tue Jul 02, 2013 8:54 pm    Post subject: Reply with quote

does it like the seals are included in this kit?

http://www.vwispwest.com/341298003.html?page=1
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Bobnotch
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PostPosted: Wed Jul 03, 2013 6:01 am    Post subject: Reply with quote

ia02 wrote:
does it like the seals are included in this kit?

http://www.vwispwest.com/341298003.html?page=1


It certainly looks like it. I'd give them a call to find out before ordering though.
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volksaddict
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PostPosted: Sat Feb 06, 2021 6:30 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

I'm looking for these now too. Wish I'd saved that bad thermocouple I changed out last fall. I tried some single port intake copper rings but they didn't seem to take up enough space and I'm thinking the thermocouple tubing isn't much bigger. I remember an aluminum ring falling out of one of these years ago, way bigger than the rings mentioned above.
Anyone have a pic or description of the original sealing ring?
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ataraxia
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PostPosted: Sat Feb 06, 2021 8:42 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

volksaddict wrote:
I'm looking for these now too. Wish I'd saved that bad thermocouple I changed out last fall. I tried some single port intake copper rings but they didn't seem to take up enough space and I'm thinking the thermocouple tubing isn't much bigger. I remember an aluminum ring falling out of one of these years ago, way bigger than the rings mentioned above.
Anyone have a pic or description of the original sealing ring?


https://vwispwest.com/gasket-exhaust-to-exchanger-n138361/?p=YzE9MTMx
https://www.mcmaster.com/97725A590/
https://www.belmetric.com/hollow-crush-gaskets-c-1...-9208.html


Last edited by ataraxia on Sun Feb 07, 2021 7:24 am; edited 1 time in total
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EasternNotch
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PostPosted: Sat Feb 06, 2021 4:24 pm    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

I took some measurements of some I have

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gt1953
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PostPosted: Sun Feb 07, 2021 7:05 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

You do need that ring installed, when mine went back together I also used some exhaust liquid sealant to make certain it sealed.
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volksaddict
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PostPosted: Sun Feb 07, 2021 8:52 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

Thank you Eastern Notch for the best reply to a technical question I have ever received!!
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KTPhil Premium Member
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PostPosted: Sun Feb 07, 2021 1:07 pm    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

I always clean those super-fine threads and use anti-seize on them, to make it more likely (though not certain) they will come part later if needed.
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volksaddict
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PostPosted: Wed Feb 17, 2021 5:57 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

So I ended up using a 40hp cylinder sealing ring from the pile of leftover gasgets, cut at a 45 and fit to the heat riser. The ring is a good beefy size, bigger than the intake sealing rings I tried and the soft copper fits together nicely when cut with wire cutters. Threads clean and wiped with antisieze, big nuts tightened with channellock pliers, nos mufler. Good to go Very Happy
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KTPhil Premium Member
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PostPosted: Wed Feb 17, 2021 9:54 am    Post subject: Re: Seal Ring: Heat Exchanger to Muffler Reply with quote

Retighten those big nuts after about 500 miles or so. They can loosen with heat/cool cycles, and the escaping gasses corrode those fine threads. No need to put a death grip on it, just snug it well after it sets in over those miles. Check it again at the next valve adjustment.
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