Anyone assist with this one?


Information and questions on GL1000 Goldwings (1975-1979)
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Aussie81Interstate
Posts: 1178
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Anyone assist with this one?

Post by Aussie81Interstate »



Hi guys,

Picking up my carbs tomorrow morning, and I was looking at the intake O rings I removed when I took the carbs off.

The parts manual says they are 40 x 2.6 - which I have 4 of from a gasket set purchased a short time ago.

Comparing these NEW O rings with the ones I removed they are quite different.

The comparison seems to be:
The new O rings are round profile, the old O rings are flattened on one side and half round on the other side of the profile - I presume these might be the original Honda ones, so I am inclined to re-use them as they would seem to cover a larger area with the flattened surface sitting on the side of the head - instead of the smaller squashed O ring profile of the new O ring. I will be using a very small smear of RTV which will seal them anyway..

Any thoughts on this - or has someone seen these differences before.

Bike is a 1981 GL1100 interstate...


Note: the old ones on top of the picture


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dingdong
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Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Anyone assist with this one?

Post by dingdong »

The original o-rings were round. They become flattened from being compressed. The new o-rings look to be way to thin which is typical of after market gasket sets. You might want to put a gauge on one of them. I don't think they are going to work. Just me but I would stay away from any kind of sealant. If the o-rings are sized correctly none is needed. Good luck.

Tom.
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Aussie81Interstate
Posts: 1178
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: Anyone assist with this one?

Post by Aussie81Interstate »

I actually opted to re-use the old ones - as they seemed to at least be raised above the inlet runner profile. The newer O rings didn't appear to be thick enough - although they measured at 2.6mm profile or depth.

I used some aviation gasket maker/sealer under the O ring and on top of it where they mount to the heads, so I know it won't leak anyway.

Started the bike up after installing the refreshed carbs, and all seems good.

Will be giving them another sync in a week or so.
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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Anyone assist with this one?

Post by dingdong »

Ya gotta do what ya gotta do! Should work. Good luck!

Tom
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HawkeyeGL1200
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Location: Courtland, Va.
Motorcycle: 1984 GL1200 Interstate
1981 GL1100 Interstate

Re: Anyone assist with this one?

Post by HawkeyeGL1200 »

I'm not a fan of using a "hardening" sealant on an oring. I've done it when I had to do it, but I can still remember every single place I've ever done it and every single time I did it, it bothered me.

The o'ring is a "live" joint, that is meant to be more fluid than static... anyway.

I agree that the "new" ones weren't going to work. If I had to re-use the old, I'd have cleaned them best I could and put a little petroleum jelly on them or some o'ring grease.

I doubt they're going to leak, and I recon that most important.
I am wrong as often as I am right concerning what is wrong with someone else' motorcycle without having seen the machine in person. Guessing with limited information, as to the source of the trouble, is sketchy at best.
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Aussie81Interstate
Posts: 1178
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (Historic registration - finally)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: Anyone assist with this one?

Post by Aussie81Interstate »

Hawkeye,

I used non hardening aviation sealant. It is a sticky liquid and holds the seal in place in the groove of the intake runner, plus a smear on the outside that contacts the head. The whole purpose of using this as against RTV is this sealant is impervious to petrol and oil contamination. I'm 100% positive it won't leak and will seal correctly.

thanks

Charlie

http://www.ebay.com.au/itm/Permatex-3J- ... 4897.l4275

this is the stuff I used, it comes in handy


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