| Re: [GMCnet] spark aresters [message #327452] |
Sun, 24 December 2017 11:37  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
|
Senior Member |
|
|
Engines that run at a very constant rpms have carbon build up issues. This is due to their never changing combustion chamber turbulence patterns. Engines that have ever changing rpm ranges don't develop these issues. This is the reason that our Onans require having the heads pulled off for carbon deposit removal. It's required after so many hours of operation. I don't remember that number of hours right now. So to keep your Onan operating properly. It's a very simple task to do. Anyone can do it. And I mean anyone. Bob Dunahugh Member GMCMI
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] spark aresters [message #327456 is a reply to message #327452] |
Sun, 24 December 2017 13:49  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
We now have a Catalitic converter with muffler.
Our original Onan emits smell from hydrocarbon that you can notice, this
CAT cuts it down 98%
On Sun, Dec 24, 2017 at 9:38 AM Bob Dunahugh wrote:
> Engines that run at a very constant rpms have carbon build up issues. This
> is due to their never changing combustion chamber turbulence patterns.
> Engines that have ever changing rpm ranges don't develop these issues.
> This is the reason that our Onans require having the heads pulled off for
> carbon deposit removal. It's required after so many hours of operation. I
> don't remember that number of hours right now. So to keep your Onan
> operating properly. It's a very simple task to do. Anyone can do it. And
> I mean anyone. Bob Dunahugh Member GMCMI
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] spark aresters [message #327457 is a reply to message #327452] |
Sun, 24 December 2017 14:17 |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
|
Senior Member |
|
|
Has anyone ever looked into SeaFoam spray for the Onan for carbon removal? I have personally seen it work wonders in a variety of engines large and small.
> On Dec 24, 2017, at 12:38 PM, Bob Dunahugh wrote:
>
> Engines that run at a very constant rpms have carbon build up issues. This is due to their never changing combustion chamber turbulence patterns. Engines that have ever changing rpm ranges don't develop these issues. This is the reason that our Onans require having the heads pulled off for carbon deposit removal. It's required after so many hours of operation. I don't remember that number of hours right now. So to keep your Onan operating properly. It's a very simple task to do. Anyone can do it. And I mean anyone. Bob Dunahugh Member GMCMI
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
1978 Transmode (403)
Pittsburgh, PA
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] spark aresters [message #327462 is a reply to message #327452] |
Sun, 24 December 2017 17:00 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Haven't you guys heard of the "Second gear tune-up" Onto the nearest
freeway on ramp, stuff it into second, stand on it, get off the freeway at
the next exit, over the overpass and back onto the freeway, head back to
the shop, shift into top and loaf it back to the shop. Kill it or cure it,
I am told.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Dec 24, 2017 2:30 PM, "Jim Kanomata" wrote:
Back in the 60's when we had a piston knock so we would carefully sprinkle
water at mild rpm and it would clear it up.
On Sun, Dec 24, 2017 at 2:12 PM David H. Jarvis wrote:
> Years ago, didn't they spray water down the carb to rid of carbon buildup?
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] spark aresters [message #327466 is a reply to message #327452] |
Sun, 24 December 2017 20:02 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
|
Senior Member |
|
|
I don't disagree that water, or other liquids could clean some carbon off pistons in a car, or truck engine. Personally before I did anything by pouring liquids in. I'd first put an inspection camera in the spark plug hole to assess the situation. If so inclined. Do the dump of whatever. Then pull a few plugs to evaluate what happened. With generators. I've seen carbon build up that you could measure with a ruler. Many times it's in piles between the valves. I wouldn't like to think were those could end up. My inspection camera is a very important tool in my tool box. Bob Dunahugh 78 Royale Iowa
________________________________
From: Bob Dunahugh
Sent: Sunday, December 24, 2017 11:37 AM
To: gmclist@list.gmcnet.org
Subject: RE: spark aresters
Engines that run at a very constant rpms have carbon build up issues. This is due to their never changing combustion chamber turbulence patterns. Engines that have ever changing rpm ranges don't develop these issues. This is the reason that our Onans require having the heads pulled off for carbon deposit removal. It's required after so many hours of operation. I don't remember that number of hours right now. So to keep your Onan operating properly. It's a very simple task to do. Anyone can do it. And I mean anyone. Bob Dunahugh Member GMCMI
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
