| Re: [GMCnet] So, about removing the Onan heads and looking for carbon... [message #192719] |
Mon, 10 December 2012 10:16  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma:
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Senior Member |
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Clean the carbon with a wire brush, or a scraper. Alls you need to do is look out for the sealing surface where the head gasket goes and don't dig into the metal there. If there's carbon on the heads and piston tops it will be obvious. wire brush it off. If you have a steady hand, use a wire brush in a drill, it's easier. Use a hand brush to clear the crud outa the fins. There are solvents, but they're nasty stuff to mess with and the brush works well. A carb rebuild kit is a Good Idea after all these years, it will have gaskets and seals which haven't hardened and thus still seal.
--johnny
'76 23' transmode norris
'76 palm beach
From: Robin Hood <loxley@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, December 10, 2012 8:11 AM
Subject: [GMCnet] So, about removing the Onan heads and looking for carbon...
What am I looking for, exactly, and what do I do with it when I find it?
I need to remove the Onan cover from over the heads and clean the cooling fins.
I need to take off the cylinder heads and "look for carbon" but I've
never done this before so I don't really know what I'm looking for.
Surely somebody has documented the process on the GMC photo site?
If there's any carbon, I have to clean it away. Whether this requires
chemicals or just a damp rag I don't know. Neither do i know what it's
even necessary in the first place... but I do know I don't want to get
back into my Onan once I've got it in the coach.
Need a carb kit from JimK just to be on the safe side. My chemdip
prolly ate the gaskets in the needle/seat (I didn't know that stuff
was removable),
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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