| Re: [GMCnet] So, about removing the Onan heads and looking for carbon... [message #192710] |
Mon, 10 December 2012 07:52  |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
|
Senior Member |
|
|
Just pull them, glass bead blast them, or have it done. It should be
relatively inexpensive as it takes less than 15 minutes. You can reuse the
old head gaskets if you haven't torn them during removal. Just spray about
5 coats of silver paint on both sides of them and they'll seal just fine.
Clean the head bolts and reassemble. I can't remember the torque specs but
I'm sure someone here will chime in.
On Mon, Dec 10, 2012 at 6:11 AM, Robin Hood <loxley@gmail.com> wrote:
> 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
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] So, about removing the Onan heads and looking for carbon... [message #192713 is a reply to message #192710] |
Mon, 10 December 2012 08:07  |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
It's around 19 ft-lbs, MUST use a torque wrench. I've got the manuals
and specs and all, as well as off-list advice on the importance of
proper torquing. :)
On Mon, Dec 10, 2012 at 7:52 AM, Steven Ferguson <botiemad11@gmail.com> wrote:
> Just pull them, glass bead blast them, or have it done. It should be
> relatively inexpensive as it takes less than 15 minutes. You can reuse the
> old head gaskets if you haven't torn them during removal. Just spray about
> 5 coats of silver paint on both sides of them and they'll seal just fine.
> Clean the head bolts and reassemble. I can't remember the torque specs but
> I'm sure someone here will chime in.
>
> On Mon, Dec 10, 2012 at 6:11 AM, Robin Hood <loxley@gmail.com> wrote:
>
>> 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
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Fathom the hypocrisy of a nation where every citizen must prove they have
> health insurance......but not everyone has to prove they're a citizen.
> Steve Ferguson
> Sierra Vista, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
