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Onan Oil Leak [message #97151] Wed, 25 August 2010 10:31 Go to next message
Neil is currently offline  Neil   United States
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My trusty Onan has a very slow leak straight down on the muffler. Its not coming from the oil filter. Before I tear into it further - any ideas?

Thanks

Neil
76 Eleganza now sold
Los Angeles

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Re: Onan Oil Leak [message #97155 is a reply to message #97151] Wed, 25 August 2010 10:48 Go to previous messageGo to next message
Bob de Kruyff   United States
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Neil wrote on Wed, 25 August 2010 09:31

My trusty Onan has a very slow leak straight down on the muffler. Its not coming from the oil filter. Before I tear into it further - any ideas?

Thanks


I'm chasing a giant leak in mine that started virtually within one day. Previous leaks that I conquered included a leaky oil pressure switch--close to the oil filter mounting adapter, as well as loose governor housing bolts. It's been too hot for me to pull the flywheel off mine to see what has happened on the latest go around.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Onan Oil Leak [message #97162 is a reply to message #97151] Wed, 25 August 2010 11:22 Go to previous messageGo to next message
Steven Ferguson is currently offline  Steven Ferguson   United States
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Tough to say as gravity puts all leaking oil on the muffler. The
three most common, and easiest to repair, are the oil filter adapter
gasket (make your own), the oil pressure switch (replace), and the
front seal.


On Wed, Aug 25, 2010 at 8:31 AM, Neil Martin <nmartin@hfbllp.com> wrote:
>
>
> My trusty Onan has a very slow leak straight down on the muffler. Its not coming from the oil filter. Before I tear into it further - any ideas?
>
> Thanks
> --
> Neil
> 76 Eleganza
> Los Angeles
> _______________________________________________
> GMCnet mailing list
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--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Re: Onan Oil Leak [message #97167 is a reply to message #97151] Wed, 25 August 2010 12:12 Go to previous messageGo to next message
wally is currently offline  wally   United States
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Neil wrote on Wed, 25 August 2010 10:31

My trusty Onan has a very slow leak straight down on the muffler. Its not coming from the oil filter. Before I tear into it further - any ideas?

Thanks

Neil, Mine leaked at the oil filter adapter and the block. Onan has a improved gasket that they came up with. Pic here
http://www.gmcmhphotos.com/photos/showphoto.php?photo=17826&cat=4541
I made one but it didn't last so I gave up and went to Cummins and bought one.
JWID

Wally Anderson
Omaha NE
75 Glenbrook

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Re: Onan Oil Leak [message #97175 is a reply to message #97167] Wed, 25 August 2010 12:56 Go to previous messageGo to next message
Neil is currently offline  Neil   United States
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Wally, what was your source for that gasket? Mail order?

Thanks.

Neil
76 Eleganza now sold
Los Angeles

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Re: Onan Oil Leak [message #97176 is a reply to message #97175] Wed, 25 August 2010 13:07 Go to previous messageGo to next message
wally is currently offline  wally   United States
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Neil wrote on Wed, 25 August 2010 12:56

Wally, what was your source for that gasket? Mail order?

Thanks.

Cummins diesel bought Onan a few years back. I went to my local Cummins dealer and they had those gaskets in stock. Here is their website.
http://www.cumminsonan.com/
HTH

Wally Anderson
Omaha NE
75 Glenbrook

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Re: Onan Oil Leak [message #97177 is a reply to message #97176] Wed, 25 August 2010 13:13 Go to previous messageGo to next message
tphipps is currently offline  tphipps   United States
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Onan Parts that are still available are on-line at M&D Mowers. Minimum order of $25 without paying a surcharge. You will need to have an accurate parts number. They have no parts breakdown. Cheaper than Cummings, even if packed in current cumming/Onan boxes.

Tom Phipps,

2012 Phoenix Cruiser model 2552 KA4CSG

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Re: Onan Oil Leak [message #97180 is a reply to message #97177] Wed, 25 August 2010 13:24 Go to previous messageGo to next message
Bob de Kruyff   United States
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Location: Chandler, AZ
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tphipps wrote on Wed, 25 August 2010 12:13

Onan Parts that are still available are on-line at M&D Mowers. Minimum order of $25 without paying a surcharge. You will need to have an accurate parts number. They have no parts breakdown. Cheaper than Cummings, even if packed in current cumming/Onan boxes.

Tom Phipps,



I've bought quite a few parts from them and they are great--best prices, quick shipment and good communication.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Onan Oil Leak [message #97218 is a reply to message #97155] Wed, 25 August 2010 18:56 Go to previous message
jimk is currently offline  jimk   United States
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Neil,
Majority f the time it is leaking from the oil filter mounting bracket that
has gotten loose.
Remove the side cover and go in with an extension and firm it up.

.

>
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
>
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Jim Kanomata
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