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Old 10-21-2010, 02:59 PM   #1
4 Rivet Member
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1989 25' Excella
1989 34.5' Airstream 345
Hobe Sound , Florida
Join Date: Aug 2006
Posts: 294
GMC parts

I have a 89 345 with a 454. Have finally gotten the oil leak fixed, but the oil cooler lines are seeping from the rubber part. Checked with GM and the parts needed (#12472203 and # 12472204) are no longer available from GM. Hopefully someone out there knows where to find old stock or remanufactured parts. If not my only option is to have the lines made to order.
Thanks for any help in advance!
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Old 10-21-2010, 07:00 PM   #2
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1986 34.5' Airstream 345
choctaw , Oklahoma
Join Date: Mar 2006
Posts: 839
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I'd check the yellow pages for 'hose couplings fittings tubing' and have some one build some hydraulic hoses. That's want is on 'Silver Bullet's' transmission and oil cooler lines. Just need to know want fittings you want on the ends, how long and clamp it down.
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Old 10-21-2010, 07:17 PM   #3
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1991 34' Excella
Princeton , New Jersey
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Be careful when specing the fitting on the oil cooler. As I remember they are a bastard 27 mm thread that GM used. If possible cut the lines short of the connection to the cooler and make up new hose lines. Attaching the lines to the old tubing will require more than just hose clamps, because they will leak or slide off the tubing.

Any hydraulic shop should be able to help you.
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

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Old 10-22-2010, 05:19 PM   #4
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1989 34.5' Airstream 345
Silverton , Colorado
Join Date: Oct 2003
Posts: 2,102
Lost my last message, but will try again...There is a Barthmobile Forums that is an alternate information access...they, too, have a fine rig on a P30 chassis, and their forums bailed us out of trouble when it came to finding a part(front hub) that AS couldn't...we ordered from a place in Minnesota(they had 2, we took 'em both) might try their base of information...friendly folks, and as avid about their rigs as we are ours...mike
Michael & Tracy
1989 345 Motorhome
We live for the moment, 'cause when you get there, it's gone...
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Old 10-23-2010, 01:27 PM   #5
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1984 31' Airstream310
Lubbock , Texas
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Thumbs up GMC Parts

I had leaks on mine and leaks are not tolerated on my stuff. Found out that GM dumped these years ago. I went to a Hose and Fittings shop and used my old metal parts and they fabricated new flexible oil hoses that will withstand 1000 PSI and 600 degrees heat and that stopped my leaks. Cost fro me was about 1/3 what the GM parts peeps said they were before they were discontinued.
A Man has got know his limitations-Dirty Harry
That's Some Bad Hat Harry-Jaws 1978
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Old 11-24-2010, 05:42 PM   #6
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1984 34.5' Airstream 345
slaughters , Kentucky
Join Date: Jan 2009
Posts: 21
oil lines

Hi Raveson,
I just had new lines made at NAPA. Take your old ones in and get the right length. They work perfectly. Throw those aluminum things away.

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Old 11-24-2010, 07:46 PM   #7
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1988 32.5' Airstream 325
calgary , alberta
Join Date: Dec 2006
Posts: 177
Hi to all!!! Its -31 here!! Can't wait til feb to go south!!! I went to a hydraulic hose manufacturer and he just copied the old ones and the cost was only $70 not to bad I thought.
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Old 11-24-2010, 09:32 PM   #8
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1984 31' Airstream310
Ajo , Arizona
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Everyone who has our old coaches would be well advised to replace those lines ASAP. Also, the power steering hoses, unless replaced recently, could go at any time.
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Old 11-24-2010, 10:02 PM   #9
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1984 31' Excella
Broken Arrow , Oklahoma
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Oil Lines

NAPA sells "low pressure" hydraulic rubbber line that slips over pipe/hose barb fittings. If you can change the end of the lines to a standard fitting that will mate with the barbs this is the way to go. I have been using this product for over 15 years on several vehicles with no failures.
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