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| Re: [GMCnet] Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304077 is a reply to message #304076] |
Sat, 23 July 2016 22:37   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Bob,
Those should be steel reinforced hoses which shouldn't rupture suddenly.
BUT, if they're the originals, it should be only a few minute job to
replace them -- the fittings clamp onto the hoses so there's not even any
swaging to be done. If you have or can easily acquire the hose, it
shouldn't take you 45 minutes to replace them.
Ken H.
On Sat, Jul 23, 2016 at 11:20 PM, Bob Dunahugh wrote:
> My 78 Royale Mouse House has it's original hoses. I don't have time to
> get them changed before my trip Tuesday. Their not leaking now. I'm
> concerned. So how are my odds?
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304080 is a reply to message #304078] |
Sat, 23 July 2016 23:10 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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If they are original, replace them.
I got a call from a friend with a 78 transmode about 6 years ago who said his coach was on fire and smoking but no flames that he saw. The fire dept was called. It turned out that an oil hose sprung a leak and was squirting oil all over the hot engine and manifolds. Luckily there was no fire and he was about 15 miles from home. I towed him home with my Blazer and later we replaced the hoses. It was an easy job. We had the replacements made locally but if you have the time to wait, I would get the ones JR Slaten makes and I believe Jim K. sells.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304106 is a reply to message #304087] |
Sun, 24 July 2016 10:28 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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I haven't upgraded to JR's stainless setup yet, but will be. In the meantime I got heavy duty hydraulic hose from Napa to run to the external oil cooler.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: [GMCnet] Fw: Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304114 is a reply to message #304107] |
Sun, 24 July 2016 11:20 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Bob,
IIRC there are 90° metal tubes at the radiator. Carefully cut them off and buy some flareless Parker Hannifin or Swagelok to flared
fittings. Attach the flareless fittings to the tubes and have lines made up to fit.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Bob Dunahugh
Sent: Monday, July 25, 2016 1:22 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Fw: Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly?
It's not a big, or long job to get them out if that's the only issue. The problem I'm having is that I can't get them to unscrew at
the radiator. I've put penitent on, and let it set for days. Tapped lightly on the nut part of the fitting. The engine now has 3,000
miles on it. That would be a severe loss. Maybe the best thing to do now is disconnect the cooler for this trip to Minnesota.
Bob Dunahugh
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304138 is a reply to message #304076] |
Sun, 24 July 2016 15:33 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I took mine out by hacksawing the line at the fitting, and applying a Stillson wrench to the fitting. This can be hard on the knuckles, but will get the fittings out.
Note that the use of the original lines is a good excuse for installing a DigiPanel. If you rupture a line, it will squawk at you before the knocking bearings do.
--johnny
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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| Re: [GMCnet] Fw: Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304140 is a reply to message #304107] |
Sun, 24 July 2016 16:39 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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BobDunahugh wrote on Sun, 24 July 2016 10:22It's not a big, or long job to get them out if that's the only issue. The problem I'm having is that I can't get them to unscrew at the radiator. I've put penitent on, and let it set for days. Tapped lightly on the nut part of the fitting. The engine now has 3,000 miles on it. That would be a severe loss. Maybe the best thing to do now is disconnect the cooler for this trip to Minnesota.
Bob Dunahugh
Soak with Kroil for a few days and use a flame wrench each day. They will come loose. I usually heat them and then shock cool them with kroil.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Do the engine oil cooler hoses just start to leak. Then rupture. Our do they just rupture unexpectedly? [message #304257 is a reply to message #304251] |
Tue, 26 July 2016 08:10 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Bob,
The 455 used a combination of tubes and flex hoses, the 403 used flex hoses only.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: Bob Dunahugh
I wanted to get the hoses off the burned GMC. And take them out to get the 4 hoses replaced. As these had fire sleeves on them. I
still can't get them off of the radiator. So I went to the Mouse House to get that set out. As they had to come out anyway. It looks
as though the oil cooler hoses were replaced in 1994 when the 403 was rebuilt. The GMC was driven 1880 miles to the end of 1995.
Then parked next to the corn field. What I found was that there were two hydraulic hoses running from the radiator to the 403. With
some non stock hose supports installed. Both hoses feel like new. And are pliable. I did try to get them out to put fire sleeve on
them. But I'm back to I can't get them off that Radiator either. But it appears all is well for now.
Bob
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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