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Old 02-25-2007, 02:06 AM   #1 (permalink)
TurboTahoe
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Leaking coolant quick connect?

Hi guys,

I have a '99 burb and a '95 Tahoe - I've noticed that the last couple of months there seems to be some 'weeping' of coolant from what appears to be a 'quick connect' aluminum pipe located on the passenger side of the engine bay, near the top. Both vehicles seem to be suffering from this. How do I repair this? Thanks,

Rob

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1995 2-door 1/2 ton Tahoe 6.5 TD. Red/Silver Two-Tone with Grey Leather. Positraction Rear End, 3.73, 4L80-E, 4WD, HyperTech chip, Flowmaster crossover and downpipe, modified intake plenum, '97 air cleaner assembly with factory filter, 3" lift, Model 280 flex-a-lite electric fans (which solved cooling problems caused by body lift), Centerline wheels, PowerSlot brake rotors, 175K miles. Hellwig front and rear swaybars. Rancho adjustable shocks on all 4 corners, Heath Remote mount FSD. 0-60 in 9.5 seconds.

1999 3/4 Ton Suburban 6.5 TD SLT Kid Hauler. 124K miles. Black with Tan leather. Hellwig sway bars front and rear. Flowmaster downpipe. Remote FSD under-the-bumper with Kennedy 72" harness and SSDiesel FSD Cooler. PowerSlot brake rotors. THIS RIG IS FOR SALE HERE: https://www.dieselplace.com/forum/45-...condition.html
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Old 02-25-2007, 08:44 AM   #2 (permalink)
Chris611
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I removed the quick connect fitting and screwed a fitting that has a male NPT and a hose barb on the other end. Then cut the aluminum tube. Connect a rubber tube between the two. One problem that you may find, I did, is that the connector that goes into the thermostat housing may break on you. I had to removed the housing and ended up drilling the fitting out and retapping the hole. I've read that its pretty common for these to leak.

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Old 02-26-2007, 12:18 AM   #3 (permalink)
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these things are nitorius for leaking on all gm engines, even the brand new ones will leak soon enough, i like chris611's idea i will try that when mine starts to leak again
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Old 02-26-2007, 12:00 PM   #4 (permalink)
SnowDrift
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Quote:
Originally Posted by TurboTahoe;1615584;
Hi guys,

I have a '99 burb and a '95 Tahoe - I've noticed that the last couple of months there seems to be some 'weeping' of coolant from what appears to be a 'quick connect' aluminum pipe located on the passenger side of the engine bay, near the top. Both vehicles seem to be suffering from this. How do I repair this? Thanks,

Rob
OEM part lasted 12 years, right? Replace it with another OEM part and you might get another 12.
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Old 02-26-2007, 01:31 PM   #5 (permalink)
TurboTahoe
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Thanks for the suggestions guys. My local dealer has them in stock "common failure, says he" for $11.68 each. It appears they are the same for both vehicles. That's inexpensive enough that I'll probably just put new quick-connects in, unless someone has an extremely allergic reaction. I thank you guys for your input - I always value it.

Sincerely,

Rob
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1995 2-door 1/2 ton Tahoe 6.5 TD. Red/Silver Two-Tone with Grey Leather. Positraction Rear End, 3.73, 4L80-E, 4WD, HyperTech chip, Flowmaster crossover and downpipe, modified intake plenum, '97 air cleaner assembly with factory filter, 3" lift, Model 280 flex-a-lite electric fans (which solved cooling problems caused by body lift), Centerline wheels, PowerSlot brake rotors, 175K miles. Hellwig front and rear swaybars. Rancho adjustable shocks on all 4 corners, Heath Remote mount FSD. 0-60 in 9.5 seconds.

1999 3/4 Ton Suburban 6.5 TD SLT Kid Hauler. 124K miles. Black with Tan leather. Hellwig sway bars front and rear. Flowmaster downpipe. Remote FSD under-the-bumper with Kennedy 72" harness and SSDiesel FSD Cooler. PowerSlot brake rotors. THIS RIG IS FOR SALE HERE: https://www.dieselplace.com/forum/45-...condition.html
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Old 02-27-2007, 07:30 AM   #6 (permalink)
joispoi
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they didn't have them at the dealership when mine gave out. I went to the hardware store and bought a brass hose barbs and then I went to napa for the hose. I think the brass hose barb will outlast the truck. Probably the same price as going to the dealer.
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Old 02-27-2007, 09:24 AM   #7 (permalink)
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Quote:
Originally Posted by SnowDrift;1618114;
OEM part lasted 12 years, right? Replace it with another OEM part and you might get another 12.
My only concern though when I swapped mine for a barb fitting was looking at the overall design, little plastic clips, o-rings, and on the hi-way fully loaded and it letting go, and no way to fix it unless carrying a spare.

Least case loose some coolant, worst case loose engine

With the barb fitting and rubber hose, I can replace the bad hose, or if in a really bad bind, duct tape to the rescue, temp patch on the hose so I can limp to somewhere and get a hose.
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Old 02-27-2007, 06:17 PM   #8 (permalink)
JMJNet
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Found it at NAPA today. P/N: 730-4943. Is there a tool to open the quick (dis)connect? They seem to not have it in stock.
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Old 02-27-2007, 07:00 PM   #9 (permalink)
chrisk1500
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The only 'tool' you need is an opposable thumb....

Squeeze the tabs and pull after you of course have taken out the nuts that hold the hose onto the intake...
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Old 02-28-2007, 05:19 PM   #10 (permalink)
TurboTahoe
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I just picked up one from the dealer. I will take a couple of photos and post here so that you can see how they are made. I agree - it is surprising that they last as long as they do, given the seemingly minimal construction.

Sincerely,

Rob

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1995 2-door 1/2 ton Tahoe 6.5 TD. Red/Silver Two-Tone with Grey Leather. Positraction Rear End, 3.73, 4L80-E, 4WD, HyperTech chip, Flowmaster crossover and downpipe, modified intake plenum, '97 air cleaner assembly with factory filter, 3" lift, Model 280 flex-a-lite electric fans (which solved cooling problems caused by body lift), Centerline wheels, PowerSlot brake rotors, 175K miles. Hellwig front and rear swaybars. Rancho adjustable shocks on all 4 corners, Heath Remote mount FSD. 0-60 in 9.5 seconds.

1999 3/4 Ton Suburban 6.5 TD SLT Kid Hauler. 124K miles. Black with Tan leather. Hellwig sway bars front and rear. Flowmaster downpipe. Remote FSD under-the-bumper with Kennedy 72" harness and SSDiesel FSD Cooler. PowerSlot brake rotors. THIS RIG IS FOR SALE HERE: https://www.dieselplace.com/forum/45-...condition.html
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