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Tranny cooler line leaking


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Old 01-26-2014, 08:51 PM   #1
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Is there a way to tighten the fitting for the tranny cooler line where it goes in to the radiator or do I just have to replace the line? bottom fitting on the passenger side.



The line on the top (the closer line in the pic above) fits much more snug than the bottom one and its leaking just enough to leave a oily residue on the stuff around it but it burns off and doesnt actually leave a drip on the ground or anything and I cant figure out a way to get it tight.

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Old 01-27-2014, 01:18 AM   #2
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You should be able to tighten it up with a flare nut wrench. However is the large fitting on the radiator turning as well? If so you're gonna need a new radiator.

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Old 01-27-2014, 03:43 AM   #3
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The large fitting doesn't spin. I put a regular wrench on the smaller one but didnt want to crank on it too hard so I figured I would ask before I kept trying. I'll find my flare nut wrenches and try a little harder.

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Old 01-27-2014, 04:30 AM   #4
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Quote:
Originally Posted by ***** View Post
The large fitting doesn't spin. I put a regular wrench on the smaller one but didnt want to crank on it too hard so I figured I would ask before I kept trying. I'll find my flare nut wrenches and try a little harder.
Take it off and see if you can tell if the flare is messed up or the threads are before you wrench it down.

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1979 Monte Carlo with a 400hp+ 350ci.
1983 T10 w/2.8L getting parked till can restore and put a v8 in
1994 Blazer 4dr with the CPI(FOR SALE)
1995 Blazer 4Dr 4X4(FOR SALE)
2002 Trailblazer LT
2007 Envoy Denali

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Old 01-27-2014, 01:29 PM   #5
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Yo Mammy

Personally I'd replace it. As much as that sucks, that's how I would proceed.

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Old 01-27-2014, 01:33 PM   #6
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Quote:
Originally Posted by JaketheGriff View Post
Personally I'd replace it. As much as that sucks, that's how I would proceed.
Same here, but OP is staff on S10Forum, he is accustom to all the hack job repairs that forum promotes.

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Old 01-27-2014, 01:55 PM   #7
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Yo Mammy

Are you sure it's leaking at the fitting? It could be leaking at the compression/hose fitting, but I could be wrong.

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Old 01-27-2014, 07:48 PM   #8
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I'm pretty sure its the fitting I posted the pic of because of how loose it feels compared to the top lines fitting but its hard to say because it has left a residue all over both the threaded fitting and the compression fitting. I'll just replace the line to make sure its fixed the first time.

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Old 01-27-2014, 08:43 PM   #9
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Yo Mammy

Yeah, that's dumb either way. I had the same problem on my S10 blazer, and I thought it was coming from the hose, but it was at the fitting, just travelling pretty much the length of the hose, making it a PITA to see where it was bad.

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Old 01-30-2014, 01:59 AM   #10
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any guesses on how much that line ended up costing me from the dealership?

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Old 01-30-2014, 02:42 AM   #11
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I'd say under $100 but I'm not sure which of your vehicles its off.

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1983 T10 w/2.8L getting parked till can restore and put a v8 in
1994 Blazer 4dr with the CPI(FOR SALE)
1995 Blazer 4Dr 4X4(FOR SALE)
2002 Trailblazer LT
2007 Envoy Denali

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Old 01-30-2014, 03:47 AM   #12
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For my Tahoe. I figured it would be around $100 but it was actually only $30. To make it even better they actually had one in stock too.

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Old 02-01-2014, 03:33 PM   #13
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Yo Mammy

Just found out that my truck is leaking on the top hose. It didn't look too complicated, but I'm waiting until i can use my buddies heated garage again, before i tackle it.

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Old 02-01-2014, 03:42 PM   #14
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I started on mine and its a real bitch just to get the fitting out of the transmission. I removed the leaky fitting from the line and realized there is an O ring in there so I'm going to replace that fitting first and see if that takes care of it.

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Old 02-02-2014, 01:29 AM   #15
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Yo Mammy

ahh yeah, the one that's leaking on mine, thankfully goes right to the cooler, so it just has a jesus fitting.

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