oil cooler line leak at crimp

kickass audio · May 20, 2019

I know this is an all too common problem for the lovely crimp connections that GM makes but my truck is 2 weeks away from having the powertrain warranty expire and I have had an issue where the oil cooler hoses will have a trace of oil at the end of the crimp. It hasn't gotten to the point where it is spraying or making oil drops on the dust shield at the bottom of the engine. I looked into possibly going through and replacing the lines myself but it looks like a hell of a task to undo the 2 bolts holding the lines to the side of my engine block.

I read the powertrain warranty and it said it excludes hoses and lines so i'm certain I am SOL for having it done under warranty and I also worry about having it done just to have a problem with the future lines.

I was thinking of leaving the lines alone and just keeping a close eye on them and if it starts to develop any droplets of engine oil I was thinking I could try and figure out a flaring tool to flare the end of the lines and just use a rubber line and a clamp to secure the line. The only problem I see with this is the oil pressure being so high in stage 2 that it would blow off the line even with the flare and clamp. I also am not sure what kind of tool it is called that flares the pipe like a bubble in the middle and not just a normal flare kit that works at the tip of the pipe. I have a traditional pipe flaring kit but not a specialized flare.

Has anyone tried to clamp the line on their truck? I know people have done it to the transmission lines but they remain at low pressures.

newdude · May 20, 2019

Engine oil cooler lines are covered under powertrain warranty. Take it in, have them do it while you can get it done for free.

DeePa · May 20, 2019

One of mine was replaced under warranty.

PearlSierra · May 21, 2019

My dealer tried to tell me my oil cooler lines were not under powertrain warranty. I politely walked out to my truck got my owner's manual out and showed them where they are listed as covered. Replace them last November. For free

bfife · February 17, 2023

My 2019 Silverado just lost all the oil at stop light (thank God it wasn't going down the interstate at 75mph). I had it towed to Dealership. They told me it was the crimp lines and it would be $800. I am out of the powertrain warranty but seeing how this is a common PROBLEM, I called GM and reported it. They are contacting the Dealership so fingers crossed it gets taken care of.