Hey guys, I have a 2006 Silverado with the LBZ. I have been trying to find this coolant leak for the past couple weeks when I have the time. It trickles down the passenger side and onto the oil pan, then drains off the edge. I thought it was that 1x4 inch coolant block off plate ive seen being discussed before, but I was able to snake my phone up behind the downpipe and saw that it isn't that plate, its just to the right of it, and above. (Attached pictures show this.) It doesn't seem to leak a drop when it is warm, but overnight if I come out I see it drip a few times a minute, it empties my surge tank pretty much overnight. Ive had all the coolant drained previously so could I not be adding coolant properly and causing air to be trapped in the system that it forces coolant out of a weephole? Could it be a freeze plug? I have no idea where to look, its looking like im going to have to pull the egr and/or turbo to get to whatever is leaking. I have no signs of a headgasket leak, no excess pressure, no coolant in my oil, no oil in my coolant, no pressure after truck is cold. Any ideas what to do? Please ask me questions about it so i can help whoever is able to pinpoint where i should look. I haven't had the egr deleted so maybe it is leaking? I can't see anything from up top. Is there a coolant line that goes under anything that I can easily get to on the passenger side? Since it leaks very little when cold should I assume its a gasket and try some kseal or bars? Any insight on this would be helpful. Thanks for reading. (If anyone needs me to take more pictures just ask.)
TheNamesWes
Coolant leak (PLEASE HELP)
Hey guys, I have a 2006 Silverado with the LBZ. I have been trying to find this coolant leak for the past couple weeks when I have the time. It trickles down the passenger side and onto the oil pan, then drains off the edge. I thought it was that 1x4 inch coolant block off plate ive seen being discussed before, but I was able to snake my phone up behind the downpipe and saw that it isn't that plate, its just to the right of it, and above. (Attached pictures show this.) It doesn't seem to leak a drop when it is warm, but overnight if I come out I see it drip a few times a minute, it empties my surge tank pretty much overnight. Ive had all the coolant drained previously so could I not be adding coolant properly and causing air to be trapped in the system that it forces coolant out of a weephole? Could it be a freeze plug? I have no idea where to look, its looking like im going to have to pull the egr and/or turbo to get to whatever is leaking. I have no signs of a headgasket leak, no excess pressure, no coolant in my oil, no oil in my coolant, no pressure after truck is cold. Any ideas what to do? Please ask me questions about it so i can help whoever is able to pinpoint where i should look. I haven't had the egr deleted so maybe it is leaking? I can't see anything from up top. Is there a coolant line that goes under anything that I can easily get to on the passenger side? Since it leaks very little when cold should I assume its a gasket and try some kseal or bars? Any insight on this would be helpful. Thanks for reading. (If anyone needs me to take more pictures just ask.)
Attachments
I had a leak that was hard to pinpoint in this area as well. It turned out to be coolant lines to the EGR. Here's a video that is somewhat similar:
Good luck!
Good luck!
I'll look for that hose right now, but the only thing is that my leak is on the passenger side, this one is on the driver side. I'll go ahead and take all of that stuff apart real quick and see what I see. If anyone has more ideas please share for the time being. If i find my leak I will update this thread.
Understood. Mine was leaking down the passenger side. Check both hoses in & out of the egr cooler. What about the lines in & out of the heater core at the firewall?
EGR coolant inlet, down below your intake....
Begins here.....
And in between the two, a short length of hose
The other source (as mentioned) on the pass side is the coolant outlet from the EGR cooler tube, feeding the heater core at the firewall....plastic quick connect fitting that cracks with age and leaks.
Begins here.....
And in between the two, a short length of hose
The other source (as mentioned) on the pass side is the coolant outlet from the EGR cooler tube, feeding the heater core at the firewall....plastic quick connect fitting that cracks with age and leaks.
Heater hose lines are completely dry, inlet and outlet traces back are fine. I'm pulling the intake off now, thank you for those pictures they help alot. This intake looks like a PITA to get off though lol
The flex tube is easy.
The turbo inlet duct past that, attaches with a single LARGE hose clamp, visible if you remove the turbo resonator on top...loosen that clamp and the inlet duct will rotate clockwise a bit....limited by the crankcase venting T hose attached.
But just removing the flex intake tube should give some visiual access to see if that hose is the leak source or not.
The turbo inlet duct past that, attaches with a single LARGE hose clamp, visible if you remove the turbo resonator on top...loosen that clamp and the inlet duct will rotate clockwise a bit....limited by the crankcase venting T hose attached.
But just removing the flex intake tube should give some visiual access to see if that hose is the leak source or not.
After I deleted the cooler and installed the heater hose mine leaked at the inlet. It would leak down in the valley under the turbo and exit on the passenger side. I replaced the clamp and all has been good since.
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