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Hummer H2For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.
So my H2 has had a drip here and a drip there for some time. I finally tracked it down to the oil cooler lines and a valve cover gasket. So today I installed a oil cooler block off plate and new valve cover gaskets. I added a little color while I was at it. I was extremely happy with how clean the valve train is after 170,000 plus miles.
I feel fairly confident that my oil cooler port is leaking as well, why did you block it off instead of replacing gasket/lines.
A few reasons. The block off plate was a whopping $18, so it was the easiest way to find out if my leak was indeed coming from the oil cooler lines. New lines are upwards of $120 and a pain in the *** to get to for replacement. All I did was disconnect the connection block and threw in the new plate, I left the lines in place for now. I also would have wanted to change over to lines from a newer Hummer with electric fans as I just tried to convert mine but failed because the 2005 lines do not offer the clearance needed for electric fans. I also don't know that an oil cooler is an absolute necessity. These Gen III engines are some of the only LS engines with an external oil cooler so I didn't think it would hurt. My overall temps are really low as it is from the new 3 core radiator. I will probably put new lines on it when and if I go with headers but that's another project.
I think he meant exhaust manifold bolts which don’t need to be removed for the knock sensors. From the picture your rear most exhaust manifold head seems to be missing.
05-17-2020, 04:24 PM
Tired of the oil leaks
