As suggested, I'll post up some photos of my progress on the creation of a fresh donor motor for my daughter's 2006 Trailblazer. I had mentioned previously that I had bought her a fixer-upper, with a nice interior, exterior and newer tires. It had some engine noise that turned out to be wiped out rod bearings on cylinders #2 and #4. The motor runs and can move the vehicle around, so I'll leave it there until I prepare a replacement.
I found a local guy who is way ahead of me on the 4.2 Vortec motor fan club. He has about 35 of these summer trucks: (summer better than others). I was jealous and disappointed, 'cause I thought I would be the first in my area to engage in a long term operation focused on these vehicles/engines. I gave him $600 and brought home a 2006 engine. He said it was a runner and would have installed it as is, as it is his practice to replace vs. repair.
I brought the motor home and disassembled it. I'm pleased to report that the motor is a good candidate for rings, bearings and a valve job. The cross hatching in the bores are still present, there is very minimal piston scuffing, and the rod and main bearings look very good. The oil rings are very stuck in their grooves, so I'm glad to have gone ahead with the refreshment of the engine vs simply installing it.
I found a local guy who is way ahead of me on the 4.2 Vortec motor fan club. He has about 35 of these summer trucks: (summer better than others). I was jealous and disappointed, 'cause I thought I would be the first in my area to engage in a long term operation focused on these vehicles/engines. I gave him $600 and brought home a 2006 engine. He said it was a runner and would have installed it as is, as it is his practice to replace vs. repair.
I brought the motor home and disassembled it. I'm pleased to report that the motor is a good candidate for rings, bearings and a valve job. The cross hatching in the bores are still present, there is very minimal piston scuffing, and the rod and main bearings look very good. The oil rings are very stuck in their grooves, so I'm glad to have gone ahead with the refreshment of the engine vs simply installing it.
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